Effects of incorporation of ions into Au/TiO2 catalysts for carbon monoxide oxidation

被引：33
作者：
Moma, J. A.
Scurrell, M. S.
Jordaan, W. A.
机构：
[1] Univ Witwatersrand, Sch Chem, Inst Mol Sci, ZA-2050 Johannesburg, South Africa
[2] CSIR, Natl Metrol Lab, ZA-0001 Pretoria, South Africa
来源：
TOPICS IN CATALYSIS | 2007年 / 44卷 / 1-2期
关键词：
dimethylamine; pyridine; STM; amide; surface; Cu(110); amine oxide; gold; carbon monoxide; oxidation; titania; promotion; XPS; SIMS;
D O I：
10.1007/s11244-007-0290-z
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A number of anions and cations have been incorporated into TiO2 as support for gold catalysts and also into as-prepared Au/ TiO2 catalysts at levels of 0.4 mol% and 2.5 mol% with respect to the support. The activities of the catalysts for CO oxidation reveal that the at the higher concentration level of the ions, in all cases, a decrease in activity compared with unmodified Au/TiO2. However, and more interestingly, addition of only 0.4 mol% of the ions to the support, prior to gold addition, in most cases resulted in activity enhancement whilst similar addition to Au/TiO2 resulted in decrease in activity. Attempts have been made to understand the origin of these effects.
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收藏
页码：167 / 172
页数：6
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