Traditional electrodeposition of carbon films requires organic solvents or organic acids to serve as the carbon source. In this study, we demonstrated electrodeposition of carbon films from carbon dioxide (CO₂) around room temperature. CO₂ was dissolved in methanol with the help of elevated pressures, and tetrabutylammonium hexafluorophosphate was used as the conducting salt. Carbon films could be obtained at cell voltages above 3 V. High deposition rates up to 979 nm h^-1 were achieved. The effects of cell voltage and cell pressure on the film morphology, deposition rate and current efficiency were investigated. The mechanism of reduction of CO₂ to carbon films was also proposed in this study. The electrodeposited carbon films exhibited good hydrophobicity.

碳膜的传统电沉积需要有机溶剂或有机酸作为碳源。在这项研究中，我们证明了室温下由二氧化碳（CO ₂）沉积碳膜的电沉积。借助于高压将CO ₂溶解在甲醇中，并将六氟磷酸四丁铵用作导电盐。可以在高于3 V的电池电压下获得碳膜。获得了高达979 nm h ^-1的高沉积速率。研究了电池电压和电池压力对薄膜形貌，沉积速率和电流效率的影响。减少CO ₂的机理在这项研究中还提出了碳膜的制备方法。电沉积的碳膜表现出良好的疏水性。