单层
纳米片
塔菲尔方程
枝晶(数学)
分形维数
氢
催化作用
材料科学
化学工程
化学物理
纳米技术
分形
几何学
化学
物理化学
电化学
有机化学
数学
电极
工程类
数学分析
作者
Shuang Wang,Jing Li,Shanshan Hu,Kun He,Sunwen Zhao,Runhan Xiao,Yanping Sui,Zhiying Chen,Songang Peng,Zhi Jin,Xinyu Liu,Yanhui Zhang,Guanghui Yu
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2022-01-26
卷期号:5 (2): 2273-2279
被引量:14
标识
DOI:10.1021/acsanm.1c03977
摘要
The edge of the 2H-MoS2 phase has good electrocatalytic behavior for hydrogen evolution reaction (HER). However, the shape of monolayer MoS2 synthesized under thermodynamic equilibrium conditions is triangular, which limits the density of catalytic sites at the edge of a crystal domain. The morphology of the edge of monolayer MoS2 grown under non-thermodynamic equilibrium conditions will show a large number of dendrite nanostructures. The abundant dendrite edge nanostructures make it have more catalytic site densities than monolayer MoS2 synthesized under thermodynamic equilibrium conditions. The relationship between MoO3 source supply and MoS2 fractal dimension was established through the simulation of fractal dimension. HER performance showed that the Tafel slope (59 mV/Dec) of dendrite monolayer MoS2 was much lower than that of the triangular sample (97 mV/Dec), which confirmed that the dendrite MoS2 monolayer was more conducive to the application of hydrogen evolution reaction.
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