Three-Dimensional Structures of MoS2@Ni Core/Shell Nanosheets Array toward Synergetic Electrocatalytic Water Splitting

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• 作者：Zhicai Xing ; Xiurong Yang ; Abdullah M. Asiri ; Xuping Sun
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：June 15, 2016
• 年：2016
• 卷：8
• 期：23
• 页码：14521-14526
• 全文大小：390K
• 年卷期：0
• ISSN：1944-8252

文摘

Hydrogen evolution reaction (HER) in alkaline media using non-noble metal catalysts with great efficiency represents a critical challenge in current water-alkaline and chlor-alkali electrolyzers. Herein, we demonstrate that the MoS₂@Ni core/shell nanosheets array vertically aligned on carbon cloth (MoS₂@Ni/CC) is a highly active electrocatalyst for HER. In alkaline solutions, MoS₂@Ni/CC needs overpotentials of 91, 118, and 196 mV to approach current densities of 10, 20, and 100 mA cm^–2, respectively, exceeding behavior of commercial Pt/C catalyst at high current densities. Additionally, this catalyst also exhibits excellent electrocatalytic activity toward HER in neutral electrolytes. Such high hydrogen evolution activities are due to synergistic electrocatalytic effects between MoS₂ core and Ni shell.