Outputs (49)

Catalytic pyrolysis of plastic waste using metal-incorporated activated carbons for monomer recovery and carbon nanotube synthesis (2024)
Journal Article
Martínez-Narro, G., Phan, H. H., Hassan, S., Beaumont, S. K., & Phan, A. N. (2024). Catalytic pyrolysis of plastic waste using metal-incorporated activated carbons for monomer recovery and carbon nanotube synthesis. Journal of Environmental Chemical Engineering, 12(2), Article 112226. https://doi.org/10.1016/j.jece.2024.112226

As the global plastic waste crisis intensifies, innovative and sustainable solutions are urgently needed. This study evaluated waste-derived metal-incorporated activated carbon (AC) catalysts for the pyrolysis of mixed plastic waste... Read More about Catalytic pyrolysis of plastic waste using metal-incorporated activated carbons for monomer recovery and carbon nanotube synthesis.

Evidence for Suzuki–Miyaura cross-couplings catalyzed by ligated Pd3-clusters: from cradle to grave (2024)
Journal Article
Jeddi, N., Scott, N. W., Tanner, T., Beaumont, S. K., & Fairlamb, I. J. (2024). Evidence for Suzuki–Miyaura cross-couplings catalyzed by ligated Pd3-clusters: from cradle to grave. Chemical Science, https://doi.org/10.1039/D3SC06447F

Pdn clusters offer unique selectivity and exploitable reactivity in catalysis. Understanding the behavior of Pdn clusters is thus critical for catalysis, applied synthetic organic chemistry and greener outcomes for precious Pd. The Pd3 cluster, [Pd3(... Read More about Evidence for Suzuki–Miyaura cross-couplings catalyzed by ligated Pd3-clusters: from cradle to grave.

Evidence for Suzuki–Miyaura cross-couplings catalyzed by ligated Pd 3 -clusters: from cradle to grave † (2024)
Journal Article
Jeddi, N., Scott, N. W. J., Tanner, T., Beaumont, S. K., & Fairlamb, I. J. S. (2024). Evidence for Suzuki–Miyaura cross-couplings catalyzed by ligated Pd 3 -clusters: from cradle to grave †. Chemical Science, 15(8), 2763-2777. https://doi.org/10.1039/d3sc06447f

Pdn clusters offer unique selectivity and exploitable reactivity in catalysis. Understanding the behavior of Pdn clusters is thus critical for catalysis, applied synthetic organic chemistry and greener outcomes for precious Pd. The Pd3 cluster, [Pd3(... Read More about Evidence for Suzuki–Miyaura cross-couplings catalyzed by ligated Pd 3 -clusters: from cradle to grave †.

Mechanistic Insights into Molecular Crystalline Organometallic Heterogeneous Catalysis through Parahydrogen-Based Nuclear Magnetic Resonance Studies (2023)
Journal Article
Gyton, M. R., Royle, C. G., Beaumont, S. K., Duckett, S. B., & Weller, A. S. (2023). Mechanistic Insights into Molecular Crystalline Organometallic Heterogeneous Catalysis through Parahydrogen-Based Nuclear Magnetic Resonance Studies. Journal of the American Chemical Society, 145(4), 2619-2629. https://doi.org/10.1021/jacs.2c12642

The heterogeneous solid–gas reactions of crystals of [Rh(L2)(propene)][BArF4] (1, L2 = tBu2PCH2CH2PtBu2) with H2 and propene, 1-butene, propyne, or 1-butyne are explored by gas-phase nuclear magnetic resonance (NMR) spectroscopy under batch condition... Read More about Mechanistic Insights into Molecular Crystalline Organometallic Heterogeneous Catalysis through Parahydrogen-Based Nuclear Magnetic Resonance Studies.

High-Ionic-Strength Wastewater Treatment via Catalytic Wet Oxidation over a MnCeOx Catalyst (2022)
Journal Article
Ou, X., Daly, H., Fan, X., Beaumont, S. K., Chansai, S., Garforth, A., …Hardacre, C. (2022). High-Ionic-Strength Wastewater Treatment via Catalytic Wet Oxidation over a MnCeOx Catalyst. ACS Catalysis, 12(13), 7598-7608. https://doi.org/10.1021/acscatal.2c01952

Catalytic wastewater treatment has rarely been applied to treat high-ionic-strength wastewater (HISWW) as it contains large amounts of catalyst poisons (e.g., Cl–). This work investigates the catalytic wet oxidation (CWO) of phenol over a MnCeOx cata... Read More about High-Ionic-Strength Wastewater Treatment via Catalytic Wet Oxidation over a MnCeOx Catalyst.

Effect of concentrated NaCl on catalytic wet oxidation (CWO) of short chain carboxylic acids (2022)
Journal Article
Ou, X., Daly, H., Chansai, S., Beaumont, S., Fan, X., & Hardacre, C. (2022). Effect of concentrated NaCl on catalytic wet oxidation (CWO) of short chain carboxylic acids. Catalysis Communications, 162, https://doi.org/10.1016/j.catcom.2021.106395

The effect of concentrated NaCl (200 g L−1) on CWO of oxalic acid and acetic acid over MnCeOx was investigated at 110 °C and 0.5 MPa O2 to explore the potential of using CWO for shale gas wastewater treatment. The presence of concentrated NaCl hinder... Read More about Effect of concentrated NaCl on catalytic wet oxidation (CWO) of short chain carboxylic acids.

