Carbon catalyst for direct fuel cell cathode, and direct fuel cell cathode and direct fuel cell using same
AssigneesNisshinbo Holdings Inc., National University Corporation Gunma University
InventorsTakeaki Kishimoto, Rieko Kobayashi, Jun-ichi Ozaki
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Abstract
Provided is a carbon catalyst for a cathode of a direct fuel cell, which selectively promotes an oxygen reduction reaction even when crossover of a fuel compound occurs. The carbon catalyst for a cathode of a direct fuel cell exhibits an oxygen-reducing catalytic activity in an electrolytic solution containing a fuel compound for the direct fuel cell, and exhibits substantially no catalytic activity to oxidize the fuel compound in the electrolytic solution.
Claims18
A carbon catalyst for a cathode of a direct fuel cell, the carbon catalyst exhibiting an oxygen-reducing catalytic activity in an electrolytic solution containing a fuel compound for the direct fuel cell and exhibiting substantially no catalytic activity to oxidize the fuel compound in the electrolytic solution,
- wherein the carbon catalyst is obtained by the following steps in order:
- (i) carbonizing raw materials comprising a nitrogen-containing organic substance and a metal to obtain a carbonized material,
- (ii) followed by subjecting the carbonized material to metal removal treatment, and then
- (iii) further subjecting the carbonized material to heat treatment at a temperature of 300° C. or more and 1500° C. or less.
A carbon catalyst for a cathode of a direct fuel cell, the carbon catalyst exhibiting an oxygen-reducing catalytic activity in an electrolytic solution containing a fuel compound for the direct fuel cell and exhibiting substantially no catalytic activity to oxidize the fuel compound in the electrolytic solution,
- wherein the carbon catalyst is obtained by
- carbonizing raw materials comprising a nitrogen-containing organic substance and a metal to obtain a carbonized material;
- followed by subjecting the carbonized material to metal impregnation treatment, and
- further subjecting the carbonized material to heat treatment.
Dependencies are inferred from the claim text.