Platinum alloy electrocatalyst
AssigneeN. E. Chemcat Corporation
InventorsTakashi Itoh, Katsuaki Katoh
Life of this patent
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Abstract
Disclosed are a platinum alloy electrocatalyst having high activity and a long life comprising an electrically conductive carrier and dispersed in, and deposited on it, a platinum-iron-cobalt-copper quaternary ordered alloy composed of 40 to 70 atomic % of platinum, 9 to 27 atomic % of iron, 9 to 27 atomic % of cobalt and 9 to 27 atomic % of copper, and an electrode for an acid electrolyte fuel cell which electrode comprises the platinum alloy electrocatalyst, a water-repellent binder and a conductive and acid-resistant supporting member, the electrocatalyst and the water-repellent binder being bonded to.
Claims22
A platinuim alloy electrocatalyst comprising an electrically conductive carrier and dispersed in, and deposited on it, a platinum-iron-cobalt-copper quaternary ordered alloy composed of 40 to 70 atomic % of platinum, 9 to 27 atomic % of iron, 9 to 27 atomic % of cobalt and 9 to 27 atomic % of copper.
The platinum alloy electrocatalyst in which the platinum-iron-cobalt-copper quaternary ordered alloy is of a face-centered cubic structure.
An electrode for an acid electrolyte fuel cell, said electrode comprising a supported platinum alloy electrocatalyst, a water-repellent binder, and an electrically conductive and acid-resistant supporting member to which the electrocatalyst and the water-repellent binder are bonded, said electrocatalyst consisting essentially a conductive powder catalyst comprising a conductive carrier and dispersed in, and deposited on it, a platinum-iron-cobalt-copper quaternary ordered alloy composed of 40 to 70 atomic % of platinum, 9 to 27 atomic % of iron, 9 to 27 atomic % of cobalt and 9 to 27 atomic % of copper.
Dependencies are inferred from the claim text.