Highly Active Catalyst of Two-Dimensional CoS2/Graphene Nanocomposites for Hydrogen Evolution Reaction

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• 作者：Wei Xing ; Yu Zhang ; Qingzhong Xue ; Zifeng Yan
• 关键词：Hydrogen evolution reaction ; Cobalt disulfide ; Two ; dimensional structure
• 刊名：Nanoscale Research Letters
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：10
• 期：1
• 全文大小：1,866 KB
• 刊物主题：Nanotechnology; Nanotechnology and Microengineering; Nanoscale Science and Technology; Nanochemistry; Molecular Medicine;
• 出版者：Springer US
• ISSN：1556-276X

文摘

Hydrogen evolution reaction (HER) by electrochemical water splitting using new promising non-precious metal catalysts shows great potential for clean energy technology. The design and fabrication of a high-performance electrode material based on cobalt disulfide/reduced graphene oxide (CoS₂/RGO) nanocomposites is reported by a one-step hydrothermal method. Benefiting from its structural advantages, namely, large amount of exposed surface, fast charge transfer, and synergistic effect between CoS₂ and RGO, the as-prepared nanocomposites are exploited as a catalyst for the HER. The results indicate that CoS₂/RGO-5 % exhibits the best performance of hydrogen evolution and the smallest overpotential of 159 mV to achieve a 15 mA cm−2 current density, possessing the easiest releasing of hydrogen gas and the highest charge transfer rate, as well as remarkable stability.