A paired electrochemical refinery toward the cathodic nitrate reduction reaction (NO₃RR) and anodic glycerol oxidation reaction (GOR) driven by renewable electricity could generate high value-added ammonia and formic acid simultaneously. However, both cathode and anode electrocatalysts often suffer from low efficiency and unclear reconstruction. Herein, we prepare a non-noble NiCu–OH nanocomposite precatalyst composed of crystalline Cu₂(OH)₃(NO₃) and amorphous Ni(OH)₂, which can be reconstructed into high-activity and stable cathodic NO₃RR and anodic GOR electrocatalysts under operating conditions. Various in situ and ex situ experiments demonstrate that NiCu–OH could convert into active Cu nanoparticles coupled with amorphous Ni(OH)₂ under cathodic NO₃RR conditions. Meanwhile, under anodic GOR conditions, NiCu–OH-derived bimetal oxide (NiCuO) changes into active NiOOH species composited with Cu vacancy-rich CuO. Furthermore, an actual paired electrochemical refinery with the reconstructed NiCu-based catalysts toward the NO₃RR and GOR shows a low potential of 1.37 V at a current density of 100 mA cm⁻² to continuously produce ammonium and formate. This study provides a new paradigm for the design of an electrochemical refinery with reconstructed non-noble electrocatalysts toward chemical upgradation.

中文翻译：

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用于配对电化学精炼的重构诱导 NiCu 基催化剂

_{由可再生电力驱动的阴极硝酸盐还原反应（NO 3} RR）和阳极甘油氧化反应（GOR）的配对电化学炼油厂可以同时产生高附加值的氨和甲酸。然而，阴极和阳极电催化剂通常都存在效率低和重构不明确的问题。_{在此，我们制备了一种由结晶Cu 2} (OH) ₃ (NO ₃ ) 和无定形Ni(OH) ₂组成的非贵金属NiCu-OH纳米复合预催化剂，可将其重构为高活性且稳定的阴极NO ₃ RR和阳极运行条件下的 GOR 电催化剂。各种原位和异位实验表明，在阴极 NO ₃ RR 条件下，NiCu-OH 可以转化为与无定形 Ni(OH) _{2偶联的活性 Cu 纳米颗粒。}同时，在阳极 GOR 条件下，NiCu-OH 衍生的双金属氧化物 (NiCuO) 转变为与富含 Cu 空位的 CuO 复合的活性 NiOOH 物种。_{此外，一个实际配对的电化学精炼厂与针对 NO 3} RR 和 GOR的重构 NiCu 基催化剂在 100 mA cm ^-2的电流密度下显示出 1.37 V 的低电位，以连续生产铵和甲酸盐。该研究为电化学精炼厂的设计提供了一种新的范式，该精炼厂采用重构的非贵金属电催化剂进行化学升级。