Identity of the Active Site in Gold Nanoparticle-Catalyzed Sonogashira Coupling of Phenylacetylene and Iodobenzene

Beaumont, Simon K.; Kyriakou, Georgios; Lambert, Richard M.

Abstract

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 metallic Au0 nanoparticles were both active and very selective. Thus it is metallic gold and not ionic gold that provides the catalytically active sites. Au0 nanoparticles supported on silica, γ-alumina, and BaO were active but relatively unselective; however, as with lanthana, ceria-supported Au0 nanoparticles showed high selectivity. This strong promoting effect of the lanthanide oxide supports on Sonogashira selectivity cannot be accounted for in terms of acid/base, redox, or SMSI effects; it may be tentatively ascribed to metalfsupport hydrogen spillover.

Citation

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

• Journal Article Type: Article
• Publication Date: Sep 8, 2010
• Deposit Date: Nov 27, 2012
• Publicly Available Date: Apr 24, 2014
• Journal: Journal of the American Chemical Society
• Print ISSN: 0002-7863
• Electronic ISSN: 1520-5126
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 132
• Issue: 35
• Pages: 12246-12248
• DOI: https://doi.org/10.1021/ja1063179