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Phase‐Controlled Synthesis of 1T‐MoSe2/NiSe Heterostructure Nanowire Arrays via Electronic Injection for Synergistically Enhanced Hydrogen Evolution
Small Methods ( IF 12.4 ) Pub Date : 2018-10-11 , DOI: 10.1002/smtd.201800317
Xing Zhang 1, 2 , Yang-Yang Zhang 1, 3 , Yun Zhang 1 , Wen-Jie Jiang 1, 2 , Qing-Hua Zhang 4 , Yu-Guo Yang 3 , Lin Gu 2, 4 , Jin-Song Hu 1, 2 , Li-Jun Wan 1, 2
Affiliation  

The crystal phase significantly affects the properties and functions of molybdenum dichalcogenides (MoX2). Phase‐engineered synthesis is challenging for constructing metallic‐phase 1T‐MoX2 for better electrocatalysis than their semiconducting counterparts. Here, 1T‐MoSe2 nanosheet arrays are successfully prepared on metallic NiSe nanowires to couple the synergistic effects of efficient hydrogen formation and water dissociation for hydrogen evolution reaction (HER). Systematic investigations reveal that the electronic injection from NiSe to MoSe2 induces the phase transition from 2H‐ to metallic 1T‐phase. Benefiting from the phase engineering for enhancing intrinsic activity, the heterostructure for synergistically boosting water dissociation—as well as hierarchical 3D catalyst configuration for abundant active sites, efficient electron transport and mass transfer—the obtained shell/core 1T‐MoSe2/NiSe exhibits superior HER activity and durability. Such a strategy paves a new way for fabricating various 1T‐MoX2‐based heterostructures for diverse applications.

中文翻译:

通过电子注入相控合成1T-MoSe2 / NiSe异质结构纳米线阵列,以协同增强氢气的释放

晶相显着影响二硫化钼(MoX 2)的性质和功能。相结构合成对于构建金属相1T-MoX 2相比其半导体对应物具有更好的电催化性具有挑战性。在这里,成功地在金属NiSe纳米线上制备了1T-MoSe 2纳米片阵列,以耦合有效氢形成和水离解以进行氢释放反应(HER)的协同效应。系统研究表明,从NiSe到MoSe 2的电子注入引起从2H-相到金属1T-相的相变。得益于用于增强内在活性的相工程,用于协同促进水离解的异质结构,以及用于丰富活性位点,高效电子传输和传质的分层3D催化剂配置,所获得的壳/核1T-MoSe 2 / NiSe表现出优异的性能。 HER的活动性和耐用性。这种策略为制造用于各种应用的各种基于1T-MoX 2的异质结构开辟了一条新途径。
更新日期:2018-10-11
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