CO Oxidation on Aun/TiO2 Catalysts Produced by Size-selected Cluster Deposition

Overview

Journal J Am Chem Soc

Publisher American Chemical Society

Specialty Chemistry

Date 2004 May 6

PMID 15125657

Citations 17

Authors

Sungsik Lee

Chaoyang Fan

Tianpin Wu

Scott L Anderson

Affiliations

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Abstract

Planar model catalysts were prepared by deposition of size-selected gold clusters containing up to seven atoms on rutile TiO2 (110). Molecular oxygen is observed to bind inefficiently to the surface, probably at oxygen vacancies, and some oxygen also appears to bind to the gold clusters. Stable CO binding is observed atop gold for catalysts prepared by Au and Au2 deposition, but not for larger Aun. CO oxidation activity is strongly dependent on cluster size, with Au7-prepared samples >50 times more reactive than samples prepared by Au or Au2 deposition

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