Electrochemical Stability of Rhodium-Platinum Core-Shell Nanoparticles : An Identical Location Scanning Transmission Electron Microscopy Study
Vega-Paredes, Miquel (Max-Planck-Institut für Eisenforschung GmbH)
Aymerich-Armengol, Raquel (Max-Planck-Institut für Eisenforschung GmbH)
Arenas Esteban, Daniel (University of Antwerp)
Martí-Sánchez, Sara (Institut Català de Nanociència i Nanotecnologia)
Bals, Sara (University of Antwerp)
Scheu, Christina (Max-Planck-Institut für Eisenforschung GmbH)
Garzón Manjón, Alba (Max-Planck-Institut für Eisenforschung GmbH)

Date:	2023
Abstract:	Rhodium-platinum core-shell nanoparticles on a carbon support (Rh@Pt/C NPs) are promising candidates as anode catalysts for polymer electrolyte membrane fuel cells. However, their electrochemical stability needs to be further explored for successful application in commercial fuel cells. Here we employ identical location scanning transmission electron microscopy to track the morphological and compositional changes of Rh@Pt/C NPs during potential cycling (10 000 cycles, 0. 06-0. 8 V, 0. 5 HSO) down to the atomic level, which are then used for understanding the current evolution occurring during the potential cycles. Our results reveal a high stability of the Rh@Pt/C system and point toward particle detachment from the carbon support as the main degradation mechanism.
Grants:	European Commission 823717 Ministerio de Ciencia e Innovación RYC2021-033479-I
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Fuel cells ; Catalysts ; Identical location ; Degradation ; Platinum ; Rhodium ; Core−shell
Published in:	ACS nano, Vol. 17, Issue 17 (September 2023) , p. 16943-16951, ISSN 1936-086X

DOI: 10.1021/acsnano.3c04039
PMID: 37602824

9 p, 8.4 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles