CO2 在水系电解液中的还原过程为CO2 首先 溶解在水溶液中形成水合态 CO2 然后吸附在催化 剂表面进行还原。 然而由于 CO2 在水溶液中的溶 解度极低且单纯的水溶液电阻过高严重影响催化 剂的选择性所以不能直接作为 CO2ER 电解液使 用通过在水溶液中加入无机盐离子可显著提高溶 液的导电性。 目前CO2ER 电解液一般使用 KHCO3 或 NaHCO3 溶液此时体系 pH 值接近中性一方面

The reduction process of CO2 in aqueous electrolytes involves the dissolution of CO2 in the aqueous solution to form hydrated CO2, which is then adsorbed on the catalyst surface for reduction. However, due to the extremely low solubility of CO2 in water and the high electrical resistance of pure water, the selectivity of the catalyst is severely affected, and thus CO2 cannot be directly used as an electrolyte for CO2ER. The addition of inorganic salt ions to the aqueous solution can significantly improve the conductivity of the solution. Currently, KHCO3 or NaHCO3 solutions are commonly used as CO2ER electrolytes, with a pH value close to neutral. This approach can avoid direct reaction between the electrolyte and CO2, and also prevent corrosion of the catalyst material