1. A New Catalyst for Selective Oxidation of CO in H2: Part 1, Activation by Depositing a Large Amount of FeOx on Pt/Al2O3 and Pt/CeO2 Catalysts.
- Author
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Tanaka, Ken-ichi, Moro-oka, Yoshihiko, Ishigure, Kenkichi, Yajima, Tatsuhiko, Okabe, Yosio, Kato, Yoshinobu, Hamano, Haruo, Sekiya, Shu-ichi, Tanaka, Hiroto, Matsumoto, Yuji, Koinuma, Hideomi, He, Hong, Zhang, Changbin, and Feng, Qingcai
- Subjects
PLATINUM ,CESIUM ,RUTHENIUM ,ALUMINUM ,CARBONYL compounds ,IRON oxides - Abstract
1% Pt/Al
2 O3 and 1% Pt/CeO2 are markedly activated by the deposition of a large quantity of FeOx , about 100 wt% in Fe with respect to the supports. In contrast, the activity of a Ru/Al2 O3 catalyst was completely suppressed by the deposition of FeOx , but a Ru-Pt/Al2 O3 was markedly activated by the FeOx . The activation depends on the sequence of the deposition, that is, no pronounced activation was observed on the Pt supported on a FeOx /Al2 {O}3 as well as on the Pt codeposited with a small amount of Fe on Al2 O3 , that is, the activity was almost equal to that of the Pt/Al2 O3 . The XPS analysis of the Pt/CeO2 and FeOx /Pt/CeO2 proved that the Pt is effectively covered with the FeOx . Selectivity for the oxidation of CO in H2 was also improved on the FeOx /Pt/Al2 O3 and FeOx /Pt/CeO2 catalysts and it is rather independent of the conversion. In conformity with the feature of the FeOx /Pt/Al2 O3 and FeOx /Pt/CeO2 catalysts, we deduced that the deposited FeOx is activated by the Pt and the FeOx is responsible for the selective oxidation of CO. [ABSTRACT FROM AUTHOR]- Published
- 2004
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