The structure-dependent enhancement of the oxygen reduction reaction performance of Co-based low Pt catalysts through Au addition

Zi Jun Lin, Tsung Fu Chou, Chen Wei Liu, Po Hsiang Huang, Yao Zhang Guo, Jeng Han Wang, Kuan Wen Wang

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10 Citations (Scopus)

Abstract

In this study, we have investigated the oxygen reduction reaction (ORR) activity and durability of Co-based catalysts mechanistically. CoPt/C catalysts with a Pt loading of 7 wt% and Au modification have been prepared and shown excellent ORR performance. The various as-prepared CoPt/C and CoPtAu/C catalysts have about 2.6-9.2 times higher mass activity than commercial Pt/C. The mechanistic insight obtained by density functional theory calculations has shown that the enhanced activity is attributable to the fact that Co-based catalysts can easily dissociate surface O2∗ without the high-barrier protonation step and efficiently remove the dissociated O∗. The improved stability, 1000th decay = 14.6%, corresponds to the fact that the core Au can resist the shrinkage of surface Pt during the accelerated durability test.

Original languageEnglish
Pages (from-to)11023-11029
Number of pages7
JournalJournal of Materials Chemistry A
Volume4
Issue number28
DOIs
Publication statusPublished - 2016 Jan 1

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ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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