In situ solution plasma synthesis of nitrogen-doped carbon nanoparticles as metal-free electrocatalysts for the oxygen reduction reaction

Gasidit Panomsuwan, Satoshi Chiba, Youta Kaneko, Nagahiro Saito, Takahiro Ishizaki

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

We report the in situ synthesis of nitrogen-doped carbon nanoparticles (NCNPs) by a solution plasma process without the addition of metal catalysts. Organic liquid mixtures of benzene and pyrazine were used as the precursors for the synthesis. The nitrogen-doping content can be easily controlled by changing the amount of pyrazine in the precursor. The NCNPs synthesized from the solution plasma process exhibit a turbostratic structure with highly uniform nanoscale particles. The nitrogen atoms can be homogeneously incorporated into the entire carbon structure due to the in situ doping during the growth and formation of the carbon particles. The electrochemical activity toward the oxygen reduction reaction (ORR) of the NCNPs in an alkaline medium reveals the improvement in terms of both the onset potential and current density as the nitrogen-doping content increases. The enhanced ORR activity of the NCNPS is mainly attributed to the presence of pyridinic-N and graphitic-N bonding configurations. They also possess long-term durability and excellent tolerance to methanol crossover effects. The results obtained in this study have demonstrated that the solution plasma process has great potential for the synthesis of metal-free nitrogen-doped carbon electrocatalysts for the ORR. We expect that this approach can be extended to the synthesis of other heteroatom-doped carbonaceous materials for a broad range of research applications in energy conversion and storage.

Original languageEnglish
Pages (from-to)18677-18686
Number of pages10
JournalJournal of Materials Chemistry A
Volume2
Issue number43
DOIs
Publication statusPublished - 2014 Nov 21

Fingerprint

Electrocatalysts
Nitrogen
Carbon
Metals
Oxygen
Nanoparticles
Plasmas
Pyrazines
Doping (additives)
Benzene
Energy conversion
Energy storage
Methanol
Durability
Current density
Atoms
Catalysts
Liquids

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

In situ solution plasma synthesis of nitrogen-doped carbon nanoparticles as metal-free electrocatalysts for the oxygen reduction reaction. / Panomsuwan, Gasidit; Chiba, Satoshi; Kaneko, Youta; Saito, Nagahiro; Ishizaki, Takahiro.

In: Journal of Materials Chemistry A, Vol. 2, No. 43, 21.11.2014, p. 18677-18686.

Research output: Contribution to journalArticle

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