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Magnetocatalysis: The Interplay between the Magnetic Field and Electrocatalysis
CCS Chemistry ( IF 11.2 ) Pub Date : 2021-08-11 , DOI: 10.31635/ccschem.021.202100991
Guowei Li 1 , Qun Yang 1 , Kaustuv Manna 2 , Qingge Mu 1 , Chenguang Fu 3 , Yan Sun 1 , Claudia Felser 1
Affiliation  

Magnetic fields are known as clean, economic, and effective tools to modify band and magnetic structures of materials. When coupled with catalytic processes such as the hydrogen evolution reaction (HER), they have the potential to control catalytic efficiency. Herein, we studied the magnetic response of a series of materials as HER catalysts, specifically ferromagnetic Co2VGa, Co2MnGa, and Ni, ferrimagnetic Mn2CoGa, and paramagnetic Pt. We found that all the Heusler compounds exhibit impressively high intrinsic activity. Most importantly, the presence of a magnetic field can change the HER efficiency significantly, regardless of the magnetic state of the catalyst. We observed boosting HER kinetics for ferromagnetic Ni and paramagnetic Pt, and a decrease of efficiency for ferro/ferrimagnetic Heusler alloys. Our calculations suggest that the binding energy between the reaction intermediate and the catalyst can be tailored effectively by controlling the number of transferred electrons. These findings highlight the vital role of magnetic fields in tailoring heterogeneous catalytic reactions that involve adsorption of reactants.



中文翻译:

磁催化:磁场和电催化之间的相互作用

磁场是众所周知的清洁、经济和有效的工具,可以改变材料的能带和磁结构。当与析氢反应 (HER) 等催化过程结合使用时,它们有可能控制催化效率。在此,我们研究了一系列材料作为 HER 催化剂的磁响应,特别是铁磁 Co 2 VGa、Co 2 MnGa 和 Ni、亚铁磁 Mn 2CoGa 和顺磁性 Pt。我们发现所有 Heusler 化合物都表现出令人印象深刻的高内在活性。最重要的是,无论催化剂的磁性状态如何,磁场的存在都可以显着改变 HER 效率。我们观察到铁磁 Ni 和顺磁 Pt 的 HER 动力学增强,以及铁/亚铁磁 Heusler 合金的效率降低。我们的计算表明,通过控制转移电子的数量,可以有效地调整反应中间体和催化剂之间的结合能。这些发现强调了磁场在定制涉及反应物吸附的多相催化反应中的重要作用。

更新日期:2021-08-12
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