Abstract The galvanic displacement reaction between sacrificial PbO2 layers and Fe(II) ions has been carried out in mildly acid acetate solutions. The effect of experimental variables, like morphology of the PbO2 layers, solution pH, temperature and concentration of Fe(II) ions, has been investigated by combining electrochemical methods, SEM-EDS, XRD and XPS. The reaction between PbO2 and Fe(II) ions produced secondary dual layers, consisting of an inner amorphous FeOOH film and an outer crystalline γ-FeOOH deposit, respectively. This peculiar behavior was in contrast with analogous reactions involving other transition metal ions, which yielded only continuous amorphous secondary oxide layers. PbO2/FeOOH layers were tested as anodes for the oxygen evolution reaction in basic media.

中文翻译：

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通过电流置换将 FeOOH 层沉积到多孔 PbO2 上及其作为析氧反应的电催化剂的用途

摘要 PbO2 牺牲层与 Fe(II) 离子之间的电置换反应在弱酸性醋酸盐溶液中进行。通过结合电化学方法、SEM-EDS、XRD 和 XPS，研究了实验变量的影响，如 PbO2 层的形态、溶液 pH 值、温度和 Fe(II) 离子浓度。PbO2 和 Fe(II) 离子之间的反应产生了二次双层，分别由内部非晶 FeOOH 膜和外部结晶 γ-FeOOH 沉积物组成。这种特殊的行为与涉及其他过渡金属离子的类似反应形成对比，后者仅产生连续的无定形二次氧化物层。测试 PbO2/FeOOH 层作为碱性介质中析氧反应的阳极。