期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 6, 期 5, 页码 2212-2218出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta10118j
关键词
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资金
- Ministry of Science and Technology of China [2017YFA0204802, 2017YFB0701601]
- National Natural Science Foundation of China [51761145013, 21673149, 21703145]
- China Postdoctoral Science Foundation [2017M611892]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Fund for Innovative Research Teams of Jiangsu Higher Education Institutions, Jiangsu Key Laboratory for Carbon Based Functional Materials and Devices, Collaborative Innovation Center of Suzhou Nano Science and Technology
Designing and searching high-efficient metal-free oxygen reduction reaction (ORR) catalysts are demanding objectives for academic and industrial researches. Herein, the ORR mechanism of monolayer graphitic germanium carbide (g-GeC) was studied by first-principles calculations. The monolayer g-GeC possesses excellent electro-catalytic properties that originate from the charge redistribution due to electronegativity difference. Adsorption and dissociation of oxygen can easily take place at room temperature, which facilitates the subsequent ORR catalysis. The feasibility and activity of monolayer g-GeC as a cathode catalyst in fuel cells and nonaqueous Li-O-2 batteries were evaluated by plotting free energy diagrams. The calculation results revealed that the g-GeC displays very low overpotentials that are comparable to Pt-based catalysts. This study provides a novel understanding of the electrochemical performance of g-GeC materials, and suggests its great potential as a metal-free ORR catalyst to substitute the traditional Pt-based catalysts.
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