期刊
CATALYSIS LETTERS
卷 138, 期 1-2, 页码 56-61出版社
SPRINGER
DOI: 10.1007/s10562-010-0360-x
关键词
CO low-temperature oxidation; Tin oxide supported gold catalyst; Co-precipitation method; Binary noble metal catalyst
资金
- National Natural Science Foundation of China [20777005]
- Natural Science Foundation of Beijing Municipality [8082008]
- Beijing Municipal Foundation for Excellent Person of Ability [20071D0501500210]
yAu/SnO2 (y = 1-5 wt%) and 1 wt% Pt- or Pd-doped 3Au/SnO2 catalysts were prepared by the co-precipitation method. It is observed that the 3Au/SnO2 catalyst showed the best performance (T-100% = 166 degrees C). The pretreatment of 3Au/SnO2 in CO obviously decreased the catalytic activity due to the reduction of oxidized gold species to metallic Au-0. Pd- or Pt-doping to 3Au/SnO2 brought about a significant enhancement in performance, with the T-100% value being 74 and 93 degrees C, respectively. It is concluded that the oxidized gold species were more active than metallic Au-0 and the remarkable improvement in catalytic activity due to Pd or Pt doping was associated with the presence of strong interaction of Pd or Pt with Au.
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