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NiCoO2@CMK-3 composite with nanosheets-mesoporous structure as an efficient oxygen reduction catalyst
- Source :
- Electrochimica Acta. 294:38-45
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
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.
- Subjects :
- Materials science
General Chemical Engineering
Composite number
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Electrocatalyst
Electrochemistry
01 natural sciences
Hydrothermal circulation
0104 chemical sciences
Catalysis
Chemical engineering
Fuel cells
0210 nano-technology
Mesoporous material
Current density
Subjects
Details
- ISSN :
- 00134686
- Volume :
- 294
- Database :
- OpenAIRE
- Journal :
- Electrochimica Acta
- Accession number :
- edsair.doi...........6da3409fdc4361a16cbe7a769c164841