Atom efficient PtCu bimetallic catalysts and ultra dilute alloys for the selective hydrogenation of furfural (2020)
Journal Article
Taylor, M. J., Beaumont, S. K., Islam, M. J., Tsatsos, S., Parlett, C. A., Issacs, M. A., & Kyriakou, G. (2021). Atom efficient PtCu bimetallic catalysts and ultra dilute alloys for the selective hydrogenation of furfural. Applied Catalysis B: Environmental, 284, https://doi.org/10.1016/j.apcatb.2020.119737

A range of Pt:Cu bimetallic nanoparticles were investigated for the liquid-phase selective hydrogenation of furfural, an important platform biomass feedstock. Alloying of the two metals had a profound effect on the overall catalytic activity, providi... Read More about Atom efficient PtCu bimetallic catalysts and ultra dilute alloys for the selective hydrogenation of furfural.

Capture and Release Recyclable Dimethylaminomethyl-Calixarene Functional Cloths for Point-of-Use Removal of Highly Toxic Chromium Water Pollutants (2020)
Journal Article
Bieber, V. S., Ozcelik, E., Cox, H. J., Ottley, C. J., Ratan, J. K., Karaman, M., …Badyal, J. P. S. (2020). Capture and Release Recyclable Dimethylaminomethyl-Calixarene Functional Cloths for Point-of-Use Removal of Highly Toxic Chromium Water Pollutants. ACS Applied Materials and Interfaces, 12(46), 52136-52145. https://doi.org/10.1021/acsami.0c14772

Chromium(VI) contamination of drinking water arises from industrial activity wherever there is a lack of environmental legislation enforcement regarding the removal of such pollutants. Although it is possible to remove such harmful metal ions from dr... Read More about Capture and Release Recyclable Dimethylaminomethyl-Calixarene Functional Cloths for Point-of-Use Removal of Highly Toxic Chromium Water Pollutants.

A spatially orthogonal hierarchically porous acid–base catalyst for cascade and antagonistic reactions (2020)
Journal Article
Isaacs, M. A., Parlett, C. M., Robinson, N., Durndell, L. J., Manayil, J. C., Beaumont, S. K., …Lee, A. F. (2020). A spatially orthogonal hierarchically porous acid–base catalyst for cascade and antagonistic reactions. Nature Catalysis, 3(11), 921-931. https://doi.org/10.1038/s41929-020-00526-5

Complex organic molecules are of great importance to research and industrial chemistry and typically synthesized from smaller building blocks by multistep reactions. The ability to perform multiple (distinct) transformations in a single reactor would... Read More about A spatially orthogonal hierarchically porous acid–base catalyst for cascade and antagonistic reactions.

Nickel-Catalysed Vapour-Phase Hydrogenation of Furfural, Insights into Reactivity and Deactivation (2020)
Journal Article
MacIntosh, K. L., & Beaumont, S. K. (2020). Nickel-Catalysed Vapour-Phase Hydrogenation of Furfural, Insights into Reactivity and Deactivation. Topics in Catalysis, 63, 1446-1462. https://doi.org/10.1007/s11244-020-01341-9

Furfural is a key bioderived platform molecule, and its hydrogenation affords access to a number of important chemical intermediates that can act as “drop-in” replacements to those derived from crude oil or novel alternatives with desirable propertie... Read More about Nickel-Catalysed Vapour-Phase Hydrogenation of Furfural, Insights into Reactivity and Deactivation.

Soft XAS as an in situ technique for the study of heterogeneous catalysts (2020)
Journal Article
Beaumont, S. K. (2020). Soft XAS as an in situ technique for the study of heterogeneous catalysts. Physical Chemistry Chemical Physics, 22(34), 18747-18756. https://doi.org/10.1039/d0cp00657b

Soft x-ray absorption in situ studies of heterogeneous catalysts have been applied to areas such as copper methanol oxidation catalysts and cobalt Fischer-Tropsch type catalysts over a period of around two decades. The technique has the potential to... Read More about Soft XAS as an in situ technique for the study of heterogeneous catalysts.

Catalytic applications of layered double hydroxides in biomass valorisation (2019)
Journal Article
Song, Y., Beaumont, S., Zhang, X., Wilson, K., & Lee, A. F. (2020). Catalytic applications of layered double hydroxides in biomass valorisation. Current Opinion in Green and Sustainable Chemistry, 22, 29-38. https://doi.org/10.1016/j.cogsc.2019.11.005

Catalysis has a rich history of facilitating energy-efficient, selective molecular transformations and contributes to 90% of current chemical manufacturing processes. In a postpetroleum era, catalysis will be pivotal in overcoming the scientific and... Read More about Catalytic applications of layered double hydroxides in biomass valorisation.

Shape-Persistent Porous Organic Cage Supported Palladium Nanoparticles as Heterogeneous Catalytic Materials (2019)
Journal Article
Jiang, S., Cox, H., Papaioannou, E., Tang, C., Liu, H., Murdoch, B. J., …Beaumont, S. K. (2019). Shape-Persistent Porous Organic Cage Supported Palladium Nanoparticles as Heterogeneous Catalytic Materials. Nanoscale, 11(31), 14929-14936. https://doi.org/10.1039/c9nr04553h

Porous Organic Cages (POCs) are an emerging class of self-assembling, porous materials with novel properties. They offer a key advantage over other porous materials in permitting facile solution processing and re-assembly. The combination of POCs wit... Read More about Shape-Persistent Porous Organic Cage Supported Palladium Nanoparticles as Heterogeneous Catalytic Materials.

