WS2 nanosheets as a highly efficient electrocatalyst for hydrogen evolution reaction
WS2 nanosheets as a highly efficient electrocatalyst for hydrogen evolution reaction
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DOI：
10.1016/j.apcatb.2012.05.013
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发表时间：
2012-08
影响因子：
22.1
通讯作者：
Zhuangzhi Wu;B. Fang;A. Bonakdarpour;Aokui Sun;D. Wilkinson;Dezhi Wang
中科院分区：
文献类型：
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作者：
Zhuangzhi Wu;B. Fang;A. Bonakdarpour;Aokui Sun;D. Wilkinson;Dezhi Wang
以WO3和S为原料，采用机械活化法制备了WS2纳米片（NS），并将其作为析氢反应的电催化剂。所制备的WS2NS显示出单独的NS纳米结构，其片厚度小于10nm。在不同合成条件下的实验结果的基础上，提出了合理的反应过程和形成机理，其中球磨预处理对WS2NSs的形成起着关键作用。由于其独特的结构特征，如松散堆叠的层，提供高度暴露的边缘，特别是边缘，WS2NSs催化剂的大的活性位点，已表现出对HER的高电催化活性，这大大优于常用的MoS2（JDC）催化剂。
Novel nanostructured material WS2nanosheets (NSs) were prepared through a simple and highly reproducible approach, namely, a mechanical activation strategy by using WO3and S as the starting materials, and were explored as electrocatalyst for hydrogen evolution reaction (HER). The as-prepared WS2NSs reveal separate NSs nanostructure with a sheet thickness of less than 10nm. On the basis of experimental results obtained under various synthesis conditions, a reasonable reaction process and formation mechanism is proposed, in which the pre-treatment of ball milling is assumed to play a key role for the formation of WS2NSs. Due to its large active sites originating from its unique structural characteristics such as loosely stacked layers, providing highly exposed rims particularly edges, WS2NSs catalyst has demonstrated high electrocatalytic activity toward HER, which considerably outperforms the commonly used MoS2(JDC) catalyst.