简便方法制备氮掺杂的碳球用作高效非金属氧还原催化剂

Translated title of the contribution: Simple synthesis of nitrogen-doped carbon spheres as a highly efficient metal-free electrocatalyst for the oxygen reduction reac-tion

Jinhui Tong, Wenyan Li, Lili Bo, Wenhui Wang, Yuliang Li, Tao Li, Qi Zhang, Haiyan Fan

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

In the present work, nitrogen-doped carbon spheres were synthesized through a simple hydrothermal treatment using glucose and melamine as inexpensive carbon and nitrogen sources, respectively. The ratio of melamine to glucose and annealing temperature were optimized. The final optimal sample exhibited a catalytic activity for the oxygen reduction reaction (ORR) that was superior than that of commercial 20%Pt/C in 0.1 mol/L KOH. It revealed an onset potential of -22.6 mV and a half-wave potential of -133.6 mV (vs. Ag/AgCl), which are 7.2 and 5.9 mV more positive than those of the 20%Pt/C catalyst, respectively, as well as a limiting current density of 4.6 mA/cm 2 , which is 0.2 mA/cm 2 higher than that of the 20%Pt/C catalyst. The catalyst also exhibited higher stability and superior durability against methanol than 20%Pt/C. Moreover, ORRs on this catalyst proceed through a more effective 4e - path. The above mentioned superiority of the as-prepared catalyst makes it promising for fuel cells.

Translated title of the contributionSimple synthesis of nitrogen-doped carbon spheres as a highly efficient metal-free electrocatalyst for the oxygen reduction reac-tion
Original languageChinese
Pages (from-to)1138-1145
Number of pages8
JournalChinese Journal of Catalysis
Volume39
Issue number6
DOIs
Publication statusPublished - Jun 1 2018

Keywords

  • Carbon spheres
  • Metal-free catalyst
  • Nitrogen doping
  • Oxygen reduction reaction

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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