The crucial technology of combining the excess capacity from power plants and the electrocatalytic reduction method to realize the direct conversion of products from ammonia-based CO₂ capture to syngas of CO and H₂ is to research and develop catalysts for direct electrochemical NH₄HCO₃ reduction. The electrochemical performance of halogen (Cl, Br, and I)-modified Ag electrodes by cyclic voltammetry (CV) oxidation and reduction treatment carried out in supersaturated NH₄HCO₃ electrolyte without CO₂ bubbling. All of the halogen-modified catalysts realized the direct reduction of NH₄HCO₃ to syngas of CO and H₂. Among them, the Br-modified Ag catalysts have CO Faradaic efficiency of 74.0% at − 0.5 V versus reversible hydrogen electrode much higher than that of Cl- (38%) and I- (39.8%) modified Ag catalysts. The H₂/CO ratio on the Br-modified Ag catalyst is approximately 0–3, which is conducive to the reserve of multi-carbon raw materials and the process of Fischer Tropsch synthesis. Furthermore, the Cl-modified Ag catalyst could control the H₂/CO ratio of syngas in a wide range of 0.6–6.0 under low potential (from −0.3 to −0.7 V), which is beneficial to apply to different industrial production.

将电厂过剩产能与电催化还原法相结合，实现氨基CO ₂捕集产物直接转化为CO和H ₂合成气的关键技术是研发直接电化学NH ₄ HCO ₃催化剂。减少。通过循环伏安法 (CV) 氧化和还原处理在没有 CO ₂鼓泡的过饱和 NH ₄ HCO ₃电解质中进行的卤素（Cl、Br 和 I）修饰的 Ag 电极的电化学性能。所有卤素改性催化剂均实现了NH ₄ HCO ₃直接还原为CO和H的合成气₂ . 其中，Br 修饰的 Ag 催化剂在 - 0.5 V 时对可逆氢电极的 CO 法拉第效率为 74.0%，远高于 Cl- (38%) 和 I- (39.8%) 修饰的 Ag 催化剂。Br改性Ag催化剂上的H ₂ /CO比约为0-3，有利于多碳原料的储备和费托合成过程。此外，Cl修饰的Ag催化剂可以在低电位（-0.3至-0.7 V）下将合成气的H ₂ /CO比控制在0.6-6.0的范围内，有利于应用于不同的工业生产。