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One-Step Scalable Production of Co1− x S/Graphene Nanocomposite as High-Performance Bifunctional Electrocatalyst.
- Source :
- Particle & Particle Systems Characterization; Aug2016, Vol. 33 Issue 8, p569-575, 7p
- Publication Year :
- 2016
-
Abstract
- Herein, a strategy for one-step fabrication of cobalt sulfide/graphene (Co<subscript>1−</subscript> <subscript>x</subscript>S/G) nanocomposite as bifunctional catalyst for oxygen catalysis is demonstrated. The one-step fabrication method involves annealing the mixture of cobalt salt, thioacetamide, and graphene oxide with the assistance of small amount of glycol without any further purification steps. The Co<subscript>1−</subscript> <subscript>x</subscript>S/G shows a morphology with small-sized Co<subscript>1−</subscript> <subscript>x</subscript>S nanocrystals strongly and uniformly anchored on the graphene surface. Systematically electrochemical studies demonstrate that the Co<subscript>1−</subscript> <subscript>x</subscript>S/G with optimized components shows superior catalytic activities toward oxygen reduction and oxygen evolution, which are comparable or even superior to commercial Pt/C and Ir/C catalysts. As a result, the potential hysteresis of Co<subscript>1−</subscript> <subscript>x</subscript>S/G is the lowest among all the samples. The facile operability of the fabrication method and the high bifunctional activity of Co<subscript>1−</subscript> <subscript>x</subscript>S/G may pave one practical way for broad applications including fuel cell, metal-O<subscript>2</subscript> battery, and water electrolysis. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09340866
- Volume :
- 33
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Particle & Particle Systems Characterization
- Publication Type :
- Academic Journal
- Accession number :
- 117420261
- Full Text :
- https://doi.org/10.1002/ppsc.201500242