Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University , Guiyang, Guizhou Province 550025, P. R. China.
Department of Chemistry, Tsinghua University , Beijing 100084, P. R. China.
Langmuir. 2017 Aug 15;33(32):8070-8075. doi: 10.1021/acs.langmuir.7b01274. Epub 2017 Aug 4.
Preparing Pt-based one-dimensional (1D) ultrafine nanowires with abundant structural defects/grain boundaries and exploring their novel applications have attracted great interest in real-world applications. Here we introduce an environmentally friendly, facile aqueous solution approach to directly prepare a series of sub-3.0 nm PtRu ultrafine wavy nanowires. Characterizations show that the PtRu nanowires are alloy polycrystalline structures with abundant structural defects/grain boundaries. We first introduce the as-synthesized PtRu nanowires into electrochemical biosensors for the detection of DA and find that the PtRu nanowires exhibit excellent electrocatalytic activity to DA with fast response, ultralow limit of detection, and excellent selectivity at a potential of 0.3 V in 0.1 M phosphate buffered solution (pH 7.2). This study shows an effective approach to the development of ultrafine PtRu nanowires as electrocatalysts for electrochemical nonenzymatic dopamine biosensors.
制备具有丰富结构缺陷/晶界的 Pt 基一维（1D）超细纳米线，并探索其在实际应用中的新应用，引起了人们的极大兴趣。在这里，我们介绍了一种环保、简便的水溶液方法，可直接制备一系列亚 3.0nm 的 PtRu 超细波纹纳米线。表征表明，PtRu 纳米线是具有丰富结构缺陷/晶界的多晶合金结构。我们首先将合成的 PtRu 纳米线引入电化学生物传感器中用于检测 DA，并发现 PtRu 纳米线在 0.1 M 磷酸盐缓冲溶液（pH 7.2）中，在 0.3 V 的电势下，对 DA 具有优异的电催化活性，具有快速响应、超低检测限和出色的选择性。本研究为开发作为电化学非酶多巴胺生物传感器的电催化剂的超细 PtRu 纳米线提供了一种有效方法。
