| abstract |
Providing a catalyst for an electrode that has catalytic activity and durability that can withstand practical use, and contributes to cost reduction as compared with a conventional Pt / C catalyst. The electrode catalyst has a carrier and catalyst particles supported on the carrier. The catalyst particle has a core portion, a first shell portion formed on the core portion, and a second shell portion formed on the first shell portion. The core portion includes a W compound containing at least W carbide, the first shell portion includes a Pd single body, and the second shell portion includes a Pt single body. |