RuO_x is a promising electrocatalyst for the hydrogen evolution reaction (HER), but it suffers from competition between *OH and *H adsorption and the over-binding effect of H on the RuO_x surface. FeOOH features strong oxophilicity, making it expectedly form RuO_x/FeOOH composite to efficiently catalyze HER. Considering the strong oxidability of Ru³⁺, it is desirable to design a moderate environment to form a RuO_x/FeOOH composite with a homogeneous structure and accessible Ru sites. Herein, an ethanol-regulated corrosion strategy was developed to in-situ grow RuO_x/FeOOH electrocatalyst on iron foam. To avoid the violent redox reaction, the coordination of hydroxyl groups in ethanol with Ru³⁺ reduces the oxidability and postpones the diffusion of Ru³⁺ ions. The prepared catalyst exhibited a low over-potential of 67 mV at 50 mA cm⁻² and excellent water-splitting properties requiring 1.56 V at 100 mA cm⁻² due to the optimized structure and the strong electron interaction between RuO_x and FeOOH. According to the modulation mechanism of hydroxyl groups, ethylene glycol, n-propanol, isopropanol, and methanol are substitutable for ethanol to boost the HER activity of RuO_x/FeOOH. This work proposes a coordination-regulation approach for preparing Ru-based composite catalysts with enhanced HER performance by adjusting iron corrosion behaviors.

RuO _{x是一种很有前途的析氢反应 (HER) 电催化剂，但它存在 *OH 和 *H 吸附之间的竞争以及 H 在 RuO x}表面上的过结合效应。FeOOH具有很强的亲氧性，有望形成RuO _x /FeOOH复合材料以高效催化HER。^{考虑到Ru 3+}的强氧化性，需要设计适度的环境以形成结构均匀且Ru位点可及的RuO _{x /FeOOH复合材料。}在此，开发了一种乙醇调节的腐蚀策略以原位生长 RuO _x/FeOOH 电催化剂在铁泡沫上。为了避免剧烈的氧化还原反应，乙醇中的羟基与Ru ^{3+的配位降低了氧化性并延缓了Ru 3+}离子的扩散。由于优化的结构和 RuO _x与 FeOOH之间的强电子相互作用，所制备的催化剂在 50 mA cm ^-2时表现出 67 mV 的低过电位和在 100 mA cm ^-2时需要 1.56 V 的优异水分解性能。根据羟基的调节机制，乙二醇、正丙醇、异丙醇和甲醇可替代乙醇以提高RuO _{x的HER活性}/FeOOH。这项工作提出了一种配位调节方法，通过调节铁的腐蚀行为来制备具有增强 HER 性能的 Ru 基复合催化剂。