Structural analysis of Au/TiO2 catalysts by Debye function analysis

被引:38
作者
Cunningham, DAH
Vogel, W
Sanchez, RMT
Tanaka, K
Haruta, M
机构
[1] Osaka Natl Res Inst, Osaka 5638577, Japan
[2] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany
[3] Cetmic Cno, Mineral Resources & Ceram Technol Ctr, Gonnet, Argentina
关键词
gold; TiO2; catalysis; Debye function analysis; crystal structure; nanoparticles;
D O I
10.1006/jcat.1998.2320
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Catalysts comprising between 1 and 3.6 wt% Au on TiO2 have been studied by Debye function analysis. The structure of the deposited particles in Au/TiO2, prepared by deposition-precipitation, in the presence of magnesium citrate, was predominantly fee cuboctahedral, with a size distribution between 3 and 4 nm. Optimized fits indicate a twin probability of similar to 9%. Au/TiO2 catalysts prepared by photodeposition were found to be much less active for CO oxidation than catalysts prepared by deposition-precipitation and comprised fee cuboctahedral particles between 1 and 7 nm in size. (C) 1999 Academic Press.
引用
收藏
页码:24 / 31
页数:8
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