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Identity of the active site in gold nanoparticle-catalyzed sonogashira coupling of phenylacetylene and iodobenzene

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

Authors

Georgios Kyriakou

Simon K. Beaumont

Richard M. Lambert



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 iodobenzene. 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 metal → support hydrogen spillover

Publication Date Sep 8, 2010
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
Institution 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
DOI https://doi.org/10.1021/ja1063179
Keywords Colloid and Surface Chemistry; Biochemistry; General Chemistry; Catalysis
Publisher URL http://pubs.acs.org/doi/abs/10.1021/ja1063179
Copyright Statement ©2016 University of Hull
Additional Information Authors' accepted manuscript of article published in: Journal of the American Chemical Society, 2010, v.132, issue 35

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