Magnetic Enhancement for Hydrogen Evolution Reaction on Ferromagnetic MoS2 Catalyst,Nano Letters

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Magnetic Enhancement for Hydrogen Evolution Reaction on Ferromagnetic MoS2 Catalyst
Nano Letters ( IF 9.6 ) Pub Date : 2020-03-23 , DOI: 10.1021/acs.nanolett.0c00845
Wenda Zhou _{1,

2} , Mingyue Chen ₁ , Manman Guo ₁ , Aijun Hong ₁ , Ting Yu ₁ , Xingfang Luo ₁ , Cailei Yuan ₁ , Wen Lei ₃ , Shouguo Wang ₂

Affiliation

Numerous efforts in improving the hydrogen evolution reaction (HER) performance of transition metal dichalcogenides mostly focus on active sites exposing, vacancy engineering, and phase engineering. However, little room is left for improvement in these approaches. It should be noted that efficient electron transfer also plays a crucial role in catalytic activity. In this work, by employment of an external vertical magnetic field, ferromagnetic bowl-like MoS₂ flakes can afford electrons transmitting easily from a glassy carbon electrode to active sites to drive HER, and thus perform magnetic HER enhancement. The ferromagnetic bowl-like MoS₂ flakes with an external vertical magnetic field can provide a roughly doubled current density compared to that without an external vertical magnetic field at a constant overpotential of −150 mV. Our work may provide a new pathway to break the bottleneck for further improvement of HER performance and also paves the way to utilize the magnetic enhancement in widely catalytic application.

中文翻译：

磁性增强作用于铁磁MoS ₂催化剂上的氢释放反应

在改善过渡金属二卤化氢的放氢反应（HER）性能方面的许多努力主要集中在活性部位暴露，空位工程和相工程上。但是，这些方法的改进空间很小。应当指出，有效的电子转移在催化活性中也起着至关重要的作用。在这项工作中，通过利用外部垂直磁场，铁磁碗状的MoS ₂薄片可以使电子易于从玻璃碳电极传输到活性位点以驱动HER，从而实现磁性HER增强。铁磁性碗状MoS ₂与没有外部垂直磁场的情况相比，外部恒定磁场的薄片在恒定的-150 mV的过电势下可以提供大约两倍的电流密度。我们的工作可能会为突破瓶颈以进一步改善HER性能提供一条新途径，也为在广泛的催化应用中利用磁增强技术铺平了道路。

更新日期：2020-04-24

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