Comprehensive Experimental and Theoretical Study of the CO + NO Reaction Catalyzed by Au/Ni Nanoparticles (2019)
Journal Article
Kyriakou, G., Márquez, A. M., Holgado, J. P., Taylor, M. J., Wheatley, A. E., Mehta, J. P., …Lambert, R. M. (2019). Comprehensive Experimental and Theoretical Study of the CO + NO Reaction Catalyzed by Au/Ni Nanoparticles. ACS Catalysis, 9, 4919-4929. https://doi.org/10.1021/acscatal.8b05154

The catalytic and structural properties of five different nanoparticle catalysts with varying Au/Ni composition were studied by six different methods, including in situ X-ray absorption spectroscopy and density functional theory (DFT) calculations. T... Read More about Comprehensive Experimental and Theoretical Study of the CO + NO Reaction Catalyzed by Au/Ni Nanoparticles.

Monometallic and bimetallic catalysts based on Pd, Cu and Ni for hydrogen transfer deoxygenation of a prototypical fatty acid to diesel range hydrocarbons (2019)
Journal Article
Cheah, K. W., Taylor, M. J., Osatiashtiani, A., Beaumont, S. K., Nowakowski, D. J., Yusup, S., …Kyriakou, G. (2020). Monometallic and bimetallic catalysts based on Pd, Cu and Ni for hydrogen transfer deoxygenation of a prototypical fatty acid to diesel range hydrocarbons. Catalysis Today, 355, 882-892. https://doi.org/10.1016/j.cattod.2019.03.017

Bimetallic PdxNi(100-x) and PdxCu(100-x) structures of a wide compositional range supported on activated carbon were synthesised via a simple, cheap and commercially relevant method. The surface and bulk properties of both the bimetallic structures a... Read More about Monometallic and bimetallic catalysts based on Pd, Cu and Ni for hydrogen transfer deoxygenation of a prototypical fatty acid to diesel range hydrocarbons.

Catalysis of the Oxygen Evolution Reaction by 4–10 nm Cobalt Nanoparticles (2018)
Journal Article
Locke, E., Jiang, S., & Beaumont, S. K. (2018). Catalysis of the Oxygen Evolution Reaction by 4–10 nm Cobalt Nanoparticles. Topics in Catalysis, 61(9-11), 977-985. https://doi.org/10.1007/s11244-018-0923-4

Electrolysis of water is key technology, not only for clean energy production, but to ensure a continued supply of hydrogen beyond fossil resources, essential to the manufacture of many chemical goods other than fuels. Cobalt nanomaterials have been... Read More about Catalysis of the Oxygen Evolution Reaction by 4–10 nm Cobalt Nanoparticles.

Palladium–poly(ionic liquid) membranes for permselective sonochemical flow catalysis (2018)
Journal Article
Wilson, M., Kore, R., Ritchie, A., Fraser, R., Beaumont, S., Srivastava, R., & Badyal, J. (2018). Palladium–poly(ionic liquid) membranes for permselective sonochemical flow catalysis. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 545, 78-85. https://doi.org/10.1016/j.colsurfa.2018.02.044

Anisotropic palladium–poly(ionic liquid) catalyst membranes have been prepared by complexation of palladium(II) chloride to poly(ionic liquid) functionalised flexible porous substrates. The practical viability of these low loading (sub 0.1 mol%) pall... Read More about Palladium–poly(ionic liquid) membranes for permselective sonochemical flow catalysis.

Evidence for a Localized Source of the Argon in the Lunar Exosphere (2017)
Journal Article
Kegerreis, J. A., Eke, V. R., Massey, R. J., Beaumont, S. K., Elphic, R. C., & Teodoro, L. F. (2017). Evidence for a Localized Source of the Argon in the Lunar Exosphere. Journal of Geophysical Research: Planets, 122(10), 2163-2181. https://doi.org/10.1002/2017je005352

We perform the first tests of various proposed explanations for observed features of the Moon's argon exosphere, including models of the following: spatially varying surface interactions; a source that reflects the lunar near-surface potassium distri... Read More about Evidence for a Localized Source of the Argon in the Lunar Exosphere.

Multi-Dimensional Multi-Functional Catalytic Architecture: A Selectively Functionalized Three-Dimensional Hierarchically Ordered Macro/Mesoporous Network for Cascade Reactions Analyzed by Electron Tomography (2017)
Journal Article
Leary, R., Parlett, C., Barnard, J., de la Pena, F., Isaacs, M., Beaumont, S., …Midgley, P. (2017). Multi-Dimensional Multi-Functional Catalytic Architecture: A Selectively Functionalized Three-Dimensional Hierarchically Ordered Macro/Mesoporous Network for Cascade Reactions Analyzed by Electron Tomography. Microscopy and Microanalysis, 23(S1), 2042-2043. https://doi.org/10.1017/s143192761701087x

