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

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

14 引文 斯高帕斯(Scopus)

摘要

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.

原文英語
頁(從 - 到)11023-11029
頁數7
期刊Journal of Materials Chemistry A
4
發行號28
DOIs
出版狀態已發佈 - 2016

ASJC Scopus subject areas

  • 化學 (全部)
  • 可再生能源、永續發展與環境
  • 材料科學(全部)

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