The composite electrode of NiCo oxide supported by porous carbon was synthesized for nitrite oxidation and nitrate electro-sorption. The crystal structure and chemical state of the Co and Ni oxyhydroxides which were precipitated on loofah-derived activated carbon (AC) using hypochlorite were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and BET surface area. The voltammetry showed that the redox couple of Co(II)/Co(III) and Ni(II)/Ni(III) as the mediator catalytically transferred the electrons of NO₂^–/NO₃^–; the Ni site had a relatively high transfer coefficient and diffusive current, while the Co site was better in the capacitive removal of the nitrite and nitrate compounds. A batch electrolysis of nitrite ions was operated under constant anodic potential mode (0 to + 1.5 V vs. Ag/AgCl) to assess the performance of the composite electrodes. The adsorption capacity of NiCo/AC (Ni = 5% and Co = 5% on AC by weight) was 23.5 mg-N g⁻¹, which was twice that of AC substrate (7.5 mg-N g⁻¹), based on a multilayer adsorption model. The steady-state kinetics of the consecutive reaction were derived to determine the rate steps of the electrochemical oxidation of NO₂^– and adsorption of NO₃^–.

合成了多孔碳负载的NiCo氧化物复合电极，用于亚硝酸盐氧化和硝酸盐电吸附。利用次氯酸盐在丝瓜衍生的活性炭（AC）上沉淀出的Co和Ni羟基氧化物的晶体结构和化学状态通过X射线衍射（XRD）、扫描电子显微镜（SEM）、X射线光电子能谱（ XPS) 和 BET 表面积。伏安法表明，Co(II)/Co(III)和Ni(II)/Ni(III)的氧化还原电对作为介体催化转移了NO ₂ ^- /NO ₃ ^{-的电子。}; Ni位具有相对较高的传递系数和扩散电流，而Co位在亚硝酸盐和硝酸盐化合物的电容去除方面更好。在恒定阳极电位模式（0 至 + 1.5 V vs. Ag/AgCl）下进行亚硝酸根离子的批量电解，以评估复合电极的性能。NiCo/AC (Ni = 5% and Co = 5% on AC) 的吸附容量为 23.5 mg-N g ^-1，是 AC 底物 (7.5 mg-N g ^-1 ) 的两倍，基于多层吸附模型。推导出连续反应的稳态动力学以确定电化学氧化 NO ₂ ^-和吸附 NO ₃ ^-的速率步骤。