Acceleration of Liquid-Solid Redox Reaction with a Magneto-Catalyzed Method
Acceleration of Liquid-Solid Redox Reaction with a Magneto-Catalyzed Method
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磁催化法加速液固氧化还原反应
DOI：
10.1021/acs.jpcc.8b08514
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发表时间：
2018
影响因子：
3.7
通讯作者：
Sheng Zhigao
中科院分区：
文献类型：
--
作者：
Liu Caixing;Yang Yang;Bian Yuecheng;Ma Zongwei;Zhou Chun;Chen Qianwang;Sun Yuping;Sheng Zhigao
加速化学反应是催化化学研究中的一个关键问题。本文以Zn/CuSO 4液-固氧化还原反应为模型体系，提出了一种远距离、非接触的磁催化方法，可以有效地加速该化学反应。区分了外加磁场强度（B）和强度×梯度（B × B）的影响，证实了B的主导作用。光学显微镜和电子显微镜观察表明，随着B的增加，Zn-Cu原电池数量增加，Cu/Cu 2+界面面积增大。结果表明，在8.4T磁场作用下，反应速率提高了22倍，活化能降低了7700 J/mol。这些观察结果提供了一种磁催化的方法来调节化学反应。
To accelerate the chemical reaction is a key issue in the studies of catalytic chemistry. Here, by taking liquid–solid redox reaction Zn/CuSO4as a model system, we present a remote and nontouched magneto-catalyzed method that can accelerate the chemical reaction efficiently. The effects from intensity (B) and intensity × gradient (B∇B) of applied magnetic field are distinguished, and the dominant role played by theBhas been confirmed. WithBincreasing, the more of Zn–Cu galvanic cells and the bigger area of Cu/Cu2+interfacial could be realized via a magnetohydrodynamics effect, which were proved by both optical and electron microscopic observations. It was found that 22 times enhancement of reaction rate and 7700 J/mol reduction of activation energy were achieved when an 8.4 T magnetic field was applied. These observations provide a magneto-catalyzed method to modulate the chemical reaction.