Catalytic Hydrogenation and Hydrodeoxygenation of Furfural over Pt(111): A Model System for the Rational Design and Operation of Practical Biomass Conversion Catalysts (2017)
Journal Article
Taylor, M. J., Jiang, L., Reichert, J., Papageorgiou, A. C., Beaumont, S. K., Wilson, K., …Kyriakou, G. (2017). Catalytic Hydrogenation and Hydrodeoxygenation of Furfural over Pt(111): A Model System for the Rational Design and Operation of Practical Biomass Conversion Catalysts. Journal of Physical Chemistry C, 121(15), 8490-8497. https://doi.org/10.1021/acs.jpcc.7b01744

Furfural is a key bioderived platform chemical whose reactivity under hydrogen atmospheres affords diverse chemical intermediates. Here, temperature-programmed reaction spectrometry and complementary scanning tunneling microscopy (STM) are employed t... Read More about Catalytic Hydrogenation and Hydrodeoxygenation of Furfural over Pt(111): A Model System for the Rational Design and Operation of Practical Biomass Conversion Catalysts.

Critical Role of Oxygen in Silver-Catalyzed Glaser-Hay Coupling on Ag(100) in Vacuum and in Solution on Ag Particles (2017)
Journal Article
Orozco, N., Kyriakou, G., Beaumont, S., Fernandez Sanz, J., Holgado, J., Taylor, M., …Lambert, R. (2017). Critical Role of Oxygen in Silver-Catalyzed Glaser-Hay Coupling on Ag(100) in Vacuum and in Solution on Ag Particles. ACS Catalysis, 7(5), 3113-3120. https://doi.org/10.1021/acscatal.7b00431

The essential role of oxygen in enabling heterogeneously catalyzed Glaser-Hay coupling of phenylacetylene on the Ag(100) was elucidated by STM, laboratory and synchrotron photoemission and DFT calculations. In the absence of co-adsorbed oxygen, pheny... Read More about Critical Role of Oxygen in Silver-Catalyzed Glaser-Hay Coupling on Ag(100) in Vacuum and in Solution on Ag Particles.

Magnetic recyclable microcomposite silica-steel core with TiO₂ nanocomposite shell photocatalysts for sustainable water purification (2017)
Journal Article
Wilson, M., Cheng, C., Oswald, G., Srivastava, R., Beaumont, S., & Badyal, J. (2017). Magnetic recyclable microcomposite silica-steel core with TiO₂ nanocomposite shell photocatalysts for sustainable water purification. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 523, 27-37. https://doi.org/10.1016/j.colsurfa.2017.03.034

Micron-sized steel particles encapsulated within a silica host matrix and then coated with a photocatalytic TiO2 nanocomposite shell have been prepared using sol-gel chemistry and shown to readily degrade waterborne organic pollutants during UV illum... Read More about Magnetic recyclable microcomposite silica-steel core with TiO₂ nanocomposite shell photocatalysts for sustainable water purification.

Recyclable palladium catalyst cloths for carbon-carbon coupling reactions (2017)
Journal Article
Wilson, M., Kore, R., Fraser, R., Beaumont, S., Srivastava, R., & Badyal, J. (2017). Recyclable palladium catalyst cloths for carbon-carbon coupling reactions. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 520, 788-795. https://doi.org/10.1016/j.colsurfa.2017.01.050

Low loading palladium catalyst cloths have been prepared by surface complexation of palladium(II) chloride with plasmachemical imidazole functionalised non-woven polypropylene cloth. For Sonogashira, Mizoroki-Heck, and Suzuki-Miyaura carbon-carbon co... Read More about Recyclable palladium catalyst cloths for carbon-carbon coupling reactions.

Smart water channelling through dual wettability by leaves of the bamboo Phyllostachys aurea (2016)
Journal Article
Wigzell, J., Racovita, R., Stentiford, B., Wilson, M., Harris, M., Fletcher, I., …Badyal, J. (2016). Smart water channelling through dual wettability by leaves of the bamboo Phyllostachys aurea. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 506, 344-355. https://doi.org/10.1016/j.colsurfa.2016.06.058

The young leaves of the bamboo plant, Phyllostachys aurea, exhibit a distinct dual wetting behaviour on their adaxial surface. Contact angle analysis, variable pressure (environmental) scanning electron microscopy, gas chromatography, time-of-flight... Read More about Smart water channelling through dual wettability by leaves of the bamboo Phyllostachys aurea.

X-ray spectroscopic and scattering methods applied to the characterisation of cobalt-based Fischer–Tropsch synthesis catalysts (2016)
Journal Article
Herbert, J. J., Senecal, P., Martin, D. J., Bras, W., Beaumont, S. K., & Beale, A. M. (2016). X-ray spectroscopic and scattering methods applied to the characterisation of cobalt-based Fischer–Tropsch synthesis catalysts. Catalysis Science & Technology, 6(15), 5773-5791. https://doi.org/10.1039/c6cy00581k

This review aims to critically assess the use of X-ray techniques, both of a scattering (e.g. X-ray diffraction (XRD), pair distribution function (PDF)) and spectroscopic nature (X-ray absorption spectroscopy (XAFS)), in the study of cobalt-based Fis... Read More about X-ray spectroscopic and scattering methods applied to the characterisation of cobalt-based Fischer–Tropsch synthesis catalysts.

