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Abstract：
Hollow porous AuAg nanospheres (AuAg HPNSs) were obtained through a simple solvothermal synthesis, complemented by a dealloying strategy. The hollow interior, open pore voids, and integral interconnected skeleton shell in AuAg HPNSs are beneficial for providing sufficient electrolyte diffusion and contacts, abundant active sites, and efficient electron transport. This specific structure and the favorable alloy synergism contribute to the superior electrocatalytic activity toward dopamine (DA) and acetaminophen (AC). AuAg HPNSs show high sensitivity, good selectivity, excellent sensing durability, and outstanding repeatability for amperometric assays of AC and DA. In particular, the AuAg-based sensors achieve effective ultrasensitive simultaneous analyses of AC and DA, exhibiting the characteristics of the wide linear range and low detection limit. With their prominent electrocatalytic activity and simple preparation methods, AuAg HPNSs present broad application prospects for constructing a highly responsive electrochemical sensing system.
摘要：
通过简单的溶剂热合成获得中空多孔AuAg纳米球（AuAgHPNS），辅之以去合金战略。中空的内部，开孔空隙,AuAgHPNS中的整体互连骨架壳有利于提供足够的电解质扩散和接触，丰富的活性位点，和高效的电子传输。这种特定的结构和有利的合金协同作用有助于对多巴胺(DA)和对乙酰氨基酚(AC)具有优异的电催化活性。AuAgHPNS显示高灵敏度，良好的选择性，卓越的传感耐久性，AC和DA的安培测定具有出色的可重复性。特别是,基于AuAg的传感器实现了对AC和DA的有效超灵敏同时分析，具有线性范围宽、检测限低的特点。具有突出的电催化活性和简单的制备方法,AuAgHPNS在构建高响应电化学传感系统方面具有广阔的应用前景。
