Metal hydroxides and oxyhydroxides are efficient catalysts for electrochemical oxygen evolution reactions. Herein, we employed a Co-MOF with a tunable structure, high porosity and easy preparation as a precursor to synthesize a bimetal-doped oxyhydroxide/hydroxide electrocatalyst by sequential electrochemical-Lewis acid co-etching and electrosorption doping. This unique co-etching method successfully introduced the high-valent metal ion Hf⁴⁺, as well as the electrosorption efficiently doped Fe³⁺, into the catalyst. Experimental studies and theoretical simulations indicate that the introduction of Hf⁴⁺ optimized the OER kinetics, and the introduction of Fe³⁺ lowered the overpotential. This synthetic strategy of doping high-valent metal ions provides a new avenue for designing high-performance electrocatalysts.

中文翻译：

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电化学合成的双金属掺杂羟基氧化钴/氢氧化物可增强 OER 活性


金属氢氧化物和羟基氧化物是电化学析氧反应的有效催化剂。在此，我们采用结构可调、高孔隙率且易于制备的Co-MOF作为前驱体，通过顺序电化学-路易斯酸共蚀刻和电吸附掺杂合成双金属掺杂的羟基氧化物/氢氧化物电催化剂。这种独特的共刻蚀方法成功地将高价金属离子Hf ⁴⁺ 以及电吸附高效掺杂的Fe ³⁺ 引入到催化剂中。实验研究和理论模拟表明，Hf ⁴⁺ 的引入优化了 OER 动力学，Fe ³⁺ 的引入降低了过电势。这种掺杂高价金属离子的合成策略为设计高性能电催化剂提供了新途径。