Active and highly durable supported catalysts for proton exchange membrane electrolysers.

Autor:	Belami D; Faculty of Science and Engineering, Manchester Metropolitan University Chester Street M1 5GD UK y.regmi@mmu.ac.uk l.king@mmu.ac.uk., Lindley M; Department of Materials, University of Manchester Oxford Road Manchester M13 9PL UK., Jonnalagadda US; School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University 62 Nanyang Drive 637459 Singapore., Goncalves Bullock AM; Faculty of Science and Engineering, Manchester Metropolitan University Chester Street M1 5GD UK y.regmi@mmu.ac.uk l.king@mmu.ac.uk., Fan Q; School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University 62 Nanyang Drive 637459 Singapore., Liu W; School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University 62 Nanyang Drive 637459 Singapore., Haigh SJ; Department of Materials, University of Manchester Oxford Road Manchester M13 9PL UK., Kwan J; Department of Engineering Science, University of Oxford Parks Road Oxford OX1 3PJ UK., Regmi YN; Faculty of Science and Engineering, Manchester Metropolitan University Chester Street M1 5GD UK y.regmi@mmu.ac.uk l.king@mmu.ac.uk., King LA; Faculty of Science and Engineering, Manchester Metropolitan University Chester Street M1 5GD UK y.regmi@mmu.ac.uk l.king@mmu.ac.uk.
Jazyk:	angličtina
Zdroj:	EES catalysis [EES Catal] 2024 Jun 21; Vol. 2 (5), pp. 1139-1151. Date of Electronic Publication: 2024 Jun 21 (Print Publication: 2024).
DOI:	10.1039/d4ey00026a
Abstrakt:	The design and development of supported catalysts for the oxygen evolution reaction (OER) is a promising pathway to reducing iridium loading in proton exchange membrane water electrolysers. However, supported catalysts often suffer from poor activity and durability, particularly when deployed in membrane electrode assemblies. In this work, we deploy iridium coated hollow titanium dioxide particles as OER catalysts to achieve higher Ir mass activities than the leading commercial catalysts. Critically, we demonstrate state-of-the-art durabilities for supported iridium catalysts when compared against the previously reported values for analogous device architectures, operating conditions and accelerated stress test profiles. Through extensive materials characterisations alongside rotating disk electrode measurements, we investigate the role of conductivity, morphology, oxidation state and crystallinity on the OER electrochemical performance. Our work highlights a new supported catalyst design that unlocks high-performance OER activity and durability in commercially relevant testing configurations. Competing Interests: There are no conflicts to declare. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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