抄録
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.
