Synthesis of self-supported non-precious metal catalysts for oxygen reduction reaction with preserved nanostructures from the polyaniline nanofiber precursor

Yang Hu, Xiao Zhao, Yunjie Huang, Qingfeng Li, Niels J. Bjerrum, Changpeng Liu, Wei Xing

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Non-precious metal catalysts (NPMCs) for the oxygen reduction reaction (ORR) are an active subject of recent research on proton exchange membrane fuel cells. In this study, we report a new approach to preparation of self-supported and nano-structured NPMCs using pre-prepared polyaniline (PANI) nanofibers as both nitrogen and carbon precursors. The synthesized NPMCs possess nanoworm structures preserved from the PANI precursor and exhibit high onset potential of 0.905 V vs. RHE and selective activity of nearly four-electron ORR pathways. A significant enhancement in the intrinsic activity and onset potential for the ORR is observed when the Fe content in the precursor is increased from 0 to 3.0 wt.%, while further addition to 10.0 wt.% results in a decrease in the catalytic activity.
Original languageEnglish
JournalJournal of Power Sources
Volume225
Pages (from-to)129-136
ISSN0378-7753
DOIs
Publication statusPublished - 2013

Keywords

  • Oxygen reduction reaction
  • Non-precious metal catalyst
  • Heat-treatment
  • Activity
  • Active site

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