Process for growing metal particles by electroplating with in situ inhibition

摘要

A process for manufacturing a catalytic, electrically conductive electrode based on metal particles, comprises: a step of electroplating with a metal salt to form the said metal particles at the surface of an electrode, characterized in that the step of electroplating of the metal salt is performed in the presence of a blocking chemical species with a high power of absorption onto the surface of the said metal particles and with an oxidation potential higher than the reduction potential of the said metal salt such that the blocking chemical species conserves its blocking power during the reduction reaction of the said metal salt, and so as to reduce the size of the metal particles formed, constituting the said catalytic, electrically conductive electrode; and, a step of desorption of the blocking chemical species.

主权项

1. A process for manufacturing a catalytic, electrically conductive electrode based on metal particles, comprising:
electroplating with a metal salt to form the metal particles at the surface of an electrode, wherein the metal is platinum and the electroplating of the metal salt is performed in the presence of a nitro blocking chemical species with a high power of absorption onto the surface of the metal particles and with an oxidation potential higher than the reduction potential of the metal salt:
such that the blocking chemical species conserves its blocking power during the reduction reaction of the metal salt, andso as to reduce the size of the metal particles formed, constituting the catalytic, electrically conductive electrode; the process further comprising desorption of the blocking chemical species.