Promotional effect of phosphorus doping on the activity of the Fe-N/C catalyst for the oxygen reduction reaction

Yang Hu, Jianbin Zhu, Qing Lv, Changpeng Liu, Qingfeng Li, Wei Xing

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Cost-effective, active and stable electrocatalysts for the oxygen reduction reaction (ORR) are highly desirable for the wide-spread adoption of technologies such as fuel cells and metal-air batteries. Among the already reported non-precious metal catalysts, carbon-supported transition metal-nitrogen complexes, i.e., M-N/C catalysts, are the most promising candidate. Herein, by comparing the ORR activities of standard Fe-N/C catalysts synthesized with or without the doped phosphorus species, the promotional effect of phosphorus doping is discerned. Such phosphorus doping is achieved by using an acidic phosphate ester as a dopant in the synthesis, which introduces no change in catalyst morphologies and structures. The linked structure of phosphate ester cations with the nitrogen precursor, i.e., polyaniline chain, is favored for the evenly P doping of the catalyst, showing to a superior ORR activity to that for the undoped Fe-N/C catalyst. The activity and durability of the catalysts are demonstrated in direct methanol fuel cells.
Original languageEnglish
JournalElectrochimica Acta
Volume155
Pages (from-to)335-340
Number of pages6
ISSN0013-4686
DOIs
Publication statusPublished - 2015

Keywords

  • Catalyst
  • Heat-treatment
  • Non-precious metal
  • Oxygen reduction reaction
  • Phosphorus
  • Catalysts
  • Cost effectiveness
  • Direct methanol fuel cells (DMFC)
  • Doping (additives)
  • Electrocatalysts
  • Electrolytic reduction
  • Esterification
  • Esters
  • Fuel cells
  • Heat treatment
  • Iron compounds
  • Metals
  • Methanol fuels
  • Nitrogen
  • Oxygen
  • Polyaniline
  • Precious metals
  • Secondary batteries
  • Synthesis (chemical)
  • Transition metals
  • Catalyst morphology
  • Metal-air battery
  • Non-precious metal catalysts
  • Non-precious metals
  • Phosphorus species
  • Polyaniline chains
  • Promotional effect
  • Catalyst activity

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