Ir-O-Mn embedded in porous nanosheets enhances charge transfer in low-iridium PEM electrolyzers

Wang, Dawei; Lin, Fangxu; Luo, Heng; Zhou, Jinhui; Zhang, Wenshu; Li, Lu; Wei, Yi; Zhang, Qinghua; Gu, Lin; Wang, Yanfei; Luo, Mingchuan; Lv, Fan; Guo, Shaojun

doi:10.1038/s41467-024-54646-8

articleNature CommunicationsJan 2, 2025GOLD OA

Ir-O-Mn embedded in porous nanosheets enhances charge transfer in low-iridium PEM electrolyzers

DWDawei Wang FLFangxu Lin HLHeng Luo JZJinhui Zhou WZWenshu Zhang

Peking University · Institute of Physics · +2 more institutions

PubMed

Indexed incrossrefdoajpubmed

Abstract

Using metal oxides to disperse iridium (Ir) in the anode layer proves effective for lowering Ir loading in proton exchange membrane water electrolyzers (PEMWE). However, the reported low-Ir-based catalysts still suffer from unsatisfying electrolytic efficiency and durability under practical industrial working conditions, mainly due to insufficient catalytic activity and mass transport in the catalyst layer. Herein we report a class of porous heterogeneous nanosheet catalyst with abundant Ir-O-Mn bonds, achieving a notable mass activity of 4 A mgIr−1 for oxygen evolution reaction at an overpotential of 300 mV, which is 150.6 times higher than that of commercial IrO2. Ir-O-Mn bonds are unraveled to serve as…

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Topics

Keywords

Iridium
Proton exchange membrane fuel cell
Overpotential
Catalysis
Nanosheet
Chemical engineering
Anode
Materials science

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