In this work, the use of atomic emission spectroelectrochemistry (AESEC) coupled to electrochemical impedance spectroscopy (EIS) is presented as a method of revealing dissolution mechanisms. To illustrate the method, the dissolution kinetics of Al cations from an Al-Zn pure phase (Zn-68 wt.% Al) was investigated in an alkaline solution. In the cathodic potential domain, a nearly direct formation of dissolved Al³⁺ was observed, while in the anodic potential domain the Al dissolution occurred by migration across a ZnO/Zn(OH)₂ film. It was demonstrated that this methodology can be applied to a nonstationary system during a potentiostatic experiment for a lower Al content phase (Zn-22 wt.% Al). The nature of the charge transfer mechanisms depended on the applied potential and could be identified by comparing the direct current and alternating current faradaic yield using AESEC-EIS.

在这项工作中，提出了使用原子发射光谱电化学（AESEC）耦合电化学阻抗谱（EIS）作为揭示溶解机理的方法。为了说明该方法，在碱性溶液中研究了Al阳离子从Al-Zn纯相（Zn-68 wt。％Al）的溶解动力学。在阴极电位域中，观察到几乎直接形成了溶解的Al ³⁺，而在阳极电位域中，Al的溶解通过在ZnO / Zn（OH）_2上的迁移而发生电影。结果表明，该方法可在恒电位实验中用于较低Al含量相（Zn-22 wt。％Al）的非平稳系统。电荷转移机制的性质取决于所施加的电势，可以通过使用AESEC-EIS比较直流电和交流法拉第发电量来确定。