Enhanced Fe dispersion via “pinning” effect of thiocyanate ion on ferric ion in Fe-N-S-doped catalyst as an excellent oxygen reduction reaction electrode

Chengyong Shu, Yuanzhen Chen, Xiao Dong Yang, Yan Liu, Shaokun Chong, Yuan Fang, Yongning Liu, Wei Hua Yang

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

In this study, by using thiocyanate as an iron ion dispersing agent, the pinning effect of thiocyanate ion (SCN) enables the high dispersion of Fe3+ in a nitrogen-doped carbon polymer and significantly promotes ORR catalysis in both acidic and alkaline media. It shows 47.3 A g−1 kinetic ORR current density in 0.1 M H2SO4 solution at 0.8 V vs. RHE. In addition, SCN can dope into the base material and modify the surface of catalysts, which generates strong cyanide N functional groups. Additionally, it also has a higher BET surface area and more uniform granularity, which accounts for the enhancement in mass transport.

Original languageEnglish
Pages (from-to)161-167
Number of pages7
JournalJournal of Power Sources
Volume376
DOIs
StatePublished - 1 Feb 2018
Externally publishedYes

Keywords

  • Acid medium
  • Direct methanol fuel cell
  • H/Ofuel cells
  • Oxygen reduction reaction

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