Oxygen catalyst, electrodes using the oxygen catalyst, and electrochemical measurement method

摘要

PROBLEM TO BE SOLVED: To provide an oxygen catalyst excellent in catalytic activity and composition stability when an alkaline aqueous solution is used as an electrolyte, evaluate an electrode having high activity and stability using the oxygen catalyst, and evaluate the catalytic activity of only the oxygen catalyst. Provide a possible electrochemical measurement method. SOLUTION: The oxygen catalyst is 2θ = 30.07 ° ± 1.00 °, 34.88 ° ± 1.00 °, 50.20 ° ± 1.00 ° in X-ray diffraction measurement using CuKα ray. It is an oxide that has a peak at the position of 59.65 ° ± 1.00 ° and contains bismuth, ruthenium, sodium, and oxygen as constituent elements. / Ru is both greater than 3.5. [Selection diagram] None