Spatially orthogonal chemical functionalization of a hierarchical pore network for catalytic cascade reactions (2015)
Journal Article
Parlett, C. M., Isaacs, M. A., Beaumont, S. K., Bingham, L. M., Hondow, N. S., Wilson, K., & Lee, A. F. (2016). Spatially orthogonal chemical functionalization of a hierarchical pore network for catalytic cascade reactions. Nature Materials, 15(2), 178-182. https://doi.org/10.1038/nmat4478

The chemical functionality within porous architectures dictates their performance as heterogeneous catalysts1; however, synthetic routes to control the spatial distribution of individual functions within porous solids are limited. Here we report the... Read More about Spatially orthogonal chemical functionalization of a hierarchical pore network for catalytic cascade reactions.

Selective oxidation of cyclohexene through gold functionalized silica monolith microreactors (2015)
Journal Article
Alotaibi, M. T., Taylor, M. J., Liu, D., Beaumont, S. K., & Kyriakou, G. (2016). Selective oxidation of cyclohexene through gold functionalized silica monolith microreactors. Surface Science, 646, 179-185. https://doi.org/10.1016/j.susc.2015.10.039

Two simple, reproducible methods of preparing evenly distributed Au nanoparticle containing mesoporous silica monoliths are investigated. These Au nanoparticle containing monoliths are subsequently investigated as flow reactors for the selective oxid... Read More about Selective oxidation of cyclohexene through gold functionalized silica monolith microreactors.

Conquering Catalyst Complexity: Nanoparticle Synthesis and Instrument Development for Molecular and Atomistic Characterisation Under In Situ Conditions (2015)
Journal Article
Somorjai, G. A., & Beaumont, S. K. (2015). Conquering Catalyst Complexity: Nanoparticle Synthesis and Instrument Development for Molecular and Atomistic Characterisation Under In Situ Conditions. Topics in Catalysis, 58(10), 560-572. https://doi.org/10.1007/s11244-015-0398-5

Most heterogeneous, homogeneous and enzyme catalysts are nanoparticles. Conquering the complexity of such materials’ mode of operation at the atomic and molecular level necessitates being able to elucidate their structure under operational conditions... Read More about Conquering Catalyst Complexity: Nanoparticle Synthesis and Instrument Development for Molecular and Atomistic Characterisation Under In Situ Conditions.

Sonogashira Cross-Coupling and Homocoupling on a Silver Surface: Chlorobenzene and Phenylacetylene on Ag(100) (2015)
Journal Article
Sanchez-Sanchez, C., Orozco, N., Holgado, J. P., Beaumont, S. K., Kyriakou, G., Watson, D. J., …Lambert, R. M. (2015). Sonogashira Cross-Coupling and Homocoupling on a Silver Surface: Chlorobenzene and Phenylacetylene on Ag(100). Journal of the American Chemical Society, 137(2), 940-947. https://doi.org/10.1021/ja5115584

Scanning tunneling microscopy, temperature-programmed reaction, near-edge X-ray absorption fine structure spectroscopy, and density functional theory calculations were used to study the adsorption and reactions of phenylacetylene and chlorobenzene on... Read More about Sonogashira Cross-Coupling and Homocoupling on a Silver Surface: Chlorobenzene and Phenylacetylene on Ag(100).

A nanoscale demonstration of hydrogen atom spillover and surface diffusion across silica using the kinetics of CO₂ methanation catalyzed on spatially separate Pt and Co nanoparticles (2014)
Journal Article
Beaumont, S. K., Alayoglu, S., Specht, C., Kruse, N., & Somorjai, G. A. (2014). A nanoscale demonstration of hydrogen atom spillover and surface diffusion across silica using the kinetics of CO₂ methanation catalyzed on spatially separate Pt and Co nanoparticles. Nano Letters, 14(8), 4792-4796. https://doi.org/10.1021/nl501969k

Hydrogen spillover is of great importance to understanding many phenomena in heterogeneous catalysis and has long been controversial. Here we exploit well-defined nanoparticles to demonstrate its occurrence through evaluation of CO2 methanation kinet... Read More about A nanoscale demonstration of hydrogen atom spillover and surface diffusion across silica using the kinetics of CO₂ methanation catalyzed on spatially separate Pt and Co nanoparticles.

Combining in situ NEXAFS spectroscopy and CO₂ methanation kinetics to study Pt and Co nanoparticle catalysts reveals key insights into the role of platinum in promoted cobalt catalysis (2014)
Journal Article
Beaumont, S. K., Alayoglu, S., Specht, C., Michalak, W. D., Pushkarev, V. V., Guo, J., …Somorjai, G. A. (2014). Combining in situ NEXAFS spectroscopy and CO₂ methanation kinetics to study Pt and Co nanoparticle catalysts reveals key insights into the role of platinum in promoted cobalt catalysis. Journal of the American Chemical Society, 136(28), 9898-9901. https://doi.org/10.1021/ja505286j

The mechanistic role of platinum and precious metals in promoting cobalt hydrogenation catalysts of the type used in reactions such as Fischer–Tropsch synthesis is highly debated. Here we use well-defined monometallic Pt and Co nanoparticles (NPs) an... Read More about Combining in situ NEXAFS spectroscopy and CO₂ methanation kinetics to study Pt and Co nanoparticle catalysts reveals key insights into the role of platinum in promoted cobalt catalysis.

