Amorphous Iridium Oxide-Integrated Anode Electrodes with Ultrahigh Material Utilization for Hydrogen Production at Industrial Current Densities  

作　　者：Lei Ding Kui Li Weitian Wang Zhiqiang Xie Shule Yu Haoran Yu David ACullen Alex Keane Kathy Ayers Christopher BCapuano Fangyuan Liu Pu-Xian Gao Feng-Yuan Zhang 

机构地区：[1]Department of Mechanical,Aerospace and Biomedical Engineering,University of Tennessee,Knoxville,TN 37996,USA [2]Oak Ridge National Lab,Center for Nanophase Materials Sciences,Oak Ridge,TN 37831,USA [3]Nel Hydrogen,Wallingford,CT 06492,USA [4]Institute of Materials Science,University of Connecticut,Storrs,CT 06269,USA [5]Department of Materials Science and Engineering,University of Connecticut,Storrs,CT 06269,USA

出　　处：《Nano-Micro Letters》2024年第10期225-239,共15页纳微快报（英文版）

基　　金：the support from the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE) under the Hydrogen and Fuel Cell Technologies Office Awards DE-EE0008426 and DE-EE0008423;National Energy Technology Laboratory under Award DEFE0011585.

摘　　要：Herein,ionomer-free amorphous iridium oxide(IrO_(x))thin electrodes are first developed as highly active anodes for proton exchange membrane electrolyzer cells(PEMECs)via low-cost,environmentally friendly,and easily scalable electrodeposition at room temperature.Combined with a Nafion 117 membrane,the IrO_(x)-integrated electrode with an ultralow loading of 0.075 mg cm^(-2)delivers a high cell efficiency of about 90%,achieving more than 96%catalyst savings and 42-fold higher catalyst utilization compared to commercial catalyst-coated membrane(2 mg cm^(-2)).Additionally,the IrO_(x)electrode demonstrates superior performance,higher catalyst utilization and significantly simplified fabrication with easy scalability compared with the most previously reported anodes.Notably,the remarkable performance could be mainly due to the amorphous phase property,sufficient Ir^(3+)content,and rich surface hydroxide groups in catalysts.Overall,due to the high activity,high cell efficiency,an economical,greatly simplified and easily scalable fabrication process,and ultrahigh material utilization,the IrO_(x)electrode shows great potential to be applied in industry and accelerates the commercialization of PEMECs and renewable energy evolution.

关 键 词：Ionomer-free Amorphous IrOx electrodes Ultrahigh material utilization Scalable electrodeposition Hydrogen production 

分 类 号：TQ116.2[化学工程—无机化工] TQ426