Herein we report preparation of copper-silver bimetallic nanostructures with excellent electrocatalytic properties. Copper nanostructures were formed by template electrodeposition method while bimetallic nanostructures were prepared by galvanic replacement of copper with silver. Electrocatalytic activity of these nanocatalysts were demonstrated using electroanalysis of dopamine as model analyte. A maximum sensitivity of 1.56 μA/μM/cm² and a lower limit of detection of 26 nM together with good recovery in real sample analysis provided the practical feasibility of the sensor. In summary, this work demonstrates a facile route for the fabrication of cost-effective bimetallic nanoelectrocatalysts under ambient conditions within a short duration of time.

在这里，我们报告制备具有优异电催化性能的铜-银双金属纳米结构。铜纳米结构是通过模板电沉积法形成的，而双金属纳米结构是通过用银对铜进行电流置换来制备的。使用多巴胺作为模型分析物进行电分析，证明了这些纳米催化剂的电催化活性。最高的灵敏度为1.56μA/μM/ cm ²，检测下限为26 nM，在真实样品分析中具有良好的回收率，为该传感器提供了实用的可行性。总而言之，这项工作证明了在短时间内在环境条件下制造经济高效的双金属纳米电催化剂的简便途径。