Cristin-resultat-ID: 1308440
Sist endret: 14. september 2018, 08:58
NVI-rapporteringsår: 2015
Resultat
Vitenskapelig artikkel
2015

One-step electrochemical synthesis of tunable nitrogen-doped graphene

Bidragsytere:
  • Fengliu Lou
  • Marthe Emelie Melandsø Buan
  • Navaneethan Muthuswamy
  • John Walmsley
  • Magnus Rønning og
  • De Chen

Tidsskrift

Journal of Materials Chemistry A
ISSN 2050-7488
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2015
Publisert online: 2015
Trykket: 2016
Volum: 4
Hefte: 4
Sider: 1233 - 1243

Importkilder

Scopus-ID: 2-s2.0-84955476279

Beskrivelse Beskrivelse

Tittel

One-step electrochemical synthesis of tunable nitrogen-doped graphene

Sammendrag

A one-step electrochemical approach for the production of tunable nitrogen-doped graphene has been developed in this work. The simultaneous production and nitrogen incorporation of graphene are realized by electrochemical exfoliation of graphite in an aqueous electrolyte containing (NH4)2SO4 and NH3·H2O, which serve as an exfoliating agent and a nitrogen source, respectively. Both nitrogen contents and nitrogen bonding configurations can be manipulated by tuning the exfoliation conditions. The mechanism of nitrogen doping is proposed, based on analysis of the released gas from the graphite electrode, partially exfoliated graphite and graphene obtained. This green, efficient, low cost and scalable method provides a possible way for the large scale production of high-quality nitrogen-doped graphene. The nitrogen-doped graphene obtained is evaluated as a catalyst for the oxygen reduction reaction. It is demonstrated to be among the best nitrogen-doped graphene-based catalysts for the oxygen reduction reaction, even though the preparation process is extremely facile. Significantly, an Al–air battery is assembled, for the first time, by utilizing nitrogen-doped graphene as the cathode catalyst in this work. It can deliver a high specific capacity of 619 mA h gAl−1, corresponding to a specific energy of 817 W h kgAl−1, which is on a par with or better than that of Al–air batteries based on metal catalysts.

Bidragsytere

Fengliu Lou

  • Tilknyttet:
    Forfatter
    ved Institutt for kjemisk prosessteknologi ved Norges teknisk-naturvitenskapelige universitet

Marthe Emelie Melandsø Buan

  • Tilknyttet:
    Forfatter
    ved Institutt for kjemisk prosessteknologi ved Norges teknisk-naturvitenskapelige universitet

Navaneethan Muthuswamy

  • Tilknyttet:
    Forfatter
    ved Institutt for kjemisk prosessteknologi ved Norges teknisk-naturvitenskapelige universitet

John Walmsley

  • Tilknyttet:
    Forfatter
    ved Materialer og nanoteknologi ved SINTEF AS
  • Tilknyttet:
    Forfatter
    ved Institutt for fysikk ved Norges teknisk-naturvitenskapelige universitet

Magnus Rønning

  • Tilknyttet:
    Forfatter
    ved Institutt for kjemisk prosessteknologi ved Norges teknisk-naturvitenskapelige universitet
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