Electrical anodization of Cu foil produces one-dimensional Cu nanowires of high surface areas, which turns to CuIn alloy nanowires by indium electrodeposition replacing edge site Cu atoms. An electrochemical pre-activation forms a highly conformal amorphous In(OH)₃ overlayer with oxygen vacancy on the CuIn alloy that facilitates CO₂ adsorption to promote selective CO formation suppressing competing H₂ adsorption. Thus the activated CuIn alloy nanowires catalyse electrochemical CO₂ conversion to CO with high CO selectivity (>68.2%) and high current density (ca. −3.9 mAcm⁻²) at −0.6 V_RHE, which represents the higher partial CO current density (ca. −2.66 mAcm⁻²) than that of previously reported CuIn alloy powders without nanostructuring. The performance remains stable for more than 15 h without significant degradation.

Cu箔的电阳极氧化产生高表面积的一维Cu纳米线，通过铟电沉积替代边缘位点Cu原子，从而转变为CuIn合金纳米线。电化学预活化在CuIn合金上形成具有氧空位的高度共形的非晶In（OH）₃覆盖层，该层有助于CO ₂吸附，促进选择性CO的形成，抑制竞争性H ₂吸附。因此，活化的CuIn合金纳米线在-0.6 V _RHE时以高CO选择性（> 68.2％）和高电流密度（约-3.9 mAcm ^-2）催化电化学CO ₂转化为CO ，这表示较高的部分CO电流密度（约。-2.66 mAcm ^-2），而不是以前报道的没有纳米结构的CuIn合金粉末。性能可保持稳定超过15小时，而不会出现明显的退化。