Importance

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Abstract

This invention relates to a bipolar electrochemical process for toposelective electrodeposition of a catalytic substance on an electrically conductive particulate substrate to produce a catalyst, as well as to the catalyst so produced. The process comprises: (a) placing the conductive particulate substrate and a source of the catalytic substance into an environment capable of conducting electricity; (b) aligning the conductive particulate substrate on which the catalytic substance is to be deposited with respect to an electric field such that the conductive particulate substrate is not in physical contact with electrodes and such that the catalytic substance will be deposited in a predetermined location on the particulate substrate when an electric field is applied; and (c) creating an electric field of a sufficient strength and for a time sufficient to deposit the catalytic substance from the source of the catalytic substance on the conductive particulate substrate at the predetermined location in substantial alignment with the electric field.

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First Claim