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| Home > Online First > Anode catalyst layer composition for PEM Electrolysis: An in-depth electrochemical analysis |
| Home > Online First > Anode catalyst layer composition for PEM Electrolysis: An in-depth electrochemical analysis |
| Poster (After Call) | FZJ-2025-04715 |
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2025
Abstract: Proton exchange membrane (PEM) water electrolysis is a technology for large-scale hydrogen production.[1,2] The oxygen evolution reaction (OER) at the membrane electrode assembly (MEA) is the rate determining step dominating the overall cell performance. The choice of the OER catalyst and deposition procedure significantly affect the reaction kinetics, chemical stability and electronic conductivity.[3] To maintain a high and long-term consistent cell performance, manufacturing and performance control of the MEA is indispensable.Electrochemical analysis is a powerful tool for MEA evaluation providing information about catalytic activity, kinetics and electrochemically active surface area (ECSA). In addition, scanning electrochemical microscopy and eddy current measurements give insights into the micro- and macroscopic homogeneity of catalyst layers and MEAs.[4,5]In this study, we clarify the significance of electronic conductivity focusing on Ir-based anodes of customized MEAs. The effect of catalyst material and loading on the in-plane MEA resistance, OER performance and ECSA was investigated.Funding: This work was financially supported by the Bundesministerium für Bildung und Forschung (BMBF): Wasserstoff - Leitprojekt H2Giga, Teilvorhaben DERIEL (project number 03HY122C), SEGIWA (project number 03HY121B).[1] A. S. Aricò et al (2013) Appl. Electrochem. 43 107, DOI 10.1007/s10800-012-0490-5[2] T. Wang et al (2022) Carbon Neutr. 1 21, DOI 0.1007/s43979-022-00022-8[3] S. Mo et al (2023) Electrochem. Energy Rev. 6 28, DOI 0.1007/s41918-023-00190-w[4] D. Polcari et al (2016) Chem. Rev. 116 13234, DOI 10.1021/acs.chemrev.6b00067[5] G. Belkacem et al (2024) 24 1629, DOI 10.3390/s24051629
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