| 摘要 |
To improve catalytic efficiency by securing sufficient three phase interfaces in carbon nanohorns, where a reactant gas, a catalyst and an electrolyte meet. The resulting support with a catalyst allows an electrode reaction to proceed efficiently and improves the power generation efficiency of a fuel cell. Also, an electrode having excellent properties and a solid polymer fuel cell including the electrode, capable of giving high battery output are provided. An electrode catalyst for a fuel cell including a carbon nanohorn aggregate as a support, a catalytic metal supported on the carbon nanohorn aggregate support and a polyelectrolyte applied to the carbon nanohorn aggregate support, characterized in that the catalytic metal is not supported in deep regions between carbon nanohorns. Preferably, the catalytic metal has an average particle size of 3.2 to 4.6 nm.
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