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- Title
One-Step Scalable Production of Co<sub>1−</sub><sub>x</sub> S/Graphene Nanocomposite as High-Performance Bifunctional Electrocatalyst.
- Authors
Xu, Yuqi; Hao, Yongchao; Zhang, Guoxin; Jin, Xiuyan; Wang, Lin; Lu, Zhiyi; Sun, Xiaoming
- Abstract
Herein, a strategy for one-step fabrication of cobalt sulfide/graphene (Co1−xS/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 Co1−xS/G shows a morphology with small-sized Co1−xS nanocrystals strongly and uniformly anchored on the graphene surface. Systematically electrochemical studies demonstrate that the Co1−xS/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 Co1−xS/G is the lowest among all the samples. The facile operability of the fabrication method and the high bifunctional activity of Co1−xS/G may pave one practical way for broad applications including fuel cell, metal-O2 battery, and water electrolysis.
- Subjects
FABRICATION (Manufacturing); COBALT sulfide; NANOCOMPOSITE materials; BIFUNCTIONAL catalysis; ELECTROCATALYSTS; WATER electrolysis
- Publication
Particle & Particle Systems Characterization, 2016, Vol 33, Issue 8, p569
- ISSN
0934-0866
- Publication type
Article
- DOI
10.1002/ppsc.201500242