4.6 Article

Facile loading mesoporous Co3O4 on nitrogen doped carbon matrix as an enhanced oxygen electrode catalyst

Journal

MATERIALS LETTERS
Volume 244, Issue -, Pages 78-82

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2019.01.144

Keywords

Post-grinding process; Nanocomposites; Porous materials; Synergistic effect; Bi-functional catalysts

Funding

  1. Program for Fund of State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications, China)
  2. Key Laboratory of Silicon Device Technology, Chinese Academy of Sciences
  3. National Natural Science Foundation of China [61874014, 61874013, 51572032, 61674019, 61574020, 51472221, 51472033, 51472196]

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A nanocomposite with mesoporous Co3O4 loaded on nitrogen-doped mesoporous carbon (Co3O4@NMC) has been constructed by a facile post-grinding process. The electro-catalytic experimental results show that Co3O4@NMC (1:3) can be regarded as the low-cost alternative ORR/OER bi-functional catalyst compared with commercial noble Pt/C + IrO2 catalysts. The potential difference (Delta E) between between E-1/2 and E-j10 for Co3O4@NMC (1:3) sample is only 21 mV larger. Moreover, we observed no obvious degeneration in both ORR and OER activity during ADT tests. The enhancement of electro-catalytic activity can be attributed to the effective charge transfer process as suggested by the Tafel analysis due to the synergistic effect. (C) 2019 Elsevier B.V. All rights reserved.

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