Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 5, Issue 6, Pages 5341-5350Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b00655
Keywords
Fuel cells; Oxygen reduction reaction (ORR); Cobalt and nitrogen coembedded; 3D Trumpet flower-like structure; Catalytic activity
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Funding
- National Nature Science Foundation of China [51474255]
- Hunan Provincial Science and Technology Plan Project, China [2016TP1007]
- Fundamental Research Funds for the Central Universities of Central South University [2017zzts114]
- Open End Fund for the Graduate Student Research Innovation Project of Hunan Province [150140008]
- open research Fund Program of Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring (Central South University), Ministry of Education
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Developing highly cost-effective catalysts for an oxygen reduction reaction (ORR) in fuel cells is highly significant but still full of challenges. In this work, cobalt- and nitrogen-coembedded three-dimensional (3D) trumpet flower-like porous carbons (CoNC) have been prepared by a simple two-step self-assembly technique, using carbon quantum dots (CQDs) as the carbon precursor and a supermolecular gel of self-assembled melamine and Co2+ ions as the nitrogen and cobalt sources. The resultant CoNC catalysts possess unique 3D trumpet flower-like structures, efficient charge transfer ability, and abundant Co-N-x active sites. As a catalyst for ORR, the optimized CoNC-800 (pyrolyzed at 800 degrees C) exhibits efficient electrocatalytic activities, longer-term stability, and strong endurance to methanol both in acidic and alkaline media. It can be worked as a prospective substitute for a commercial Pt/C catalyst for ORR in the widespread implementation of fuel cells.
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