Electrode catalyst for electrochemical reaction, process for producing the electrode catalyst and electrode for electrochemical reaction having the electrode catalyst
View Patent ↗The present invention provides an electrode catalyst for electrochemical reaction, the electrode catalyst having: a conductive diamond particle having fine pores on a surface thereof; and a carbon-reactive catalyst metal in the fine pores, a process for producing the electrode catalyst, and an electrode.
1. A process for producing an electrode catalyst for electrochemical reaction, the process comprising:
forming a thin layer containing a carbon-reactive catalyst metal component on a conductive diamond particle as a base material; and
heat-treating the conductive diamond particle having the thin layer in a reducing gas atmosphere to carry out a carbon reducing reaction due to the catalyst metal so as to form fine pores on a surface of the conductive diamond particle and to carry the catalyst metal in the fine pores, said reducing gas atmosphere comprising hydrogen blended with nitrogen in a ratio of 3 to 30% and 70 to 97%, respectively.
2. The process for producing an electrode catalyst according to claim 1 , wherein a temperature of the heat-treatment is 600 to 900° C.