Amorphous-MoO3−x/MoS2 heterostructure: in situ oxidizing amorphization of S-vacancy MoS2 for enhanced alkaline hydrogen evolution,Chemical Communications

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Amorphous-MoO3−x/MoS2 heterostructure: in situ oxidizing amorphization of S-vacancy MoS2 for enhanced alkaline hydrogen evolution
Chemical Communications ( IF 4.3 ) Pub Date : 2020-10-26 , DOI: 10.1039/d0cc05888b
Wenzhuo Wu _{1,

2,

3,

4} , Chunyao Niu _{2,

4,

5,

6,

7} , Qingyong Tian _{1,

2,

3,

4} , Wei Liu _{1,

2,

3,

4} , Guowei Niu _{1,

2,

3,

4} , Xiaoli Zheng _{1,

2,

3,

4} , Chong Li _{2,

4,

5,

6,

7} , Yu Jia _{2,

4,

5,

6,

7} , Cong Wei _{1,

2,

3,

4} , Qun Xu _{1,

2,

3,

4}

Affiliation

Cost-effective and durable electrocatalysts for the alkaline hydrogen evolution reaction (HER) are urgently required. The slow HER kinetics suppressed by water dissociation hinder the application of catalysts in alkaline media. Herein, we constructed an amorphous heterostructure that combined amorphous-MoO_3−x (A-MoO_3−x) and MoS₂ by in situ oxidizing amorphization of S-vacancy MoS₂. The optimal A-MoO_3−x/MoS₂ catalyst exhibited a competitive HER overpotential of −146 mV at η = −10 mA cm⁻². DFT calculations indicate that A-MoO_3−x can reduce the energy barriers of water dissociation and H₂ formation, and the heterointerfaces can facilitate charge transfer.

中文翻译：

非晶-MoO3-x / MoS2异质结构：S-空位MoS2的原位氧化非晶化，以增强碱性氢的释放

迫切需要用于碱氢逸出反应（HER）的经济高效且耐用的电催化剂。被水离解抑制的缓慢的HER动力学阻碍了催化剂在碱性介质中的应用。在本文中，我们构建的无定形异质该组合的无定形的MoO _{3- X}（A-的MoO _{3- X}）和MoS ₂通过原位S-空位的MoS的氧化非晶化₂。最佳的A-MoO ₃ - _x / MoS ₂催化剂在η = -10 mA cm ^-2时表现出竞争性HER超电势为-146 mV 。DFT计算表明A-MoO ₃ - _x可以减少水离解和H ₂形成的能垒，并且异质界面可以促进电荷转移。

更新日期：2020-11-12

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