A Cu/GO/Ti electrode was prepared by electrodeposition for removal of nitrate by means of the electrochemical reduction. The structure, morphology and characteristics of the electrode were characterized by scanning electron microscopy (SEM), Raman spectroscopy (RS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical workstation, and Cu/GO/Ti was used as the cathode to remove nitrate in water by electrochemical process. Characterization results indicated that GO was successfully deposited on the Ti plate and it was partially reduced to reduced graphene. Dendritic and granular Cu particles are agglomerated on the surface of GO layer by chemical interaction in the form of metallic Cu, Cu₂O and CuO, and the dendrite Cu layer increased the specific surface area of Cu layer. The addition of GO layer increases the electroreduction activity for nitrate. Furthermore, through comparison with Cu/Ti electrode, Cu/GO/Ti electrode improved the percentage of nitrate removal from 78.8% to 91.5%, and energy consumption decreased from 0.82 to 0.47 kW h/g NO₃⁻-N. The present results showed the promising application of GO-based electrodes with Cu in electrocatalytic nitrate removal.

通过电沉积制备Cu / GO / Ti电极，以通过电化学还原去除硝酸盐。通过扫描电子显微镜（SEM），拉曼光谱（RS），X射线衍射（XRD），X射线光电子能谱（XPS）和电化学工作站以及Cu / GO /来表征电极的结构，形态和特性以钛为阴极，通过电化学方法去除水中的硝酸盐。表征结果表明，GO已成功沉积在Ti板上，并且被部分还原为还原的石墨烯。树突状和粒状Cu颗粒通过化学相互作用以金属Cu，Cu ₂的形式附聚在GO层的表面上O和CuO，并且树枝状Cu层增加了Cu层的比表面积。GO层的添加增加了硝酸盐的电还原活性。另外，通过与Cu / Ti电极相比，Cu / GO / Ti电极将硝酸盐去除率从78.8％提高到91.5％，能量消耗从0.82kWh / g NO ₃ ^-- N降低到0.42kWh / g NO ₃ ^-- N。目前的结果表明，带铜的GO基电极在电催化硝酸盐去除中的应用前景广阔。