Recent developments in the application of nanomaterials to understanding molecular level processes in cobalt catalysed Fischer-Tropsch synthesis (2014)
Journal Article
Beaumont, S. K. (2014). Recent developments in the application of nanomaterials to understanding molecular level processes in cobalt catalysed Fischer-Tropsch synthesis. Physical Chemistry Chemical Physics, 16(11), 5034-5043. https://doi.org/10.1039/c3cp55030c

This perspective offers an overview of using nanomaterials for understanding cobalt catalysed Fischer–Tropsch chemistry. Nanomaterials now afford unprecedented control of size, shape and structure at the nanometre scale. This makes them invaluable to... Read More about Recent developments in the application of nanomaterials to understanding molecular level processes in cobalt catalysed Fischer-Tropsch synthesis.

Surface Composition Changes of Redox Stabilized Bimetallic CoCu Nanoparticles Supported on Silica under H₂ and O₂ Atmospheres and During Reaction between CO₂ and H₂: In Situ X-ray Spectroscopic Characterization (2013)
Journal Article
Alayoglu, S., Beaumont, S. K., Melaet, G., Lindeman, A. E., Musselwhite, N., Brooks, C. J., …Somorjai, G. A. (2013). Surface Composition Changes of Redox Stabilized Bimetallic CoCu Nanoparticles Supported on Silica under H₂ and O₂ Atmospheres and During Reaction between CO₂ and H₂: In Situ X-ray Spectroscopic Characterization. Journal of Physical Chemistry C, 117(42), 21803-21809. https://doi.org/10.1021/jp405745n

In this paper, we report the colloidal synthesis and detailed characterization of 11 nm bimetallic CoCu nanoparticle catalysts. Presently Co and Cu is an attractive combination because of their respective properties for industrially important Fischer... Read More about Surface Composition Changes of Redox Stabilized Bimetallic CoCu Nanoparticles Supported on Silica under H₂ and O₂ Atmospheres and During Reaction between CO₂ and H₂: In Situ X-ray Spectroscopic Characterization.

Exploring surface science and restructuring in reactive atmospheres of colloidally prepared bimetallic CuNi and CuCo nanoparticles on SiO₂ in situ using ambient pressure X-ray photoelectron spectroscopy (2013)
Journal Article
Beaumont, S. K., Alayoglu, S., Pushkarev, V. V., Liu, Z., Kruse, N., & Somorjai, G. A. (2013). Exploring surface science and restructuring in reactive atmospheres of colloidally prepared bimetallic CuNi and CuCo nanoparticles on SiO₂ in situ using ambient pressure X-ray photoelectron spectroscopy. Faraday Discussions, 162, 31-44. https://doi.org/10.1039/c2fd20145c

Bimetallic nanoparticles (11 nm diameter) of CuNi and CuCo were prepared by a new synthetic route and the 1:1 atomic ratio of their constituent elements confirmed using STEM-EDS at a single particle level. These nanoparticles, supported on the native... Read More about Exploring surface science and restructuring in reactive atmospheres of colloidally prepared bimetallic CuNi and CuCo nanoparticles on SiO₂ in situ using ambient pressure X-ray photoelectron spectroscopy.

Reforming of C₂ Hydrocarbons Over Model Pt Nanoparticle Catalysts (2012)
Journal Article
Alayoglu, S., Pushkarev, V. V., Musselwhite, N., An, K., Beaumont, S. K., & Somorjai, G. A. (2012). Reforming of C₂ Hydrocarbons Over Model Pt Nanoparticle Catalysts. Topics in Catalysis, 55(11-13), 723-730. https://doi.org/10.1007/s11244-012-9873-4

Size-controlled model Pt nanoparticle catalysts, synthesized by colloidal chemistry, were used to study the hydrogenative reforming of three C6 hydrocarbons in mixtures with 5:1 excess of H2: methylcyclopentane, n-hexane and 2-methylpentane. We found... Read More about Reforming of C₂ Hydrocarbons Over Model Pt Nanoparticle Catalysts.

Hydrogenation of benzene and toluene over size controlled Pt/SBA-15 catalysts: Elucidation of the Pt particle size effect on reaction kinetics (2012)
Journal Article
Pushkarev, V. V., An, K., Alayoglu, S., Beaumont, S. K., & Somorjai, G. A. (2012). Hydrogenation of benzene and toluene over size controlled Pt/SBA-15 catalysts: Elucidation of the Pt particle size effect on reaction kinetics. Journal of Catalysis, 292, 64-72. https://doi.org/10.1016/j.jcat.2012.04.022

Vapor-phase hydrogenation of benzene and toluene over a size-dependent (1.5–5.2 nm) series of Pt nanoparticles (NPs) encapsulated in polyvinylpyrrolidone (PVP) or polyamidoamine (PAMAM) dendrimer and supported in SBA-15 mesoporous silica was investig... Read More about Hydrogenation of benzene and toluene over size controlled Pt/SBA-15 catalysts: Elucidation of the Pt particle size effect on reaction kinetics.

Size-Controlled Model Co Nanoparticle Catalysts for CO₂ Hydrogenation: Synthesis, Characterization, and Catalytic Reactions (2012)
Journal Article
: Iablokov, V., Beaumont, S. K., Alayoglu, S., Pushkarev, V. V., Specht, C., Gao, J., …Somorjai, G. A. (2012). Size-Controlled Model Co Nanoparticle Catalysts for CO₂ Hydrogenation: Synthesis, Characterization, and Catalytic Reactions. Nano Letters, 12(6), 3091-3096. https://doi.org/10.1021/nl300973b

Model cobalt catalysts for CO2 hydrogenation were prepared using colloidal chemistry. The turnover frequency at 6 bar and at 200–300 °C increased with cobalt nanoparticle size from 3 to 10 nm. It was demonstrated that near monodisperse nanoparticles... Read More about Size-Controlled Model Co Nanoparticle Catalysts for CO₂ Hydrogenation: Synthesis, Characterization, and Catalytic Reactions.

