POSITIVE ELECTRODE FOR WATER ELECTROLYSIS, ELECTROLYSIS CELL AND METHOD FOR PRODUCING POSITIVE ELEC

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An anode for water electrolysis, comprising : a porous nickel substrate; and a thin film formed on at least a part of a surface of the substrate and comprising a perovskite structure metal oxide having a composition represented by formula (1) :         LnNixCo(1-x)O3 ...     (1) wherein, Ln is a metal element comprising a rare-earth element, and x satisfies 0 < x ≤ 1.