| ELECTROCHEMICAL ENERGY MATERIALS AND DEVICES |
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| High-performance Ir Based Double Anode Catalyst Layer for Anion Exchange Membrane Water Electrolysis |
| YIN Yan1, YIN Shuoyao1,2, CHEN Bin1, FENG Yingjie3,*, ZHANG Junfeng1,*
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1 State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
2 National Engineering Laboratory for Mobile Source Emission Control Technology, China Automotive Technology & Research Center Co., Ltd., Tianjin 300300, China
3 Department of Catalytic Science, SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, China |
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Abstract Design of high-performance low-Ir anode catalyst layer is crucial for the commercial development of anion-exchange membrane water electrolysis (AEMWE). In this study, a double catalyst layer structure based on iridium oxide (IrO2) and carbon loaded iridium (IrC) was constructed by catalyst coated substrate (CCS) method to improve AEMWE performance. It was found that the IrC-IrO2 catalyst layer is beneficial to improve the Ir utilization and optimize the transport of electron and hydroxide ions within the catalyst layer due to the highly dispersed morphology of IrC. High AEMWE current density of 2.31 A/cm2 was achieved at 2.0 V under 1 mol/L KOH by combining commercial Pt/C catalyst as cathode and IrC-IrO2 double catalyst layer as the anode. High performance was maintained at low electrolyte concentrations as well as in pure water. This study provides an example of the efficient catalyst layer design for AEMWE technology.
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Published: 25 March 2024
Online: 2024-04-07
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| Fund:SINOPEC Research Fund (122060). |
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Corresponding Authors:
*fengyj.bjhy@sinopec.com;geosign@tju.edu.cn
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2024, Vol. 38 
