Corrosion of Electrochemical Energy Materials: Stability Analyses Beyond Pourbaix Diagrams
Corrosion of Electrochemical Energy Materials: Stability Analyses Beyond Pourbaix Diagrams
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DOI：
10.1021/acs.jpcc.3c01727
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发表时间：
2023-06
期刊：
影响因子：
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通讯作者：
Alexandra Zagalskaya;P. Chaudhary;V. Alexandrov
中科院分区：
文献类型：
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作者：
Alexandra Zagalskaya;P. Chaudhary;V. Alexandrov
自首次出现以来，电极电位/溶液pH图（Pourbaix图）一直是分析水溶液中材料腐蚀的一般框架。它们在描述材料的电化学稳定性方面的效用植根于基于平衡热力学的形式主义。然而，电化学能源系统并不总是在热力学平衡条件下运行，并且腐蚀本身是一种固有的不可逆界面过程。在这个角度来看，我们突出了一些代表性的研究主要来自（光）电催化研究，旨在解释动电位极化和瞬时溶解，界面电化学反应，亚稳相的形成和稳定性，应变诱导腐蚀，以及溶解和相变的动力学的影响。一些理论方法，可以帮助解开相关的电化学能量转换应用的条件下的腐蚀机制进行了简要讨论。我们还提倡针对电化学腐蚀的基础科学进行更多的研究工作，这一直被认为是一个不“花哨”的话题。
Since their first appearance, electrode potential/solution pH charts (Pourbaix diagrams) have served as a general framework for the analysis of material corrosion in aqueous solutions. Their utility in describing electrochemical stability of materials is rooted in the equilibrium thermodynamics based formalism. Electrochemical energy systems, however, do not always operate under thermodynamic equilibrium conditions, and corrosion itself is an inherently irreversible interfacial process. In this Perspective, we highlight a number of representative studies drawn primarily from (photo)electrocatalysis research and aimed to account for the effects of potentiodynamic polarization and transient dissolution, interfacial electrochemical reactions, formation and stability of metastable phases, strain-induced corrosion, as well as the kinetics of dissolution and phase transformations. Some theoretical approaches that can help disentangle corrosion mechanisms under conditions relevant to electrochemical energy conversion applications are briefly discussed. We also advocate for more research efforts directed at the basic science of electrochemical corrosion that has long been deemed as a not “fancy” topic.