Hierarchical nanoporous platinum-copper alloy for simultaneous electrochemical determination of ascorbic acid, dopamine, and uric acid

被引：50
作者：
Zhao, Dianyun [1 ]
Fan, Dawei [1 ]
Wang, Jinping [1 ]
Xu, Caixia [1 ]
机构：
[1] Univ Jinan, Sch Chem & Chem Engn, Jinan 250022, Peoples R China
来源：
MICROCHIMICA ACTA | 2015年 / 182卷 / 7-8期
基金：
美国国家科学基金会;
关键词：
Platinum; Ascorbic acid; Dopamine; Uric acid; Bimodal nanoporous structure; Nanoporous material; Sensor; CAPILLARY-ELECTROPHORESIS; CARBON NANOTUBES; IONIC LIQUID; ELECTRODE; SENSOR; GLUCOSE; ELECTROCATALYSTS; NANOPARTICLES; PERFORMANCE;
D O I：
10.1007/s00604-015-1450-7
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A hierarchical nanoporous PtCu alloy was fabricated by two-step dealloying of a PtCuAl precursor alloy followed by annealing. The new alloy possesses interconnected hierarchical network architecture with bimodal distributions of ligaments and pores. It exhibits high electrochemical activity towards the oxidation of ascorbic acid (AA), dopamine (DA), and uric acid (UA) at working potentials of 0.32, 0.47 and 0.61 V (vs. a mercury sulfate reference electrode), respectively. The new alloy was placed on a glassy carbon electrode and then displayed a wide linear response to AA, DA, and UA in the concentration ranges from 25 to 800 mu M, 4 to 20 mu M, and 10 to 70 mu M, respectively. The lower detection limits are 17.5 mu M, 2.8 A mu M and 5.7 mu M at an S/N ratio of 3.
引用
收藏
页码：1345 / 1352
页数：8
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