Electrodeposition of CuAg alloy films from plating baths containing 3,5-diamino-1,2,4-triazole (DAT) as an inhibitor yields high surface area catalysts for the active and selective electroreduction of CO2 to multicarbon hydrocarbons and oxygenates. EXAFS shows the co-deposited alloy film to be homogeneously mixed. The alloy film containing 6% Ag exhibits the best CO2 electroreduction performance, with the Faradaic efficiency for C2H4 and C2H5OH production reaching nearly 60 and 25%, respectively, at a cathode potential of just -0.7 V vs RHE and a total current density of ∼ - 300 mA/cm2. Such high levels of selectivity at high activity and low applied potential are the highest reported to date. In situ Raman and electroanalysis studies suggest the origin of the high selectivity toward C2 products to be a combined effect of the enhanced stabilization of the Cu2O overlayer and the optimal availability of the CO intermediate due to the Ag incorporated in the alloy.

中文翻译：

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通过添加剂控制电沉积制备纳米多孔铜银合金，用于将 CO2 选择性电还原为乙烯和乙醇

从含有 3,5-二氨基-1,2,4-三唑 (DAT) 作为抑制剂的电镀浴中电沉积 CuAg 合金膜，产生高表面积催化剂，用于将 CO2 主动和选择性地电还原为多碳烃和含氧化合物。EXAFS 显示共沉积合金膜均匀混合。含有 6% Ag 的合金薄膜表现出最佳的 CO2 电还原性能，C2H4 和 C2H5OH 生产的法拉第效率分别达到近 60% 和 25%，阴极电位相对于 RHE 仅为 -0.7 V，总电流密度为 ~ - 300 毫安/平方厘米。这种在高活性和低应用电位下的高选择性是迄今为止报道的最高水平。