Hollow Structured Micro/Nano MoS2 Spheres for High Electrocatalytic Activity Hydrogen Evolution Reaction

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• 作者：Bangjun Guo ; Ke Yu ; Honglin Li ; Haili Song ; Yuanyuan Zhang ; Xiang Lei ; Hao Fu ; Yinghua Tan ; Ziqiang Zhu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：March 2, 2016
• 年：2016
• 卷：8
• 期：8
• 页码：5517-5525
• 全文大小：580K
• ISSN：1944-8252

文摘

Molybdenum disulfide (MoS₂) has attracted extensive attention as a non-noble metal electrocatalyst for hydrogen evolution reaction (HER). Controlling the skeleton structure at the nanoscale is paramount to increase the number of active sites at the surface. However, hydrothermal synthesis favors the presence of the basal plane, limiting the efficiency of catalytic reaction. In this work, perfect hollow MoS₂ microspheres capped by hollow MoS₂ nanospheres (hH-MoS₂) were obtained for the first time, which creates an opportunity for improving the HER electrocatalytic performance. Benefiting from the controllable hollow skeleton structure and large exposed edge sites, high-efficiency HER activity was obtained for stacked MoS₂ thin shells with a mild degree of disorder, proving the presence of rich active sites and the validity of the combined structure. In general, the obtained hollow micro/nano MoS₂ nanomaterial exhibits optimized electrocatalytic activity for HER with onset overpotential as low as 112 mV, low Tafel slope of 74 mV decade^–1, high current density of 10 mA cm^–2 at η = 214 mV, and high TOF of 0.11 H₂ s^–1 per active site at η = 200 mV.