We report free-standing bimetallic nanoporous CuAg (NPCuAg) structures prepared via a facile one-step electrochemical dealloying proccess. The Ag/Cu ratio and the thickness of the NPCuAg structures could be tuned by the composition of the corresponding metallic glass (MG) precursors and dealloying time. All dealloyed samples exhibited a uniform three-dimensional bi-continuous nanoporous structure and homogeneous chemical composition. The effects of the Ag/Cu ratio and dealloying time on the electrocatalytic performance toward glucose oxidation were systematically investigated. It was found that the NPCu_4.5Ag-1 H electrode showed the highest enhanced electrocatalytic activity due to the high surface area of the nanoporous structure and the optimal synergistic effect. Furthermore, this electrode exhibited an outstanding sensitivity of 5.91 mA cm⁻² mM⁻¹, a wide linear range up to 6 mM, a low detection limit of 0.5 μM, fast response time within 1.3 s, excellent selectivity and good stability. Considering these advantages, the designed electrode can be a promising electrochemical sensing platform for highly efficient glucose detection.

我们报告了通过简单的一步电化学脱合金过程制备的独立双金属纳米多孔 CuAg (NPCuAg) 结构。NPCuAg 结构的 Ag/Cu 比和厚度可以通过相应的金属玻璃 (MG) 前体的组成和脱合金时间来调整。所有脱合金样品都表现出均匀的三维双连续纳米孔结构和均匀的化学成分。系统研究了Ag/Cu比和脱合金时间对葡萄糖氧化电催化性能的影响。发现NPCu _4.5由于纳米多孔结构的高表面积和最佳的协同效应，Ag-1 H电极显示出最高的增强电催化活性。此外，该电极具有5.91 mA cm ^-2 mM ^-1的出色灵敏度、高达6 mM的宽线性范围、0.5 μM的低检测限、1.3 s内的快速响应时间、优异的选择性和良好的稳定性。考虑到这些优势，所设计的电极可以成为用于高效葡萄糖检测的有前途的电化学传感平台。