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Binary transition metal doping to create efficient TM–N–C electrocatalysts and enhance ORR catalysis under an external magnetic field

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dc.abstract.enA family of bimetallic oxygen reduction catalysts was prepared from N-containing porous synthetic polymers doped with iron chloride and with the chloride of either Cr, Mn, Co, Cu or Zn. The effects of Fe interaction with the additional transition metal and their magnetic characteristics on the catalytic activity in the oxygen reduction reaction (ORR) in alkaline medium were investigated. In addition, the ORR catalyzed by these bimetallic non-precious metal catalysts was studied under an external magnetic field generated by a permanent magnet. Linear sweep voltammetry in stationary conditions showed that the Co co-doped catalysts exhibit the highest activity, strongly enhanced by an external magnetic field applied at a 90° angle relative to the catalyst layer surface. Rotating ring-disk electrode tests (at pH = 13) showed that catalysts co-doped with either Mn or Zn exhibit the highest catalytic activity. In these instances, an external magnetic field decreases the amount of undesirable peroxide intermediate as it increases the number of electrons transferred for ORR.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorNowicka, Anna
dc.contributor.authorNawała, Jakub
dc.contributor.authorGratzke, Mateusz
dc.contributor.authorDyjak, Sławomir
dc.contributor.authorDonten, Mikołaj
dc.contributor.authorMiecznikowski, Krzysztof
dc.contributor.authorArtyfikiewicz, Maciej
dc.contributor.authorKiciński, Wojciech
dc.date.accessioned2024-01-24T18:38:41Z
dc.date.available2024-01-24T18:38:41Z
dc.date.issued2023
dc.description.financePublikacja bezkosztowa
dc.description.volume935
dc.identifier.doi10.1016/J.JALLCOM.2022.168051
dc.identifier.issn0925-8388
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/102305
dc.identifier.weblinkhttps://doi.org/10.1016/j.jallcom.2022.168051
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofJournal of Alloys and Compounds
dc.relation.pages168051
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleBinary transition metal doping to create efficient TM–N–C electrocatalysts and enhance ORR catalysis under an external magnetic field
dc.typeJournalArticle
dspace.entity.typePublication