CATHODE FOR GENERATING HYDROGEN, CATHODE FOR ALKALINE WATER ELECTROLYSIS, METHOD OF PRODUCING CATHODE, BIPOLAR ELECTROLYTIC CELL, ELECTROLYZER FOR ALKALINE WATER ELECTROLYSIS, AND METHOD OF PRODUCING HYDROGEN
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United States of America Patent
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Mar 27, 2025
app pub date -
Jan 27, 2023
filing date -
Jan 27, 2023
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Abstract
An object is to provide a cathode that maintains high energy conversion efficiency over a long period of time without increase in overvoltage even when hydrogen generation is repeatedly started and stopped. In order to achieve the above-mentioned object, the present disclosure is a cathode for generating hydrogen including a conductive substrate and a catalyst layer including, on a surface of the conductive substrate: at least one of Pt, a Pt oxide, and a Pt hydroxide; and at least one of a metal, an oxide, and a hydroxide of a lanthanoid element that becomes electrochemically stable as trivalent ions within the potential window of water of pH 7 or higher and pH 16 or lower. The molar ratio of the Pt element to the lanthanoid element (Pt:lanthanoid) in the catalyst layer is 95:5 to 65:35.
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