Modified graphene as electrocatalyst towards oxygen reduction reaction for fuel cells

Abstract: This paper reports modified graphene-based materials as metal-free electrocatalysts for oxygen reduction reaction (ORR) with outstanding electrocatalytic activity in alkaline conditions. Nitrogen-doped graphene samples are synthesized by a novel procedure. The defect density in the structure of the prepared materials is investigated by Raman spectroscopy.
Further structural characterization by X-ray photoelectron spectroscopy reveals the successful nitrogen doping of graphene. The electrochemical characterization of graphene and nitrogen-doped graphene in 0.1 M KOH solution demonstrates the material’s electrocatalytic activity towards ORR. For graphene an onset potential of - 0.175 V vs. Ag/AgCl reference electrode is determined, while for nitrogen-doped graphene the determined onset potential is - 0.160 V. Thus, the electrocatalytic activity of nitrogen-doped graphene towards ORR is enhanced which can be ascribed to the effect of nitrogen doping

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch
Anmerkungen
Journal of physics. Conference series. 557 (2014), article no. 012009, DOI 10.1088/1742-6596/557/1/012009, issn: 1742-6588

Klassifikation
Ingenieurwissenschaften und Maschinenbau
Schlagwort
Graphen
Elektrokatalyse
Brennstoffzelle

Ereignis
Veröffentlichung
(wo)
Freiburg
(wer)
Universität
(wann)
2018

DOI
10.1088/1742-6596/557/1/012009
URN
urn:nbn:de:bsz:25-freidok-144419
Rechteinformation
Kein Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
25.03.2025, 13:50 MEZ

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