Journal
JOURNAL OF POWER SOURCES
Volume 330, Issue -, Pages 132-139Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.09.001
Keywords
Cobalt diselenide; Graphitic carbon; Hybrid composites; Electrocatalysis; Oxygen reduction reaction
Funding
- Research Grant for Talent Introduction of Fudan University, China [JIH2021001]
- National Natural Science Foundation of China [51672049, 51102278]
- Ministry of Education - Singapore (Academic Research Fund TIER 1) [RG128/14]
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Highly efficient and cost-effective electrocatalyst for the oxygen reduction reaction (ORR) is crucial for a variety of renewable energy applications. Herein, strongly coupled hybrid composites composed of cobalt diselenide (CoSe2) nanoparticles embedded within graphitic carbon polyhedra (GCP) as high-performance ORR catalyst have been rationally designed and synthesized. The catalyst is fabricated by a convenient method, which involves the simultaneous pyrolysis and selenization of preformed Co-based zeolitic imidazolate framework (ZIF-67). Benefiting from the unique structural features, the resulting CoSe2/GCP hybrid catalyst shows high stability and excellent electrocatalytic activity towards ORR (the onset and half-wave potentials are 0.935 and 0.806 V vs. RHE, respectively), which is superior to the state-of-the-art commercial Pt/C catalyst (0.912 and 0.781 V vs. RHE, respectively). (C) 2016 Elsevier B.V. All rights reserved.
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