Cu₂O films were prepared using an improved solution immersion method, whereas ZnO/Cu₂O films were prepared using an electrodeposition method. Then, the pure Cu₂O film electrodes and ZnO/Cu₂O film electrodes were used to reduce CO₂ to CH₃OH. The crystal structure, morphology, particle size, and specific surface area of pure Cu₂O films prepared under different immersion times and ZnO/Cu₂O films prepared under different deposition times and Zn²⁺ concentrations were analyzed using X-ray diffraction, scanning electron microscopy, and Brunauer–Emmett–Teller analysis. The electrolytic activity of the pure Cu₂O film electrodes and ZnO/Cu₂O film electrodes were studied. Under the same reaction conditions, the ZnO/Cu₂O film electrode with the Zn²⁺ concentration of 0.05 M and the deposition time of 30 min had the highest total CH₃OH yield of 315.656 μmol/cm² and the fastest formation rate of 52.609 μmol/(cm² h), and its faradaic efficiency was 45%, which was remarkably higher than that of pure Cu₂O film electrodes under the same reaction conditions. This study highlighted that ZnO nanoparticles had a very good promotion of electrolytic CO₂ reduction on Cu₂O film.

Cu ₂ O 膜使用改进的溶液浸渍法制备，而ZnO/Cu ₂ O 膜使用电沉积法制备。然后，使用纯Cu ₂ O 膜电极和ZnO/Cu ₂ O 膜电极将CO ₂还原为CH ₃ OH。采用X射线衍射、扫描仪分析了不同浸泡时间制备的纯Cu ₂ O薄膜和不同沉积时间和Zn ²⁺浓度制备的ZnO/Cu ₂ O薄膜的晶体结构、形貌、粒径和比表面积。电子显微镜和 Brunauer-Emmett-Teller 分析。纯铜的电解活性_{研究了 2} O 膜电极和 ZnO/Cu ₂ O 膜电极。在相同反应条件下，Zn ²⁺浓度为0.05 M、沉积时间为30 min的ZnO/Cu ₂ O薄膜电极的CH ₃ OH总产率最高，为315.656 μmol/cm ²，生成速率最快。 52.609 μmol/(cm ²  h)，法拉第效率为45%，明显高于相同反应条件下纯Cu ₂ O薄膜电极。该研究强调了ZnO纳米颗粒对Cu ₂ O薄膜上的电解CO ₂还原有很好的促进作用。