Sulfur-Decorated Molybdenum Carbide Catalysts for Enhanced Hydrogen Evolution

详细信息    查看全文

• 作者：Chaoyun Tang ; Wei Wang ; Aokui Sun ; Chengkang Qi ; Dezun Zhang ; Zhuangzhi Wu ; Dezhi Wang
• 刊名：ACS Catalysis
• 出版年：2015
• 出版时间：November 6, 2015
• 年：2015
• 卷：5
• 期：11
• 页码：6956-6963
• 全文大小：517K
• ISSN：2155-5435

文摘

A highly active and stable electrocatalyst (MoS_x@Mo₂C) for hydrogen evolution is developed via the sulfur decoration of molybdenum carbide for the first time. Although the decoration of sulfur reduced the electrochemically active surface area and slightly enlarged the impedance resistance of Mo₂C substrates, the turnover frequency was remarkably enhanced, resulting in a great improvement in the final hydrogen evolution reaction activity. More importantly, there is a synergistic effect between MoS_x and Mo₂C, making the MoS_x@Mo₂C catalyst exhibit an excellent activity with a small Tafel slope of 44 mV dec^鈥?, which is among the best records for Mo₂C-based catalysts.