Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 28, Issue 9, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201705094
Keywords
electrospinning; nanofibers; N-doped carbon; NiCo alloy nanoparticles; oxygen catalysts
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Funding
- National Natural Science Foundation of China [21673153, 21303114, 51272167, 51572181]
- National Key Research and Development Program of China [2016YFB0100200]
- Natural Science Foundation of the Higher Education Institutions of Jiangsu Province, China [15KJB480001]
- Natural Science Foundation of Jiangsu Province, China [BK20161207]
- China Postdoctoral Science Foundation [2017M611894]
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The exploring of catalysts with high-efficiency and low-cost for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is one of the key issues for many renewable energy systems including fuel cells, metal-air batteries, and water splitting. Despite several decades pursuing, bifunctional oxygen catalysts with high catalytic performance at low-cost, especially the one that could be easily scaled up for mass production are still missing and highly desired. Herein, a hybrid catalyst with NiCo alloy nanoparticles decorated on N-doped carbon nanofibers is synthesized by a facile electrospinning method and postcalcination treatment. The hybrid catalyst NiCo@N-C2 exhibits outstanding ORR and OER catalytic performances, which is even surprisingly superior to the commercial Pt/C and RuO2 catalysts, respectively. The synergetic effects between alloy nanoparticles and the N-doped carbon fiber are considered as the main contributions for the excellent catalytic activities, which include decreasing the intrinsic and charge transfer resistances, increasing C=C, graphitic-N/pyridinic-N contents in the hybrid catalyst. This work opens up a new way to fabricate high-efficient, low-cost oxygen catalysts with high production.
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