Heterogeneously catalyzing C-C coupling reactions with precious metal nanoparticles (2012)
Journal Article
Beaumont, S. K. (2012). Heterogeneously catalyzing C-C coupling reactions with precious metal nanoparticles. Journal of Chemical Technology and Biotechnology, 87(5), 595-600. https://doi.org/10.1002/jctb.3748

C–C coupling reactions are ubiquitous in synthetic chemistry, joining together fragments of larger molecules within overall synthetic schemes. Many obvious operational advantages would result from catalyzing such processes heterogeneously, however, t... Read More about Heterogeneously catalyzing C-C coupling reactions with precious metal nanoparticles.

In situ study of oxidation states and structure of 4 nm CoPt bimetallic nanoparticles during CO oxidation using X-ray spectroscopies in comparison with reaction turnover frequency (2012)
Journal Article
Zheng, F., Alayoglu, S., Pushkarev, V. V., Beaumont, S. K., Specht, C., Aksoy, F., …Somorjai, G. A. (2012). In situ study of oxidation states and structure of 4 nm CoPt bimetallic nanoparticles during CO oxidation using X-ray spectroscopies in comparison with reaction turnover frequency. Catalysis Today, 182(1), 54-59. https://doi.org/10.1016/j.cattod.2011.10.009

In situ near edge X-ray absorption fine structure (NEXAFS) spectroscopy and ambient pressure X-ray photoelectron spectroscopy (AP-XPS) were performed to monitor the oxidation state and structure of 4 nm CoPt nanoparticles during the reaction of CO wi... Read More about In situ study of oxidation states and structure of 4 nm CoPt bimetallic nanoparticles during CO oxidation using X-ray spectroscopies in comparison with reaction turnover frequency.

Determination of Molecular Surface Structure, Composition, and Dynamics under Reaction Conditions at High Pressures and at the Solid–Liquid Interface (2011)
Journal Article
Somorjai, G. A., Beaumont, S. K., & Alayoglu, S. (2011). Determination of Molecular Surface Structure, Composition, and Dynamics under Reaction Conditions at High Pressures and at the Solid–Liquid Interface. Angewandte Chemie International Edition, 50(43), 10116-10129. https://doi.org/10.1002/anie.201008214

In the last two decades, surface-science experiments and techniques have been developed to focus on obtaining molecular information under reaction conditions at high pressures (near or above 1 bar) and liquid interfaces. This Minireview describes the... Read More about Determination of Molecular Surface Structure, Composition, and Dynamics under Reaction Conditions at High Pressures and at the Solid–Liquid Interface.

CO₂ Hydrogenation Studies on Co and CoPt Bimetallic Nanoparticles Under Reaction Conditions Using TEM, XPS and NEXAFS (2011)
Journal Article
Alayoglu, S., Beaumont, S. K., Zheng, F., Pushkarev, V. V., Zheng, H., Iablokov, V., …Somorjai, G. A. (2011). CO₂ Hydrogenation Studies on Co and CoPt Bimetallic Nanoparticles Under Reaction Conditions Using TEM, XPS and NEXAFS. Topics in Catalysis, 54(13-15), 778-785. https://doi.org/10.1007/s11244-011-9695-9

Cobalt and platinum–cobalt bimetallic alloy nanoparticles of uniform size distribution where prepared and supported on MCF-17 to produce a controlled and well-characterized model catalyst which was studied under reaction conditions during CO2 hydroge... Read More about CO₂ Hydrogenation Studies on Co and CoPt Bimetallic Nanoparticles Under Reaction Conditions Using TEM, XPS and NEXAFS.

Aspects of Heterogeneous Enantioselective Catalysis by Metals (2011)
Journal Article
Kyriakou, G., Beaumont, S. K., & Lambert, R. M. (2011). Aspects of Heterogeneous Enantioselective Catalysis by Metals. Langmuir, 27(16), 9687-9695. https://doi.org/10.1021/la200009w

Some aspects of metal-catalyzed heterogeneous enantioselective reactions are reviewed with specific reference to four different systems where the phenomena that control enantioselection appear to be very different. In the case of glucose electro-oxid... Read More about Aspects of Heterogeneous Enantioselective Catalysis by Metals.

Identity of the Active Site in Gold Nanoparticle-Catalyzed Sonogashira Coupling of Phenylacetylene and Iodobenzene (2010)
Journal Article
Beaumont, S. K., Kyriakou, G., & Lambert, R. M. (2010). Identity of the Active Site in Gold Nanoparticle-Catalyzed Sonogashira Coupling of Phenylacetylene and Iodobenzene. Journal of the American Chemical Society, 132(35), 12246-12248. https://doi.org/10.1021/ja1063179

XPS, TEM, and reaction studies were used to examine the catalytic behavior of gold species deposited on lanthana toward the cross-coupling of phenylacetylene and odobenzene. Atomically dispersed AuI and AuIII were catalytically inert, whereas metalli... Read More about Identity of the Active Site in Gold Nanoparticle-Catalyzed Sonogashira Coupling of Phenylacetylene and Iodobenzene.

