Microwave Synthesized Three-dimensional Hierarchical Nanostructure CoS2/MoS2 Growth on Carbon Fiber Cloth: A Bifunctional Electrode for Hydrogen Evolution Reaction and Supercapacitor
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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DOI：
10.1016/j.electacta.2016.07.012
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发表时间：
2016-09
影响因子：
6.6
通讯作者：
Can Su;J. Xiang;F. Wen;L. Song;C. Mu;Dongyan Xu;Chunxue Hao;Zhongyuan Liu
中科院分区：
文献类型：
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作者：
Can Su;J. Xiang;F. Wen;L. Song;C. Mu;Dongyan Xu;Chunxue Hao;Zhongyuan Liu
在这项工作中，我们展示了三维分层纳米结构的二硫化钴/二硫化钼生长在碳纤维布（CoS 2/MoS 2/CC）的析氢反应和超级电容器的合成。采用简单的单模微波辅助水热技术，通过两步反应将CoS 2纳米颗粒锚在CC上生长的花状MoS 2纳米片上.结果表明，CoS 2/MoS 2纳米复合材料在CC上均匀分散，CoS 2纳米颗粒被花状MoS 2纳米片包裹。值得注意的是，无粘合剂的CoS 2/MoS 2/CC在1000次循环后保持其活性，并在析氢反应中表现出上级催化活性，具有177 mV的低过电位，以实现10 mA cm− 2的电流密度和66 mV dec−1的塔菲尔斜率。此外，用于超级电容器的双功能CoS 2/MoS 2/CC提供了406 F/g的更高比电容和优异的长寿命循环稳定性，在10000次循环后保持95.27%的初始电容。金属CoS 2和MoS 2之间的协同效应增强了析氢反应和超级电容器性能，从而获得了更多的电化学可及活性位点和更快的电子传输路径。
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. CoS2nanoparticles anchor on flower-like MoS2nanosheets grown on CC by a two-step procedure via facile single mode microwave-assisted hydrothermal technique. It was observed that CoS2/MoS2nanocomposites were uniformly dispersed on CC and CoS2nanoparticles were wrapped by flower-like MoS2nanosheets. 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−2and 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 CoS2and MoS2, moreover more electrochemical accessible active sites and fast electron transport path can be obtained.