Electrochemical fabrication of a cauliflower-like nanostructured Pd film from pure Pd and its applications in electrocatalysis and electroanalysis
Electrochemical fabrication of a cauliflower-like nanostructured Pd film from pure Pd and its applications in electrocatalysis and electroanalysis
复制标题
纯钯电化学制备菜花状纳米结构钯薄膜及其在电催化和电分析中的应用
DOI：
10.1016/j.electacta.2013.06.054
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发表时间：
2013-09-30
影响因子：
6.6
通讯作者：
Huang, Wei
中科院分区：
文献类型：
--
作者：
Xu, Shili;Zhang, Hefang;Huang, Wei
在KCl溶液中，通过在纯Pd基底上施加一个双电位阶跃，制备了菜花状纳米结构Pd膜（CNPF）。CNPF的形成主要涉及由纯Pd形成K_2PdCl_4盐及其电还原为Pd原子。所制备的CNPF电极对乙醇和抗坏血酸（AA）的氧化表现出较高的电催化活性。将该电极用于AA的恒电位安培法（CPA）和循环伏安法（CV）检测，在较高浓度区域获得了良好的分析性能。在-0.4 V下进行的CPA研究中，氧化电流在0.1-7.5 mM范围内与AA浓度呈线性相关，检测限为80 μ M（基于S/N = 3），响应时间约为3 s，灵敏度为589.80 μ A mM（-1）cm（-2）。同时，CV中的峰电流响应在0.1-35 mM的宽范围内呈线性，灵敏度为178.56 μ A mM（-1）cm（-2）。此外，该电极还可用于维生素C片中AA的测定，结果满意。(C)2013爱思唯尔有限公司保留所有权利。
A cauliflower-like nanostructured Pd film (CNPF) has been fabricated by just applying one double-potential step on a pure Pd substrate in a KCl solution. The CNPF formation mainly involves the formation of K2PdCl4 salt from pure Pd and its electroreduction to Pd atoms. The as-prepared CNPF electrode exhibits high electrocatalytic activities toward the oxidation of ethanol and ascorbic acid (AA). The CNPF electrode is also employed to detect AA by means of constant potential amperometry (CPA) and cyclic voltammetry (CV), and good analytical performances in the higher-concentration regions are obtained. In CPA studies performed at -0.4 V, the oxidation current is linearly dependent on AA concentration in the range of 0.1-7.5 mM with a detection limit of 80 mu M (based on S/N = 3), a short response time of about 3 s and a high sensitivity of 589.80 mu A mM(-1) cm(-2). Meanwhile, the peak current responses in CVs are linear over the broad range of 0.1-35 mM with a sensitivity of 178.56 mu A mM(-1) cm(-2). Besides, the CNPF electrode can also be used to detect AA in medicine vitamin C tablet with satisfactory results. (C) 2013 Elsevier Ltd. All rights reserved.