Chinese Journal of Catalysis ›› 2013, Vol. 34 ›› Issue (11): 1992-1997.DOI: 10.1016/S1872-2067(12)60714-1

• Communications • Previous Articles     Next Articles

Performance of polyaniline-derived Fe-N-C catalysts for oxygen reduction reaction in alkaline electrolyte

Xiang-Hui Yan, Gui-Rong Zhang, Bo-Qing Xu   

  1. Innovative Catalysis Program, Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
  • Received:2013-07-20 Revised:2013-09-16 Online:2013-10-18 Published:2013-10-18
  • Contact: Bo-Qing Xu
  • Supported by:

    This work was supported by the National Basic Research Program of China (973 Program, 2013CB933103).

Abstract:

Without the presence of any precious metal, Fe-N-C materials derived from pyrolysis of polyaniline (PANI)/carbon/FeCl3 mixtures are recognized as new catalysts for cathodic oxygen reduction reaction (ORR) in acidic electrolyte. How these Fe-N-C catalysts would perform in an alkaline electrolyte remains yet unknown. Reported here are assessments of the ORR performance of two Fe-N-C catalysts (Fe content: 3.4% and 5.9%) in auqeous KOH by rotating disk electrode methods. Both Fe-N-C catalysts were found much more active than those metal-free N-doped carbon materials in literature. Moreover, the ORR onset and half-wave potentials over both Fe-N-C catalysts were respectively within 60 and 40 mV from those delivered by conventional Pt/C catalyst and both Fe-N-C catalysts even showed much superior catalytic stability in chronoamperometric measurement. ORR on the present Fe-N-C catalysts proceeded predominantly via a four-electron transfer mechanism. This work would shed a light on Fe-N-C materials for ORR catalysis in alkaline fuel cells.

Key words: Iron-nitrogen-carbon, Oxygen reduction reaction, Cathodic catalyst, Polyaniline, Iron-doping, Alkaline electrolyte