NiCoO2@CMK-3 composite with nanosheets-mesoporous structure as an efficient oxygen reduction catalyst
| Autor: | Weimin Li, Shujiang Ding, Fei Li, Yabei Li, Guoxin Gao, Tomokazu Matsue, Jinxin Lang, Zichao Shen, Yao Sun, Chunhui Xiao |
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| Rok vydání: | 2019 |
| Předmět: |
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 |
| Zdroj: | Electrochimica Acta. 294:38-45 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2018.10.060 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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