期刊
CHEMICAL COMMUNICATIONS
卷 55, 期 98, 页码 14801-14804出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9cc08439h
关键词
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资金
- Changsha Science and Technology Plan [kq1801065]
- State Key Laboratory Fund
- Hunan Provincial Science and Technology Plan Project [2017TP1001]
- National Key RAMP
- D Program of China [2018YFB0704100]
- State Key Laboratory of Powder Metallurgy of Central South University
- National Natural Science Foundation of China [11764018]
- Equipment Pre-research Foundation
We report carbon nanotube-encapsulated cobalt as an efficient oxygen reduction electrocatalyst (onset potential of 0.94 V and half-potential of 0.84 V). Calculation results firstly reveal that Co protected by graphitic-N-doped carbon holds more negative charge (-1.22 eV) and has an energy barrier (0.56 eV) lower than that of pyridinic-N-doped carbon (-1.11 eV; 0.78 eV), which is responsible for the ORR activity. The corresponding Zn-air batteries deliver an excellent gravimetric energy density of 837 W h kg(-1).
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