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US 6,884,290 B2Granted
Electrically conductive polycrystalline diamond and particulate metal based electrodes
AssigneeBoard of Trustees of Michigan State University
InventorsGreg M. Swain, Jian Wang
Life of this patent
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Abstract
An electrically conducting and dimensionally stable diamond (12, 14) and metal particle (13) electrode produced by electrodepositing the metal on the diamond is described. The electrode is particularly useful in harsh chemical environments and at high current densities and potentials. The electrode is particularly useful for generating hydrogen, and for reducing oxygen and oxidizing methanol in reactions which are of importance in fuel cells.
Claims11
A process for the production of a diamond electrode which comprises:
- (a) providing a first diamond support, doped with at least one element so as to be electrically conductive;
- (b) electrodepositing particles of a conductive metal with electrocatalytic activity on the diamond support, wherein the particles are irregularly spherical in shape and are dispersed over a surface of the support;
- and
- (c) depositing a diamond film on the surface of the diamond support and around the particles of the conductive metal to surround and anchor the particles on the support and to produce the diamond electrode wherein the particles are conductive through the support.
1 more element
A process for the production of a diamond electrode which comprises:
- (a) providing a first diamond film, doped with at least one element so as to be electrically conductive, on an electrically conductive substrate;
- (b) electrodepositing particles of a conductive metal with electrocatalytic activity on the diamond film, wherein the particles are irregularly spherical in shape and are dispersed over a surface of the support;
- and
- (c) depositing a second diamond film on the surface of the first diamond film and around the particles of the conductive metal to surround anchor the particles on the support and to produce the diamond electrode wherein the particles are conductive through the substrate.
1 more element
Dependencies are inferred from the claim text.