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[交流] 【求助】电化学反应的三电极如何变成二电极体系测试固体

电化学反应的是最常用电化工作站！
如何将这样的电化工作站变成二电极体系，用来测试固体样品伏安曲线。

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1楼 2010-12-27 18:34:38

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转载-二电极与三电极的之间的转化使用！但是来测试固体样品伏安曲线仍需解决？

applied potential is required, but this is not possible with a two electrode system, 工作电极总是独立的，对电极和参比电极可以根据具体的情况选择是用一个电极既做参比又做对电极而组成双电极测试系统，或者参比和对电极分开，形成三电极测试系统。

All electrochemical cells require at least two electrodes, since the potential of a given electrode can only be measured relative to another electrode, the potential of which must be constant (a reference electrode). In potentiometric measurements (such as measurement of pH), there is no current through the cell, and these two electrodes are sufficient (it should be noted that many pH and ion-selective electrodes used in potentiometric measurements are combination electrodes – both electrodes are contained within the same body). However, in a cyclic voltammetry experiment, an external potential is applied to the cell, and the current response is measured. Precise control of the external due to the potential drop across the cell due to the solution resistance (potential drop (E) = current (i) x solution resistance (R)) and polarization of the counter electrode that is required to complete the current measuring circuit. Better potential control is achieved using a potentiostat and a three electrode system, in which the potential of one electrode (the working electrode) is controlled relative to the reference electrode, and the current passes between the working electrode and the third electrode (the auxiliary electrode).