Abstract
In order to reduce the cost of anode material for polymer electrolyte water electrolysis, the oxygen evolution reaction (OER) of Ta and Zr compounds film was investigated in sulfuric acid. Both Ta and Zr compounds film on an etched Ti rod was prepared by the reactive sputtering under various conditions which partial pressure of oxygen and nitrogen, and base material temperature were varied. The parameter of peusdo-current density which was related to the active area was defined as i*(= i⋅QA-1), where QA was the anodic electric charge calculated from cyclic voltammogram, and applied for the pseudo-OER specific activity. As a result, the pseudo-OER activity of steady state (iSS.*) on Ta compounds film prepared under the optimal condition as same as that of IrO2. iSS.* of Zr compounds film prepared under optimal condition was higher than that of IrO2.
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