Dendritic Ag (a CO₂-to-CO reduction catalyst) has been synthesized on carbon paper (CP) using pulse electrodeposition to fabricate a gas diffusion electrode. A combination of sonication and pulse deposition facilitated mass transfer of Ag ions to the CP, enlarging the catalyst active surface area without significantly changing the Ag crystalline structure. The current density of CO₂ reduction was proportional to the surface area of dendritic Ag. Further improvements in performance were achieved by adding polyethylene glycol to the CO₂ reduction cell catholyte that removed the CO gas bubbles produced at the electrode surface. The fabrication methods presented herein suggest an effective gas diffusion electrode for application in the membrane-electrode-assembly-type single cell for electrochemical CO₂ reduction.

已经使用脉冲电沉积在碳纸（CP）上合成了树枝状Ag（CO ₂ -to-CO还原催化剂）以制造气体扩散电极。超声处理和脉冲沉积的结合促进了Ag离子向CP的质量转移，在不显着改变Ag晶体结构的情况下扩大了催化剂的活性表面积。CO ₂还原的电流密度与树枝状Ag的表面积成正比。通过将聚乙二醇添加到CO _2中，可以进一步提高性能。还原池阴极电解液，可去除在电极表面产生的CO气泡。本文提出的制造方法提出了一种有效的气体扩散电极，该气体扩散电极可用于膜电极组件型单电池以减少电化学CO ₂。