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Hierarchical oxygen reduction reaction electrocatalysts based on FeSn0.5 species embedded in carbon nitride-graphene based supports

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cris.lastimport.scopus2024-02-12T19:38:31Z
dc.abstract.enThis work reports the synthesis, the physicochemical characterization and the electrochemical studies of new electrocatalysts (ECs) for the oxygen reduction reaction (ORR) that: (i) exhibit a hierarchical architecture; and (ii) do not comprise platinum. The active sites of the ECs consist of Fe and Sn species stabilized in “coordination nests” of a carbon nitride (CN) matrix. The latter exhibits a rough, microporous morphology and acts as a “shell” covering a graphene “core”. This paper: (i) discusses the role played by Fe as the “active metal” in this family of ECs; and (ii) examines in detail how the physicochemical properties and, correspondingly, the electrochemical performance are affected by a suitable activation procedure A meant to boost the ORR kinetics. The results lead to an improved fundamental understanding on the features of the active sites, including the impact of both A and the pH of the environment in their performance and ORR mechanism. These insights clarify the most desirable features to be included in high-performing ECs belonging to this family, paving the way to the synthesis of next-generation, efficient ECs for the ORR that do not comprise platinum.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorNegro, Enrico
dc.contributor.authorNoto, Vito Di
dc.contributor.authorVezzù, Keti
dc.contributor.authorNale, Angeloclaudio
dc.contributor.authorPolizzi, Stefano
dc.contributor.authorPagot, Gioele
dc.contributor.authorBertoncello, Renzo
dc.contributor.authorAnsaldo, Alberto
dc.contributor.authorRutkowska, Iwona
dc.contributor.authorKulesza, Paweł
dc.contributor.authorBonaccorso, Francesco
dc.contributor.authorPrato, Mirko
dc.date.accessioned2024-01-25T03:08:21Z
dc.date.available2024-01-25T03:08:21Z
dc.date.issued2018
dc.description.financeNie dotyczy
dc.description.volume280
dc.identifier.doi10.1016/J.ELECTACTA.2018.05.126
dc.identifier.issn0013-4686
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/108436
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofElectrochimica Acta
dc.relation.pages149-162
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enCV-TF-RRDE method
dc.subject.enGraphene
dc.subject.enHierarchical “core-shell” carbon nitride electrocatalysts
dc.subject.enOxygen reduction reaction
dc.subject.enWide-angle X-ray diffraction
dc.titleHierarchical oxygen reduction reaction electrocatalysts based on FeSn0.5 species embedded in carbon nitride-graphene based supports
dc.typeJournalArticle
dspace.entity.typePublication