NiCoO2@CMK-3 composite with nanosheets-mesoporous structure as an efficient oxygen reduction catalyst

Yao Sun, Fei Li, Zichao Shen, Yabei Li, Jinxin Lang, Weimin Li, Guoxin Gao, Shujiang Ding, Chunhui Xiao, Tomokazu Matsue

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Exploiting high efficient non-noble metal catalysts with low-cost and good stability for oxygen reduction reaction (ORR) is vital for fuel cells and metal-air batteries. In this work, we successfully constructed a novel nanosheets-shaped NiCoO2 hierarchical structure supported on CMK-3 support (i.e., NiCoO2@CMK-3 composite) via a facile hydrothermal method. Electrochemical characterization results reveal that the as-prepared NiCoO2@CMK-3 composite exhibits remarkable ORR electrocatalytic activity with a positive peak potential of 0.81 V (vs. RHE), an onset potential of 0.90 V (vs. RHE), a high current density of 4.10 mA cm−2 at 0.4 V, and a nearly four-electron reduction pathway, which are comparable to the state-of-the-art Pt/C catalyst with the same mass. In addition, the NiCoO2@CMK-3 composite possesses excellent methanol-tolerance and electrochemical stability, which are better than Pt/C. The outstanding performance confirms the NiCoO2@CMK-3 composite as a promising efficient ORR catalyst in fuel cells and metal-air batteries.

Original languageEnglish
Pages (from-to)38-45
Number of pages8
JournalElectrochimica Acta
Volume294
DOIs
Publication statusPublished - 2019 Jan 20

Keywords

  • Electrocatalyst
  • Fuel cells
  • NiCoO@CMK-3 composite
  • Oxygen reduction reaction

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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