| 摘要 |
PROBLEM TO BE SOLVED: To provide a cathode, having sufficiently low hydrogen overvoltage when used for the electrolysis of water or the electrolysis of an aqueous solution of alkali metal chloride, such as salt, and its production. SOLUTION: This cathode is a cathode with low hydrogen overvoltage, prepared by coating a conductive base material with an alloy layer containing Ni and at least one element among Ti, V, Cr, Fe, Zr, and Nb, and this layer is composed of an alloy layer which has a composition consisting of, by at.%, 35-95% Ni and the balance 65-5% of at least one element among Ti, V, Cr, Fe, Zr, and Nb and in which, in the X-ray diffraction by CuKαradiation, the main peak exists between 42 and 45 deg. angles and its half value-width is 0.4-7 deg.. This cathode with low hydrogen overvoltage can be produced by the arc discharge type ion plating method by using a target consisting of, by at.%, 35-95% Ni and 65-5% of at least one element among Ti, V, Cr, Fe, Zr, and Nb, regulating the electric potential of the conductive base material to -100 to 50V, and introducing, as a reactant gas, a gas containing at least one element among hydrogen, carbon, nitrogen, and oxygen.
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