路易斯酸界面效应提升质子电导率实现高耐久低铱质子交换膜水电解
Boosting Protonic Conductivity of Catalyst Layer via Lewis-Acid Interface Effects for Durable,Low-Iridium Proton Exchange Membrane Water Electrolysis
摘要
Abstract
Insufficient protonic conductivity in the anode catalyst layer is a major bottleneck to achieving high performance,durability,and cost-effectiveness in proton exchange membrane water electrolysis(PEMWE)with ultralow iridium loading.Herein,a homogeneous and electron-conducting network of IrO2 nanoparticles was constructed on a Lewis acid-rich ZrO2-x support(denoted as LA-IrO2/ZrO2-x).This design aimed to facilitate proton migration via Lewis acid-mediated interfacial effects while maintaining efficient electronic conductivity.The LA-IrO2/ZrO2-x nanocatalyst with an ultralow iridium loading possesses high surface Lewis acidity,thus exhibiting significantly enhanced proton conductivity along with reduced catalyst layer resistance and improved utilization at high current density.In practical PEMWE applications,the LA-IrO2/ZrO2-x anode with a low Ir loading of 0.34 mg/cm2 achieved 1.83 V at 3 A/cm2 and 2.36 V at 8 A/cm2.Moreover,it also exhibited remarkable operational stability,operating continuously for over 1000 h at 1 A/cm2 with a negligible voltage decay rate of only～4.06 μV/h.This work provides a viable strategy for selectively enhancing protonic conductivity without compromising electron transport,thereby paving the way for durable,high-performance PEMWE with ultralow iridium loading.关键词
质子电导率/低铱载量/催化层电阻/路易斯酸性/质子交换膜水电解Key words
Protonic conductivity/Low iridium loading/Catalyst layer resistance/Lewis acidity/Proton exchange membrane water electrolysis分类
化学化工引用本文复制引用
宋若尘,马荣鹏,余浩,葛君杰..路易斯酸界面效应提升质子电导率实现高耐久低铱质子交换膜水电解[J].应用化学,2026,43(6):935-947,中插13-中插23,24.基金项目
国家自然科学基金(Nos.U22A20396,12205301,22373090)、安徽省自然科学基金(Nos.202423i08050031,2208085UD04)、辽宁滨海实验室联合基金类项目(No.LBLF-2023-04)、山东能源研究院创新基金(No.SEI U202307)、中央高校基本科研业务费专项资金(No.WK2090000056)和榆林中科洁净能源创新研究院能源革命科技专项(No.99203070)资助 Supported by the National Natural Science Foundation of China(Nos.U22A20396,12205301,22373090),the Natural Science Foundation of Anhui Province(Nos.202423i08050031,2208085UD04),Liaoning Binhai Laboratory Joint Fund(No.LBLF-2023-04),the Innovation Fund of Shandong Energy Institute(No.SEI U202307),the Fundamental Research Funds for the Central Universities(No.WK2090000056)and the Energy Revolution S&T Program of Yulin Innovation Institute of Clean Energy of the Chinese Academy of Sciences(No.99203070) （Nos.U22A20396,12205301,22373090）
