An Unusual Activity Pattern in Hydrogen-reduced Nickel–Copper Alloy Catalysts


STUDIES with binary alloys have often been used in efforts to define the electronic factor in catalysis, and special interest has been attached to the compositions at which breaks in the activity occur. Frequently, however, measured patterns of activity cannot readily be related to changes in the electronic structure of the metal1. This communication reports that after sustained hydrogen reduction homogeneous samples of “mixed” evaporated films of nickel and copper exhibit a surface the composition of which is insensitive to the bulk composition. Because preliminary hydrogen-reduction is frequently practised in basic studies we would like to emphasize that the extent to which measured activities are affected probably depends on the duration of such reduction.

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CLARKE, J., BYRNE, J. An Unusual Activity Pattern in Hydrogen-reduced Nickel–Copper Alloy Catalysts. Nature 214, 1109 (1967).

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