Abstract
1% Pt/Al2O3 and 1% Pt/CeO2 are markedly activated by the deposition of a large quantity of FeO x , about 100 wt% in Fe with respect to the supports. In contrast, the activity of a Ru/Al2O3 catalyst was completely suppressed by the deposition of FeO x , but a Ru-Pt/Al2O3 was markedly activated by the FeO x . The activation depends on the sequence of the deposition, that is, no pronounced activation was observed on the Pt supported on a FeO x /Al2O3 as well as on the Pt codeposited with a small amount of Fe on Al2O3, that is, the activity was almost equal to that of the Pt/Al2O3. The XPS analysis of the Pt/CeO2 and FeO x /Pt/CeO2 proved that the Pt is effectively covered with the FeO x . Selectivity for the oxidation of CO in H2 was also improved on the FeO x /Pt/Al2O3 and FeO x /Pt/CeO2 catalysts and it is rather independent of the conversion. In conformity with the feature of the FeO x /Pt/Al2O3 and FeO x /Pt/CeO2 catalysts, we deduced that the deposited FeO x is activated by the Pt and the FeO x is responsible for the selective oxidation of CO.
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Tanaka, Ki., Moro-oka, Y., Ishigure, K. et al. A New Catalyst for Selective Oxidation of CO in H2: Part 1, Activation by Depositing a Large Amount of FeO x on Pt/Al2O3 and Pt/CeO2 Catalysts. Catalysis Letters 92, 115–121 (2004). https://doi.org/10.1023/B:CATL.0000014333.84509.1a
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DOI: https://doi.org/10.1023/B:CATL.0000014333.84509.1a