| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that, in an aqueous solution, overvoltage of a material for reducing COis large and has low durability at ambient temperatures.SOLUTION: An electrode catalyst of a metal boride is used as a working electrode. An electrode catalyst material includes a boride selected from vanadium (V), niobium (Nb), and tantalum (Ta) and represented by a composition formula MB or MB(M=V, Nb, and Ta), or any one of HfB, WB, WB, WB, FeB, and FeB. |
