ACTIVATION MECHANISM OF AMORPHOUS NixZr100-x ALLOYS DURING CO/H2 REACTION AND PREPARATION METHOD OF POROUS AMORPHOUS ALLOY CATALYSTS
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概要
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The hydrogenation of carbon monoxide over amorphous NixZr100-x (x = 91, 67, 50, 40, 33) alloys was investigated. During the reaction, amorphous Ni50Zr50 and Ni67Zr33 alloys spontaneously increased their catalytic activity by more than two orders of magnitude. The formation of porous structure within the amorphous bulk alloy is mainly responsible for the activity increase. The development process of the porous structure, which finally leads the alloys to segregate into nickel species and ZrO2, can be stopped by decreasing the reaction temperature. This process can, therefore, expose fresh alloy surfaces for use in catalytic reactions and enlarges the specific surface area of amorphous alloy. It is shown that NiZr alloys are catalytically more active than pure Ni for the hydrogenation of carbon monoxide.
著者
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Komiyama Hiroshi
Department Of Chemical Engineering Faculty Of Engineering University Of Tokyo
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Inoue Hakuai
Department Of Bioengineering Soka University
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SHIMOGAKI YUKIHIRO
Department of Chemical Engineering, University of Tokyo
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MASUMOTO TSUYOSHI
Department of Chemical Engineering, University of Tokyo
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KIMURA HISAMICHI
Department of Chemical Engineering, University of Tokyo
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