Influence of Adsorption Geometry in the Heterogeneous Enantioselective Catalytic Hydrogenation of a Prototypical Enone (2010)
Journal Article
Beaumont, S. K., Kyriakou, G., Watson, D. J., Vaughan, O. P., Papageorgiou, A. C., & Lambert, R. M. (2010). Influence of Adsorption Geometry in the Heterogeneous Enantioselective Catalytic Hydrogenation of a Prototypical Enone. Journal of Physical Chemistry C, 114(35), 15075-15077. https://doi.org/10.1021/jp105960w

Asymmetric catalysis is of paramount importance in organic synthesis and, in current practice, is achieved by means of homogeneous catalysts. The ability to catalyze such reactions heterogeneously would have a major impact both in the research labora... Read More about Influence of Adsorption Geometry in the Heterogeneous Enantioselective Catalytic Hydrogenation of a Prototypical Enone.

Synthesis, Characterization, and Surface Tethering of Sulfide-Functionalized Ti₁₆-oxo-alkoxy Cages (2010)
Journal Article
Eslava, S., Papageorgiou, A. C., Beaumont, S. K., Kyriakou, G., Wright, D. S., & Lambert, R. M. (2010). Synthesis, Characterization, and Surface Tethering of Sulfide-Functionalized Ti₁₆-oxo-alkoxy Cages. Chemistry of Materials, 22(18), 5174-5178. https://doi.org/10.1021/cm101039k

The parent cage [Ti16O16(OEt)32] readily undergoes ligand exchange with a range of primary alcohols to yield species of the type [Ti16O16(OEt)32−x(OR′)x], with R′ = Me, n-Pr, and n-Bu with x of up to 8. Attempted ligand exchange using the thiol [HO(C... Read More about Synthesis, Characterization, and Surface Tethering of Sulfide-Functionalized Ti₁₆-oxo-alkoxy Cages.

Sonogashira Coupling Catalyzed by Gold Nanoparticles: Does Homogeneous or Heterogeneous Catalysis Dominate? (2010)
Journal Article
Kyriakou, G., Beaumont, S. K., Humphrey, S. M., Antonetti, C., & Lambert, R. M. (2010). Sonogashira Coupling Catalyzed by Gold Nanoparticles: Does Homogeneous or Heterogeneous Catalysis Dominate?. ChemCatChem, 2(11), 1444-1449. https://doi.org/10.1002/cctc.201000154

A variety of measurements indicate that Au-nanoparticle catalyzed Sonogashira coupling of iodobenzene and phenylacetylene is predominantly a heterogeneous process. Large gold particles are much more selective than small ones, consistent with this vie... Read More about Sonogashira Coupling Catalyzed by Gold Nanoparticles: Does Homogeneous or Heterogeneous Catalysis Dominate?.

Sonogashira Coupling on an Extended Gold Surface in Vacuo: Reaction of Phenylacetylene with Iodobenzene on Au(111) (2010)
Journal Article
Kanuru, V. K., Kyriakou, G., Beaumont, S. K., Papageorgiou, A. C., Watson, D. J., & Lambert, R. M. (2010). Sonogashira Coupling on an Extended Gold Surface in Vacuo: Reaction of Phenylacetylene with Iodobenzene on Au(111). Journal of the American Chemical Society, 132(23), 8081-8086. https://doi.org/10.1021/ja1011542

Temperature-programmed reaction measurements supported by scanning tunneling microscopy have shown that phenylacetylene and iodobenzene react on smooth Au(111) under vacuum conditions to yield biphenyl and diphenyldiacetylene, the result of homocoupl... Read More about Sonogashira Coupling on an Extended Gold Surface in Vacuo: Reaction of Phenylacetylene with Iodobenzene on Au(111).

Heterogeneously Catalyzed Asymmetric Hydrogenation of C=C Bonds Directed by Surface-Tethered Chiral Modifiers (2009)
Journal Article
Watson, D. J., Jesudason, R. B. R. J., Beaumont, S. K., Kyriakou, G., Burton, J. W., & Lambert, R. M. (2009). Heterogeneously Catalyzed Asymmetric Hydrogenation of C=C Bonds Directed by Surface-Tethered Chiral Modifiers. Journal of the American Chemical Society, 131(40), 14584-14589. https://doi.org/10.1021/ja906356g

Asymmetric hydrogenation of C═C bonds is of the highest importance in organic synthesis, and such reactions are currently carried out with organometallic homogeneous catalysts. Achieving heterogeneous metal-catalyzed hydrogenation, a highly desirable... Read More about Heterogeneously Catalyzed Asymmetric Hydrogenation of C=C Bonds Directed by Surface-Tethered Chiral Modifiers.

Heterogeneous Photochemistry Relevant to the Troposphere: H₂O₂ Production during the Photochemical Reduction of NO₂ to HONO on UV-Illuminated TiO₂ Surfaces (2009)
Journal Article
Beaumont, S. K., Gustaftson, R. J., & Lambert, R. M. (2009). Heterogeneous Photochemistry Relevant to the Troposphere: H₂O₂ Production during the Photochemical Reduction of NO₂ to HONO on UV-Illuminated TiO₂ Surfaces. ChemPhysChem, 10(2), 331-333. https://doi.org/10.1002/cphc.200800613