Microwave Synthesized Three-dimensional Hierarchical Nanostructure CoS₂/MoS₂ Growth on Carbon Fiber Cloth: A Bifunctional Electrode for Hydrogen Evolution Reaction and Supercapacitor

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• 作者：Can Su^a ; Jianyong Xiang^a ; Fusheng Wen^a ; ^{wenfsh03@126.com" class="auth_mail" title="E-mail the corresponding author} ; Laizhou Song^b ; Congpu Mu^c ; Dongyang Xu^a ; Chunxue Hao^a ; Zhongyuan Liu^a ; ^{liuzy0319@yahoo.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：MoS2 ; CoS2 ; hydrogen evolution reaction ; supercapacitor
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：10 September 2016
• 年：2016
• 卷：212
• 期：Complete
• 页码：941-949
• 全文大小：4542 K

文摘

In this work, we demonstrate the synthesis of three-dimensional hierarchical nanostructured cobalt disulfide/molybdenum disulfide growth on carbon fiber cloth (CoS₂/MoS₂/CC) for hydrogen evolution reaction and supercapacitor. CoS₂ nanoparticles anchor on flower-like MoS₂ nanosheets grown on CC by a two-step procedure via facile single mode microwave-assisted hydrothermal technique. It was observed that CoS₂/MoS₂ nanocomposites were uniformly dispersed on CC and CoS₂ nanoparticles were wrapped by flower-like MoS₂ nanosheets. Remarkably, the binder-free CoS₂/MoS₂/CC maintains its activity after 1000 cycles and exhibits superior catalytic activity in hydrogen evolution reaction, with a low overpotential of 177 mV to achieve current density of 10 mA cm⁻² and a Tafel slope of 66 mV dec⁻¹. Furthermore, the bifunctional CoS₂/MoS₂/CC for supercapacitor delivers a higher specific capacitance of 406 F/g and excellent long-life cycling stability, retaining 95.27% of the initial capacitance after 10000 cycles. The enhanced hydrogen evolution reaction and supercapacitor property may be ascribed to the synergistic effect between metallic CoS₂ and MoS₂, moreover more electrochemical accessible active sites and fast electron transport path can be obtained.