聚苯胺
检出限
纳米复合材料
化学
三元运算
电极
电化学
微分脉冲伏安法
纳米材料基催化剂
化学工程
循环伏安法
计时安培法
纳米颗粒
纳米技术
材料科学
聚合物
色谱法
物理化学
有机化学
聚合
程序设计语言
工程类
计算机科学
作者
Lingling Lin,Chenfang Miao,Shaohuang Weng,Shao‐Ming Ying,Feng Chen,Chenqing Ye,Huanglong Zhuang,You Dong-hong
标识
DOI:10.1016/j.jelechem.2020.114519
摘要
Electrochemical dopamine sensing is crucial for neurological diseases, but its practical application is challenged by sensitivity and anti-interference. Pt-decorated polymer electrode is desirable for dopamine sensing, but its unsatisfactory sensitivity, anti-poisoning capability, and stability limit its application. A new ternary Pt–Au–FeOOH-decorated polyaniline (PANI) nanocomposite (PANI/Pt–Au–FeOOH) modified electrode was successfully fabricated for dopamine (DA) detection. The electrochemical response of DA on PANI/Pt–Au–FeOOH-modified electrode obtained by differential pulse voltammetry (DPV) showed higher electrocatalytic activity than its contrastive unitary and binary Pt-decorated PANI nanocomposites. Analysis of DPV performance for PANI/Pt–Au–FeOOH-modified electrode showed a wide bilinear response of 10–200 and 0.001–10 μM, a low limit of detection (LOD) of 1 nM (0.001 μM), and outstanding anti-interference and stability. Human serum experiment revealed PANI/Pt–Au–FeOOH as a potential sensing electrode and indicated its high detection accuracy for DA. The PANI/Pt–Au–FeOOH also showed its advantage for UA detection. The remarkable advantages of its analytical performance for ternary Pt–Au–FeOOH may be ascribed to the tuning electronic structure and chemical properties of Pt by adjacent metal atoms. This work provides a new choice for the fabrication of advanced Pt-based nanocatalysts with enhanced electrochemical activity.
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