Potential-Dependent Ionomer Rearrangement on the Pt Surface in Polymer Electrolyte Membrane Fuel Cells

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dc.contributor.authorLee, Dong Wookko
dc.contributor.authorHyun, Jonghyunko
dc.contributor.authorOh, Euntaekko
dc.contributor.authorSeok, Kyunghwako
dc.contributor.authorBae, Hanminko
dc.contributor.authorPark, Jeesooko
dc.contributor.authorKim, Hee-Takko
dc.date.accessioned2024-04-26T11:00:23Z-
dc.date.available2024-04-26T11:00:23Z-
dc.date.created2024-04-26-
dc.date.created2024-04-26-
dc.date.issued2024-01-
dc.identifier.citationACS APPLIED MATERIALS & INTERFACES, v.16, no.4, pp.4637 - 4647-
dc.identifier.issn1944-8244-
dc.identifier.urihttp://hdl.handle.net/10203/319238-
dc.description.abstractThe interface between the catalyst and the ionomer in the catalyst layer of polymer electrolyte membrane fuel cells (PEMFCs) has been a subject of keen interest, but its effect on durability has not been fully understood due to the complexity of the catalyst layer structure. Herein, we utilize a Pt nanoparticle (NP) array electrode fabricated using a block copolymer template as the platform for a focused investigation of the interfacial change between the Nafion thin film and the Pt NP under a constant potential. A set of analyses for the electrodes treated with various potentials reveals that the Nafion thin film becomes densely packed at the intermediate potentials (0.4 and 0.7 V), indicating an increased ionomer-catalyst interaction due to the positive charges formed at the Pt surface at these potentials. Even for a practical PEMFC single cell, we demonstrate that the potential holding at the intermediate potentials increases ionomer adsorption to the Pt surface and the oxygen transport resistance, negatively impacting its power performance. This work provides fresh insight into the mechanism behind the performance fade in PEMFCs caused by potential-dependent ionomer rearrangement.-
dc.languageEnglish-
dc.publisherAMER CHEMICAL SOC-
dc.titlePotential-Dependent Ionomer Rearrangement on the Pt Surface in Polymer Electrolyte Membrane Fuel Cells-
dc.typeArticle-
dc.identifier.wosid001155531200001-
dc.identifier.scopusid2-s2.0-85184344672-
dc.type.rimsART-
dc.citation.volume16-
dc.citation.issue4-
dc.citation.beginningpage4637-
dc.citation.endingpage4647-
dc.citation.publicationnameACS APPLIED MATERIALS & INTERFACES-
dc.identifier.doi10.1021/acsami.3c15827-
dc.contributor.localauthorKim, Hee-Tak-
dc.contributor.nonIdAuthorLee, Dong Wook-
dc.contributor.nonIdAuthorBae, Hanmin-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorpolymer electrolyte membrane fuel cells-
dc.subject.keywordAuthorionomers-
dc.subject.keywordAuthorionomer-catalyst interaction-
dc.subject.keywordAuthorPt nanoparticlearray electrode-
dc.subject.keywordAuthorrearrangement-
dc.subject.keywordAuthoroxygen transport-
dc.subject.keywordPlusOXYGEN REDUCTION REACTION-
dc.subject.keywordPlusATOMIC LAYER DEPOSITION-
dc.subject.keywordPlusTHIN-FILM-
dc.subject.keywordPlusTRANSPORT RESISTANCES-
dc.subject.keywordPlusMOLECULAR-DYNAMICS-
dc.subject.keywordPlusCATHODE CATALYST-
dc.subject.keywordPlusHIGH-POWER-
dc.subject.keywordPlusPLATINUM-
dc.subject.keywordPlusNAFION-
dc.subject.keywordPlusPROPERTY-
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