Nitrogen and Sulfur Dual Self-Doped Graphitic Carbon with Highly Catalytic Activity for Oxygen Reduction Reaction

Jinhui Tong, Wenyan Li, Jiangping Ma, Wenhui Wang, Lili Bo, Ziqiang Lei, Abdulla Mahboob

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The use of heteroatom-doped carbon materials in the oxygen reduction reaction (ORR) continues to be an attractive alternative to Pt-based catalyst. In this work, nitrogen and sulfur dual self-doped hierarchically micro- and mesoporous graphitic carbon catalyst was prepared by pyrolysis of methyl orange (Fe (III)) complex, followed by removing the metal species in acid. The catalyst shows high electrocatalytic activity, long-term stability and tolerance for methanol in both acidic and alkaline media. Especially, the catalyst exhibits superior ORR electrocatalytic activity than that of the commercial Pt/C (20 wt %) in 0.1 M KOH: 0.962 and 0.865 V (vs RHE) of onset and half-wave potential was obtained, which is 8/22 mV positive than that for Pt/C, respectively. Additionally, the catalyst exhibits much greater stability than Pt/C. Kinetics investigations show that the catalyst follows the efficient 4-electron pathway for ORR in both the alkaline and acidic electrolyte.

Original languageEnglish
Pages (from-to)5746-5754
Number of pages9
JournalACS Applied Energy Materials
Volume1
Issue number10
DOIs
Publication statusPublished - Oct 22 2018
Externally publishedYes

Keywords

  • fuel cells
  • metal free
  • methyl orange-Fe (III) complex
  • N, S-doped carbon
  • oxygen reduction reaction

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

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