Tungsten Nitride-Cobalt Anchored in N-Doped Ordered Porous Carbon as an Efficient Oxygen Reduction Reaction Electrocatalyst

Yan Zhou, Hairong Xue, Tao Wang, Hu Guo, Xiaoli Fan, Li Song, Wei Xia, Hao Gong, Yuping He, Junwei Wang, Jianping He

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

We prepared a non-precious-metal tungsten nitride-cobalt (WN-Co) electrocatalyst anchored in nitrogen-doped ordered porous carbon (NOPC) through an in situ method. The WN-Co/NOPC electrocatalyst possesses good oxygen reduction reaction (ORR) capability in alkaline media, including a high onset potential of −132 mV, a dominant four-electron process, and a superior stability (onset potential and limiting current density were almost unchanged after 5000 cycles in 0.1 m KOH). The improved ORR performance was comparable to that of WN/NOPC and Co/NOPC with regard to three aspects: the even dispersion and uniform size of electrocatalyst particles provide more reactive sites; the nitrogen doping, high specific surface area and highly ordered mesoporous channel of catalyst support (NOPC) are conducive to the infiltration of the electrolyte; the existence of WN reinvests the catalyst with good stability, and the anchored configuration of WN and Co in the NOPC will prevent the particles from agglomerating after a long-term cycle, thereby improving the stability of the catalyst particles.

Original languageEnglish
Pages (from-to)60-66
Number of pages7
JournalChemistry - An Asian Journal
Volume12
Issue number1
DOIs
StatePublished - 3 Jan 2017
Externally publishedYes

Keywords

  • cobalt
  • electrochemistry
  • nanoporous carbon
  • non-precious metal
  • tungsten

Fingerprint

Dive into the research topics of 'Tungsten Nitride-Cobalt Anchored in N-Doped Ordered Porous Carbon as an Efficient Oxygen Reduction Reaction Electrocatalyst'. Together they form a unique fingerprint.

Cite this