It is still a challenge to develop electrocatalyst for the efficient adsorption and conversion of organic molecule in aqueous media. Herein, a hetero‐interface structure based on CuO@Ni(OH)2 is rationally designed to enhance the performance of benzyl alcohol oxidation to benzoic acid. A high Faradaic efficiency of 99% and the yield of 3.09 mmol cm−2 h−1 are achieved at 1.70 V versus reversible hydrogen electrode, outperforming the previously reported electrocatalysts. Furthermore, a membrane‐free flow electrolyzer was assembled based on CuO@Ni(OH)2 hetero‐interface, exhibiting a much high yielding of benzoic acid (6.73 mmol cm−2 h−1) and hydrogen (0.35 L cm−2 h−1) with excellent stability. Both experimental data and density functional theory calculations verify that the electron is tend to accumulate at the hetero‐interface, thus accelerating the adsorption of reactant and intermediate and reducing the energy barrier of the conversion of benzyl alcohol to benzoic acid.

中文翻译：

---

通过异质界面结构引导苯甲醇电氧化与析氢

开发用于水介质中有机分子的高效吸附和转化的电催化剂仍然是一个挑战。本文中，基于CuO@Ni(OH)的异质界面结构2合理设计，提高了苯甲醇氧化成苯甲酸的性能。法拉第效率高达 99%，产量为 3.09 mmol cm−2H−1与可逆氢电极相比，在 1.70 V 电压下实现，优于之前报道的电催化剂。此外，基于CuO@Ni(OH)组装了无膜流动电解槽2异质界面，表现出很高的苯甲酸产率（6.73 mmol cm−2H−1）和氢气（0.35 L cm−2H−1）具有优异的稳定性。实验数据和密度泛函理论计算都证实电子倾向于在异质界面处积累，从而加速反应物和中间体的吸附，降低苯甲醇转化为苯甲酸的能垒。