Solar‐Powered AEM Electrolyzer via PGM‐Free (Oxy)hydroxide Anode with Solar to Hydrogen Conversion Efficiency of 12.44%

• DOI: 10.1002/advs.202401782
• Publication Date: 2024-04-24T07:25:27Z
• Authors: Jun Seok Ha; Youngtae Park; Jae‐Yeop Jeong; Seung Hun Lee; Sung Jun Lee; In Tae Kim; Seo Hyun Park; Hyunsoo Jin; Soo Min Kim; Suwon Choi; Chiho Kim; Sung Mook Choi; Bong Kyun Kang; Hyuck Mo Lee; Yoo Sei Park
• Keywords: anion exchange membrane water electrolysis; Science; Q; electrocatalysis; hydrogen energy; solar to hydrogen; 0210 nano-technology; water splitting; Research Article; 0104 chemical sciences

AbstractWater electrolyzers powered by renewable energy are emerging as clean and sustainable technology for producing hydrogen without carbon emissions. Specifically, anion exchange membrane (AEM) electrolyzers utilizing non‐platinum group metal (non‐PGM) catalysts have garnered attention as a cost‐effective method for hydrogen production, especially when integrated with solar cells. Nonetheless, the progress of such integrated systems is hindered by inadequate water electrolysis efficiency, primarily caused by poor oxygen evolution reaction (OER) electrodes. To address this issue, a NiFeCo─OOH has developed as an OER electrocatalyst and successfully demonstrated its efficacy in an AEM electrolyzer, which is powered by renewable electricity and integrated with a silicon solar cell.