Abstract Although the existence of short-lived univalent magnesium cation (Mg+) was supposed to play an important role on negative difference effect (NDE) during anodic dissolution of magnesium in previous work, no direct proof of the existence of Mg+ has ever been reported. Here, a modified substrate generation/tip collection mode of scanning electrochemical microscopy was applied to detect Mg+ via the reaction of generated Mg+ and potassium ferricyanide (K3[Fe(CN)6]). Based on the new design method and experimental data, our studies provide a direct evidence of the presence of Mg+ in aqueous solution combining with open circuit and polarization condition, which is benefit to understand NDE.

中文翻译：

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单价镁阳离子的电化学检测：镁阳极溶解过程中负差异效应的可能解释

摘要 虽然在以前的工作中，短寿命的一价镁阳离子 (Mg+) 的存在被认为在镁阳极溶解过程中的负差效应 (NDE) 中起重要作用，但尚未有直接证明存在 Mg+ 的报道。在这里，通过生成的 Mg+ 和铁氰化钾 (K3[Fe(CN)6]) 的反应，应用了一种改进的扫描电化学显微镜的基底生成/尖端收集模式来检测 Mg+。基于新的设计方法和实验数据，我们的研究提供了水溶液中存在 Mg+ 结合开路和极化条件的直接证据，这有利于理解 NDE。