期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 16, 期 46, 页码 25350-25357出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cp04119d
关键词
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资金
- National Basic Research Program of China (973 Program) [2012CB825800, 2013CB932702]
- National Natural Science Foundation of China (NSFC) [51132006, 51422207, 21471106]
- Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Suzhou Planning Project of Science and Technology [ZXG2012028]
The porous cobalt, nitrogen-codoped carbon materials (Co/N/C) were synthesized by a facile one-step pyrolysis of vitamin B12 (VB12) and carbon quantum dots (CQDs). Varying the initial mass ratio of CQDs and VB12 leads to controllable concentrations of Co (0% to 3.68%) and N (0% to 5.88%) after pyrolysis. The obtained Co/N/C was evaluated by oxygen reduction reaction (ORR) in both alkaline and acid media. Particularly, the Co/N/C with 1.12% Co and 2.92% N prepared at 700 degrees C (Co-1.12/N-2.92/C-700) exhibited the best catalytic ability for ORR with a cathodic peak at -0.165 and 0.185 V (vs. SCE) in 0.1 M KOH and 0.1 M HClO4 solution, respectively, which are comparable to that of Pt/C (20%). The Co-1.12/N-2.92/C-700 also showed long-term stability and high methanol tolerance, which outperformed commercial Pt/C (20%).
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