The catalytic reduction of nitrogen oxide by carbon monoxide over metal oxide catalysts - The correlation of the activities with the surface states of metal oxides.

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概要

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• In the catalytic NO–CO reaction over metal oxide catalysts, the surface states of reduced metal oxides were studied with ESCA, and the correlation of the activities of the reduced metal oxide catalysts for the NO–CO reaction with their surface states was investigated. The surfaces of the catalysts were studied with ESCA after treatments <I>in situ</I>. It was revealed that the surface states of the metal oxides did not always agree with their bulk constituents. For example, it was found that the oxygen in the surface layer of the cobalt oxide after a proper reduction treatment by CO was richer than in its bulk. Moreover, the correlation between the surface states and the activities of those oxides was successfully explained. It was also concluded that, in the NO–CO reaction, the metal states were most active for the cobalt, iron, and nickel oxides, while the Cu<SUP>+</SUP> state was more active than the Gu metal state for the copper oxide.

• 公益社団法人 日本化学会の論文

著者

• SAKURAI Katsumi

  Department of Basic Sciences, The University of Tokyo

• Imanaka Toshinobu

  Department Of Chemical Engineering Faculty Of Engineering Science Osaka University

• Okamoto Yasuaki

  Department Of Applied Chemistry Tokyo University Of Science Yamaguchi

• Teranishi Shiichiro

  Department of Chemical Engineering, Faculty of Engineeing Science, Osaka University

• Okamoto Yasuaki

  Department of Chemical Engineering, Faculty of Engineering Science, Osaka University

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