Boundary activated hydrogen evolution reaction on monolayer MoS2
Boundary activated hydrogen evolution reaction on monolayer MoS2
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单层MoS2的边界活化析氢反应
DOI：
10.1038/s41467-019-09269-9
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发表时间：
2019
影响因子：
16.6
通讯作者：
Zhang Guangyu
中科院分区：
文献类型：
--
作者：
Zhu Jianqi;Wang Zhi Chang;Dai Huijia;Wang Qinqin;Yang Rong;Yu Hua;Liao Mengzhou;Zhang Jing;Chen Wei;Wei Zheng;Li Na;Du Luojun;Shi Dongxia;Wang Wenlong;Zhang Lixin;Jiang Ying;Zhang Guangyu
最近，单层二硫化钼（MoS2）已成为一种有前途且非贵重的析氢反应电催化剂。然而，其性能在很大程度上受到其基面内活性位点密度低和反应性差的限制。在这里，我们报道单层MoS2基面的畴边界可以通过作为活性位点极大地提高其析氢反应性能。研究了两种类型的有效畴界，2H-2H 畴界和 2H-1T 相界。基于这两类域边界的多层次设计，在酸性和碱性条件下实现了优异的析氢反应催化活性、长期稳定性和通用性。我们进一步证明，通过将这种域边界的多层次设计应用于晶圆级单层MoS2薄膜，这种优异的催化剂在大规模上是可行的。
Recently, monolayer molybdenum disulphide (MoS2) has emerged as a promising and non–precious electrocatalyst for hydrogen evolution reaction. However, its performance is largely limited by the low density and poor reactivity of active sites within its basal plane. Here, we report that domain boundaries in the basal plane of monolayer MoS2can greatly enhance its hydrogen evolution reaction performance by serving as active sites. Two types of effective domain boundaries, the 2H-2H domain boundaries and the 2H-1T phase boundaries, were investigated. Superior hydrogen evolution reaction catalytic activity, long-term stability and universality in both acidic and alkaline conditions were achieved based on a multi-hierarchy design of these two types of domain boundaries. We further demonstrate that such superior catalysts are feasible at a large scale by applying this multi-hierarchy design of domain boundaries to wafer-scale monolayer MoS2films.