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

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 mg_Ir^-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 efficient charge-transfer channels between in-situ e

SUBMITTER: Wang D 

PROVIDER: S-EPMC11696821 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature