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Electrocatalytic Oxygen Reduction in Alkaline Medium at Graphene-Supported Silver-Iron Carbon Nitride Sites Generated During Thermal Decomposition of Silver Hexacyanoferrate

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cris.lastimport.scopus2024-02-12T19:52:54Z
dc.abstract.enSilver-iron carbon nitride, which has been prepared by pyrolysis (under inert atmosphere) of silver hexacyanoferrate(II) deposited on graphene nanoplatelets, is considered here as electrocatalyst for oxygen reduction in alkaline medium (0.1 M potassium hydroxide electrolyte) in comparison to simple silver nanoparticles and iron carbon nitride (prepared separately in a similar manner on graphene nanoplatelets). The performance of catalytic materials has been examined using such electrochemical diagnostic techniques as cyclic voltammetry and rotating ring-disk electrode voltammetry. Upon application of the graphene nanoplatelet-supported mixed silver-iron carbon nitride catalyst, the reduction of oxygen proceeds at more positive potentials, as well as the amounts of hydrogen peroxide (generated during reduction of oxygen at potentials more positive than 0.3 V) are lower relative to those determined at pristine silver nanoparticles and iron carbon nitride (supported on graphene nanoplatelets), when they have been examined separately. The enhancement effect shall be attributed to high activity of silver toward the reduction/ decomposition of H2O2 in basic medium. Additionally, it has been observed that the systems based on carbon nitrides show considerable stability due to strong fixation of metal complexes to CN shells.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorMiecznikowski, Krzysztof
dc.contributor.authorNoto, Vito Di
dc.contributor.authorKulesza, Paweł
dc.contributor.authorDembińska, Beata
dc.contributor.authorNegro, Enrico
dc.contributor.authorBrzozowska, Kamila
dc.contributor.authorSzwed, Adam
dc.date.accessioned2024-01-24T22:33:03Z
dc.date.available2024-01-24T22:33:03Z
dc.date.copyright2018-11-29
dc.date.issued2019
dc.description.accesstimeAT_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number1
dc.description.versionFINAL_PUBLISHED
dc.description.volume10
dc.identifier.doi10.1007/S12678-018-0501-3
dc.identifier.issn1868-2529
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/105965
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofElectrocatalysis
dc.relation.pages112-124
dc.rightsCC-BY
dc.sciencecloudnosend
dc.subject.enGraphene nanoplatelets
dc.subject.enCarbon nitride electrocatalyst
dc.subject.enSilver
dc.subject.enIron
dc.subject.enOxygen reduction reaction
dc.subject.enHydrogen peroxide intermediate
dc.subject.enAlkaline fuel cell
dc.titleElectrocatalytic Oxygen Reduction in Alkaline Medium at Graphene-Supported Silver-Iron Carbon Nitride Sites Generated During Thermal Decomposition of Silver Hexacyanoferrate
dc.typeJournalArticle
dspace.entity.typePublication