Preparation of 1T′-Phase ReS2xSe2(1-x) (x=0-1) Nanodots for Highly Efficient Electrocatalytic Hydrogen Evolution Reaction
Preparation of 1T′-Phase ReS2xSe2(1-x) (x=0-1) Nanodots for Highly Efficient Electrocatalytic Hydrogen Evolution Reaction
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DOI：
10.1021/jacs.8b04513
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发表时间：
2018-07-11
影响因子：
15
通讯作者：
Zhang, Hua
中科院分区：
文献类型：
--
作者：
Lai, Zhuangchai;Chaturvedi, Apoorva;Zhang, Hua
作为一种清洁能源，一个可靠的析氢反应（HER）需要强大和高效的催化剂。本研究通过化学气相输运和li插层相结合，制备了一系列1T′相ReS2xSe2(1-x) （x = 0-1）纳米点，在酸性介质中实现了高性能HER。其中，1T′相ReSSe纳米点的析氢活性最高，在电流密度为10 mA cm（-2）时，其Tafel斜率为50.1 mV dec(-1)，过电位低至84 mV。优异的析氢活性是由于高度不对称的1T'晶体结构中的不对称S空位诱导活性位点的最佳吸氢能所致。
As a source of clean energy, a reliable hydrogen evolution reaction (HER) requires robust and highly efficient catalysts. Here, by combining chemical vapor transport and Li-intercalation, we have prepared a series of 1T'-phase ReS2xSe2(1-x) (x = 0-1) nanodots to achieve high-performance HER in acid medium. Among them, the 1T'-phase ReSSe nanodot exhibits the highest hydrogen evolution activity, with a Tafel slope of 50.1 mV dec(-1) and a low overpotential of 84 mV at current density of 10 mA cm(-2). The excellent hydrogen evolution activity is attributed to the optimal hydrogen absorption energy of the active site induced by the asymmetric S vacancy in the highly asymmetric 1T' crystal structure.