Seawater Electrolysis Using All-PGM-Free Catalysts and Cell Components in an Asymmetric Feed
Frisch ML, Thanh TN, Arinchtein A, Hager L, Schmidt J, Brückner S, Kerres J, Strasser P (2023)
Publication Type: Journal article
Publication year: 2023
Journal
Book Volume: 8
Pages Range: 2387-2394
Journal Issue: 5
DOI: 10.1021/acsenergylett.3c00492
Abstract
In arid coastal zones, direct seawater electrolysis appears particularly intriguing for green hydrogen production. State-of-the-art direct seawater electrolyzers, however, show unsatisfactory performance and rely on large amounts of platinum-group metals (PGMs) in the electrodes or hidden as transport layer coatings. Herein, we report an asymmetric-feed electrolyzer design, in which all cell components consist of PGM-free materials. Cobalt- and nickel-based phosphides/chalcogenides not only serve as active and robust electrocatalysts but also are put forth as porous transport layer (PTL) surface coatings enhancing selective seawater splitting performance. In a systematic design study at the single-cell level, we report the integration of our catalysts and PTLs into a membrane-electrode assembly (MEA) using a customized, terphenyl-based anion-exchange membrane (AEM). The presented entirely PGM-free electrolyzer achieves industrially relevant current densities of up to 1.0 A cm-2 below 2.0 Vcell in standardized alkaline seawater and dry cathode operation.
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Germany (DE)How to cite
APA:
Frisch, M.L., Thanh, T.N., Arinchtein, A., Hager, L., Schmidt, J., Brückner, S.,... Strasser, P. (2023). Seawater Electrolysis Using All-PGM-Free Catalysts and Cell Components in an Asymmetric Feed. ACS Energy Letters, 8(5), 2387-2394. https://dx.doi.org/10.1021/acsenergylett.3c00492
MLA:
Frisch, Marvin L., et al. "Seawater Electrolysis Using All-PGM-Free Catalysts and Cell Components in an Asymmetric Feed." ACS Energy Letters 8.5 (2023): 2387-2394.
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