Hybrid anode design of polymer electrolyte membrane water electrolysis cells for ultra-high current density operation with low platinum group metal loading
Yasutake, Masahiro and Noda, Zhiyun and Matsuda, Junko and Lyth, Stephen M. and Nishihara, Masamichi and Ito, Kohei and Hayashi, Akari and Sasaki, Kazunari (2023) Hybrid anode design of polymer electrolyte membrane water electrolysis cells for ultra-high current density operation with low platinum group metal loading. Journal of the Electrochemical Society, 170 (12). 124507. ISSN 0013-4651 (https://doi.org/10.1149/1945-7111/ad1165)
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Abstract
Reducing platinum group metal (PGM) loading and high current density operation are both essential for minimizing the capital expenditure (CAPEX) of polymer electrolyte membrane (PEM) electrolyzers. Catalyst-integrated porous transport electrodes (PTEs) in which iridium acts as both a catalyst and a conductive coating on porous transport layer (PTL) surfaces, enable the preparation of Pt-coating-free PTLs, but can also result in relatively high activation and ohmic overvoltages. Here, a novel hybrid anode design combining an intermediate catalyst layer and a catalyst-integrated PTE is developed. This hybrid anode demonstrates that Ir on PTL can contribute to the oxygen evolution reaction (OER) and exhibits comparable electrolysis performance to a conventional anode consisting of Pt-coated PTL with the same Ir loadings despite Pt-coating-free on the PTL of the hybrid anode. This novel anode eliminates the need for a Pt coating whilst also enabling ultra-high current density operations up to 20 A cm−2 with a total PGM loading of only around 0.6 mg cm−2 on the anode side. This paper proposes a next-generation anode structure with new functions of PTLs for ultra-high current density operation with low PGM loading to significantly reduce green hydrogen costs.
ORCID iDs
Yasutake, Masahiro, Noda, Zhiyun, Matsuda, Junko, Lyth, Stephen M. ORCID: https://orcid.org/0000-0001-9563-867X, Nishihara, Masamichi, Ito, Kohei, Hayashi, Akari and Sasaki, Kazunari;-
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Item type: Article ID code: 88111 Dates: DateEvent8 December 2023Published28 November 2023AcceptedSubjects: Technology > Chemical engineering
Technology > Electrical engineering. Electronics Nuclear engineering > Production of electric energy or powerDepartment: University of Strathclyde > University of Strathclyde Depositing user: Pure Administrator Date deposited: 07 Feb 2024 14:04 Last modified: 27 Sep 2024 21:33 URI: https://strathprints.strath.ac.uk/id/eprint/88111