Microwave-Assisted Reactant-Protecting Strategy toward Efficient MoS2 Electrocatalysts in Hydrogen Evolution Reaction

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• 作者：Ning Liu ; Yulin Guo ; Xiaoyun Yang ; Huanlei Lin ; Lichun Yang ; Zhangping Shi ; Zhiwei Zhong ; Sinong Wang ; Yi Tang ; Qingsheng Gao
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：October 28, 2015
• 年：2015
• 卷：7
• 期：42
• 页码：23741-23749
• 全文大小：554K
• ISSN：1944-8252

文摘

The exposure of rich active sites is crucial for MoS₂ nanocatalysts in efficient hydrogen evolution reaction (HER). However, the active (010) and (100) planes tend to vanish during preparation because of their high surface energy. Employing the protection by thiourea (TU) reactant, a microwave-assisted reactant-protecting strategy is successfully introduced to fabricate active-site-rich MoS₂ (AS-rich MoS₂). The bifunctionality of TU, as both a reactant and a capping agent, ensures rich interactions for the effective protection and easy exposure of active sites in MoS₂, avoiding the complicated control and fussy procedure related to additional surfactants and templates. The as-obtained AS-rich MoS₂ presents the superior HER activity characterized by its high current density (j = 68 mA cm^鈥? at 鈭?00 mV vs RHE), low Tafel slope (53.5 mV dec^鈥?) and low onset overpotential (180 mV), which stems from the rich catalytic sites and the promoted conductivity. This work elucidates a feasible way toward high performance catalysts via interface engineering, shedding some light on the development of emerging nanocatalysts.