Oxygen Reduction Reaction Activity of Thermally Tailored Nitrogen-Doped Carbon Electrocatalysts Prepared through Plasma Synthesis

Oi Lun Li, Yuta Wada, Amane Kaneko, Hoonseung Lee, Takahiro Ishizaki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Although nitrogen-doped carbon catalysts are promising candidates for oxygen reduction reactions (ORRs), the role of the nitrogen bonding structure, such as pyridinic-N, amino-N, and graphitic-N, on the ORR activity remains controversial. Furthermore, despite recent progress in tuning the C−N chemical bonding states within the carbon materials by using chemical vapor deposition and post heat treatment, a systematic evaluation of various N moieties remains challenging, owing to the differences in the thermal stabilities of different types of bonds. Herein, we successfully designed a method to tailor pyridinic-N, amino-N, and graphitic-N bonding in N-doped carbon nanoparticles fabricated through a plasma process combined with post heat treatment. Investigations on the electrochemical performance of the fabricated materials suggested that catalysts with dominant amino-N exhibited higher current density, where graphitic-N has a positive effect on the ORR onset potential. This synthetic strategy provides a simple and efficient approach for studying the relationship between the C−N bonding structure and the electrochemical performance of N-doped carbon catalysts.

Original languageEnglish
Pages (from-to)1995-2001
Number of pages7
JournalChemElectroChem
Volume5
Issue number14
DOIs
Publication statusPublished - 2018 Jul 11

Fingerprint

Electrocatalysts
Nitrogen
Carbon
Oxygen
Plasmas
Catalysts
Heat treatment
Chemical vapor deposition
Thermodynamic stability
Current density
Tuning
Nanoparticles

Keywords

  • graphitic-N
  • nitrogen-doped carbon
  • plasma synthesis
  • pyridinic-N
  • selective doping

ASJC Scopus subject areas

  • Catalysis
  • Electrochemistry

Cite this

Oxygen Reduction Reaction Activity of Thermally Tailored Nitrogen-Doped Carbon Electrocatalysts Prepared through Plasma Synthesis. / Li, Oi Lun; Wada, Yuta; Kaneko, Amane; Lee, Hoonseung; Ishizaki, Takahiro.

In: ChemElectroChem, Vol. 5, No. 14, 11.07.2018, p. 1995-2001.

Research output: Contribution to journalArticle

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AU - Ishizaki, Takahiro

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