塔菲尔方程
材料科学
二硫化钼
碳纤维
化学工程
催化作用
钼
球体
乳状液
纳米技术
氢
透射电子显微镜
电催化剂
电化学
电极
复合材料
有机化学
复合数
化学
物理化学
冶金
工程类
物理
天文
作者
Linjing Yang,Weijia Zhou,Jia Lu,Dongman Hou,Yunting Ke,Guoqiang Li,Zhenghua Tang,Xiongwu Kang,Shaowei Chen
出处
期刊:Nano Energy
[Elsevier]
日期:2016-04-01
卷期号:22: 490-498
被引量:261
标识
DOI:10.1016/j.nanoen.2016.02.056
摘要
Highly active and stable MoS2/carbon hierarchical spheres with abundant active edge sites were fabricated by a simple micro-emulsion procedure where PVP was used as the carbon source, and carbon disulfide as the sulfur source and oil phase in micro-emulsion to control the morphology of MoS2. Hierarchical spheres of MoS2/carbon with a diameter of ca. 500 nm were obtained and characterized by scanning and transmission electron microscopic measurements. With a high electrochemically accessible surface area and defect-rich MoS2 nanosheets, the MoS2/carbon hierarchical spheres exhibited an excellent electrocatalytic activity for hydrogen evolution reaction with a low onset potential of −103 mV (vs. RHE), small Tafel of 56.1 mV dec−1, as well as extraordinary catalytic stability. The results were accounted for by the “inverted molybdenum reaction” that served as a novel way of regulating Mo catalytic sites of MoS2 electrocatalysts.
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