The atomic origin of nickel-doping-induced catalytic enhancement in MoS2 for electrochemical hydrogen production
The atomic origin of nickel-doping-induced catalytic enhancement in MoS2 for electrochemical hydrogen production
复制标题
MoS2 中镍掺杂诱导催化增强电化学产氢的原子起源
DOI：
10.1039/c8nr10023c
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发表时间：
2019
期刊：
影响因子：
6.7
通讯作者：
Chen Mingwei
中科院分区：
文献类型：
--
作者：
Luo Ruichun;Luo Min;Wang Ziqian;Liu Pan;Song Shuangxi;Wang Xiaodong;Chen Mingwei
过渡金属（TM）掺杂已被证明是提高二硫化钼（MoS2）用于能量储存和转化的催化活性的有效方式，特别是对于析氢反应（HER）。真实空间可视化的Ni掺杂的二硫化钼的原子结构是至关重要的，以了解杂原子在增强电催化的作用。利用像差校正扫描透射电子显微镜（STEM），我们发现，Ni掺杂剂占据钼位的二硫化钼合成一锅水热法。单原子Ni掺杂剂的这种选择性占据导致MoS2的催化惰性基面的显著晶格畸变和电子结构改性，这是MoS2在酸性和碱性溶液中增强HER催化的原因。
Transition metal (TM) doping has been demonstrated to be an efficacious way to boost the catalytic activity of molybdenum disulfide (MoS2) for energy storage and conversion, especially for the hydrogen evolution reaction (HER). Real-space visualization of the atomic structure of Ni doped MoS2 is crucial to understand the role of heteroatoms in enhancing electrocatalysis. By utilizing aberration corrected scanning transmission electron microscopy (STEM), we found that Ni dopants occupy Mo sites in MoS2 synthesized by a one-pot hydrothermal method. Such selective occupation of the single-atom Ni dopants leads to significant lattice distortion and electronic structure modification of the catalytically inert basal planes of MoS2, which are responsible for the enhanced HER catalysis of MoS2 in both acidic and alkaline solutions.