Journal
CARBON
Volume 92, Issue -, Pages 64-73Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2015.03.002
Keywords
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Funding
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- National Basic Research Program of China (973 Program) [2012CB825803, 2013CB932702]
- National Natural Science Foundation of China [51422207, 51132006, 21471106]
- Specialized Research Fund for the Doctoral Program of Higher Education [20123201110018]
- Suzhou Planning Project of Science and Technology [ZXG2012028]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Nanocomposites based on transition metal oxides (Co3O4, etc.) and carbon nanostructures with low-cost, high activity and good stability are promising catalysts toward electrochemical water oxidation, which is desirable but remains challenging. Here, we report the design and synthesis of nanocomposite based on carbon quantum dots (CQDs), SnO2 and CO3O4 (CQDs/SnO2-Co3O4) as the electrocatalyst for highly efficient oxygen evolution reaction (OER). In alkaline media, the complex exhibited high electrocatalytic activity and long-term stability, which was better than either pristine Co3O4 or SnO2-Co3O4 composite. Moreover, the CQDs/SnO2-Co3O4 with a molar ratio of Sn:Co at 1:3 revealed the highest catalytic activity toward OER among different molar ratios of CQDs/SnO2-Co3O4 composites. Experimental results indicated that the Co atoms were considered as the active centre, the nano-sized SnO2 enhanced electronic conductivity and the insoluble CQDs layer on the surface effectively protected the catalyst, thus the composite structure resulted in the excellent electrocatalytic activity and high stability. (C) 2015 Published by Elsevier Ltd.
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