Phase Engineering of W-Doped MoS2 by Magneto-Hydrothermal Synthesis for Hydrogen Evolution Reaction,Small

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Phase Engineering of W-Doped MoS2 by Magneto-Hydrothermal Synthesis for Hydrogen Evolution Reaction
Small ( IF 13.0 ) Pub Date : 2023-08-01 , DOI: 10.1002/smll.202303646
Changdian Li _{1,

2} , Lili Zhu _{1,

2} , Ziqiang Wu _{1,

2} , Qian Chen _{1,

2} , Ruobing Zheng _{1,

2} , Jie Huan _{1,

2} , Yanan Huang ₁ , Xuebin Zhu ₁ , Yuping Sun _{1,

3,

4}

Affiliation

Molybdenum disulfide (MoS₂) has been proved as an excellent potential hydrogen evolution reaction (HER) catalyst. Compared with thermodynamically stable 2H-MoS₂, 1T-MoS₂ exhibits higher conductivity and catalytic activity, whereas it is usually difficult to prepare since of thermodynamically metastable. Herein, a feasible method is reported to fabricate ambient-stable MoS₂ with high concentration 1T phase through magnetic free energy synergistic microstrain induced by W doping under low magnetic field. The 1T phase proportion in MoS₂ can be as high as 80% and is ambient-stable for more than one year. The catalyst prepared under a magnetic field of 3 T delivers an overpotential of 195 mV at a current density of 10 mA cm⁻² and has a long-term stability over 50 h. This work provides a novel strategy for preparation of MoS₂ with high 1T concentration and high stability.

中文翻译：

磁水热合成 W 掺杂 MoS2 析氢反应相工程

二硫化钼（MoS2 _）已被证明是一种优异的潜在析氢反应（HER）催化剂。与热力学稳定的2H-MoS ₂相比，1T-MoS ₂表现出更高的电导率和催化活性，但由于热力学亚稳态，通常难以制备。本文报道了一种可行的方法，通过低磁场下W掺杂诱导的磁自由能协同微应变来制备具有高浓度1T相的环境稳定MoS _{2 。}_{MoS 2}中的1T相比例可高达80%，并且环境稳定时间超过一年。在3 T磁场下制备的催化剂在10 mA cm ^-2的电流密度下表现出195 mV的过电位，并且具有超过50 h的长期稳定性。该工作为制备高1T浓度、高稳定性的MoS ₂提供了一种新的策略。

更新日期：2023-08-01

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