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Correlation between Precursor Properties and Performance in the Oxygen Reduction Reaction of Pt and Co “Core-shell” Carbon Nitride-Based Electrocatalysts

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cris.lastimport.scopus2024-02-12T19:47:23Z
dc.abstract.enThis report shows the synthesis of a new family of “core-shell” carbon nitride (CN)-based electrocatalysts (ECs) for the oxygen reduction reaction (ORR) in acid medium. The ECs comprise “cores” of carbon black nanoparticles (NPs) that are covered by a CN “shell” embedding the active sites. The latter include Pt as the “active metal” and Co as the “co-catalyst.” The interplay between the synthesis parameters, the chemical composition, and the ORR performance of the final ECs is elucidated. In particular, the ORR performance and reaction mechanism are studied both in an: (i) “ex-situ” setup, by means of cyclic voltammetry with thin-film rotating ring-disk electrode (CV-TF-RRDE) measurements; and (ii) “in-situ” experiment, i.e., in single proton exchange membrane fuel cells (PEMFCs) tested under operating conditions. A structural hypothesis is proposed that explains both the “ex situ” and the “in situ” ORR results on the basis of: (i) the relative amounts of the reactants used in the precursor synthesis; and (ii) the main temperature of the pyrolysis process (Tf) adopted in the preparation of the ECs. It is shown that the understanding of the fundamental features of the physicochemical processes involved in the preparation of the ECs is crucial in order to improve the proposed synthesis route and to yield ORR ECs exhibiting a performance level beyond the state of the art.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorVezzù, Keti
dc.contributor.authorRutkowska, Iwona
dc.contributor.authorKulesza, Paweł
dc.contributor.authorNale, Angeloclaudio
dc.contributor.authorPagot, Gioele
dc.contributor.authorNoto, Vito Di
dc.contributor.authorNegro, Enrico
dc.date.accessioned2024-01-24T20:53:12Z
dc.date.available2024-01-24T20:53:12Z
dc.date.issued2020
dc.description.financePublikacja bezkosztowa
dc.description.number2
dc.description.volume11
dc.identifier.doi10.1007/S12678-019-00569-8
dc.identifier.issn1868-2529
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/103788
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofElectrocatalysis
dc.relation.pages143-159
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enPtCox carbon nitride-based electrocatalysts
dc.subject.en“Core-shell” morphology
dc.subject.enOxygen reduction reaction
dc.subject.enCV-TF-RRDE method
dc.subject.enPEMFC fabrication and testing
dc.titleCorrelation between Precursor Properties and Performance in the Oxygen Reduction Reaction of Pt and Co “Core-shell” Carbon Nitride-Based Electrocatalysts
dc.typeJournalArticle
dspace.entity.typePublication