An important strategy for reducing the impact of global CO₂ emissions involves conversion technologies that transform CO₂ into value-added materials. Bimetallic electrocatalysts of Zn and Ag were constructed on polypyrrole-decorated carbon paper (CP/PPy) electrodes for the improved electrochemical reduction of CO₂ to CO. Bimetallic catalysts with different Zn and Ag atomic ratios were produced by the partial galvanic replacement of Zn with Ag on a CP/PPy/Zn electrode. Selectivity for the electrochemical reduction of CO₂ to CO at the CP/PPy/Zn/Ag was clearly improved compared to those of the single-metal catalysts (CP/PPy(Ag or Zn)), while the hydrogen evolution reaction (HER) was suppressed. The PPy interlayer between the catalyst and CP support reduced the hydrophobicity of the carbon paper electrode, which facilitated the effective electrodeposition of Ag and Zn on the CP and suppressed the HER at the electrode. Herein, we propose Zn:Ag bimetallic composites deposited on PPy surfaces as CO-selective electrocatalysts with the optimal Zn:Ag catalyst composition suggested by electrochemical and physicochemical analyses. We experimentally confirmed that the atomically mixed Ag-Zn in the bimetallic catalysts enhanced the CO selectivity and production rate over each single metal catalyst. The developed electrocatalyst resulted in a maximum Faradaic efficiency of approximately 70% and a maximum current density of 8.6 mA/cm² for the CO₂ reduction reaction to CO in a 1 M KHCO₃ aqueous solution.

减少全球CO ₂排放影响的一项重要策略涉及将CO ₂转化为增值材料的转化技术。在聚吡咯修饰的碳纸（CP / PPy）电极上构建Zn和Ag的双金属电催化剂，以改善CO ₂转化为CO的电化学还原。通过用锌部分电置换Zn制备具有不同Zn和Ag原子比的双金属催化剂。 Ag在CP / PPy / Zn电极上。电化学还原CO _2的选择性与单金属催化剂（CP / PPy（Ag或Zn））相比，CP / PPy / Zn / Ag处的CO明显改善，而析氢反应（HER）得到抑制。催化剂和CP载体之间的PPy中间层降低了碳纸电极的疏水性，从而促进了CP上Ag和Zn的有效电沉积，并抑制了电极上的HER。在本文中，我们提出了在PPy表面沉积的Zn：Ag双金属复合物作为CO选择性电催化剂，通过电化学和物理化学分析提出了最佳的Zn：Ag催化剂组成。我们通过实验证实，双金属催化剂中原子混合的Ag-Zn相对于每种单金属催化剂提高了CO的选择性和生产率。²用于CO ₂中的1M KHCO还原反应，CO ₃水溶液。