期刊
ACS CATALYSIS
卷 1, 期 7, 页码 805-818出版社
AMER CHEMICAL SOC
DOI: 10.1021/cs200100w
关键词
gold nanoparticles; catalyst design; gold catalysis; CO oxidation; core-shell structure
资金
- National Science Foundation of China [21007011]
- Ministry of Education in China [20100071120012]
- Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, U.S. Department of Energy
- U.S. Department of Energy [DE-AC0S-00OR22725]
Small gold nanoparticles dispersed on certain oxide supports exhibit unprecedented catalytic activities in low-temperature CO oxidation, and gold catalysts show a great potential for selective oxidation or hydrogenation of organic substrates. Nevertheless, most gold catalysts (e.g., Au/ TiO2, Au/Al2O3, Au/Fe2O3, Au/SiO2, Au/CeO2) have been prepared by loading gold on unmodified or modified solid supports through traditional synthesis methodologies (e.g., deposition precipitation, wet impregnation), therefore having simple metal-on-support structures and metal-support interactions. The current Perspective highlights some recent progress in the design of novel structured gold nanocatalysts, including unsupported or supported core shell or yolk hell structures, gold nanoparticles encapsulated in an inorganic matrix, postmodified gold catalysts, gold-based,alloy catalysts, and gold catalysts with additional interfacial sites (or metal mode components) carried to supports or formed in situ on supports. The objective of most of these studies Was to demonstrate synthetic protocols by testing the catalytic performance, of the prepared catalysts in simple probe reactions, and the focus was more on materials synthesis than on catalytic reactions or reaction mechanisms. These novel structured gold catalysts will certainly bring new opportunities for studying their performance in various catalytic reactions, the nature of active sites, reaction mechanisms, and correlations between structure and catalytic properties.
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