Oscillations and period-doubling bifurcations in the electrochemical oxidation of thiourea

被引：16
|
作者：
Xu, LQ
Gao, QY [1 ]
Feng, JM
Wang, JC
机构：
[1] China Univ Min & Technol, Coll Chem Engn, Xuzhou 221008, Jiangsu Provinc, Peoples R China
[2] Univ Windsor, Dept Chem & Biochem, Windsor, ON N9P 3P4, Canada
来源：
CHEMICAL PHYSICS LETTERS | 2004年 / 397卷 / 1-3期
基金：
中国国家自然科学基金; 加拿大自然科学与工程研究理事会;
关键词：
D O I：
10.1016/j.cplett.2004.08.121
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The electrochemical oxidation of thiourea on a Pt electrode was found to exhibit both simple and period-doubled oscillations. Measurements of the potentiostatic I/O behavior and impedance spectra suggest that the studied system belongs to the hidden negative differential resistance (HNDR) oscillator. The dependence of complex oscillations on initial compositions of the reaction mixture and temperature has also been characterized, which showed that: (1) lowering the reaction temperature facilitates the occurrence of complex oscillations; (2) the frequency of oscillation increases linearly with respect to the temperature; and (3) hydrochloric acid exhibits stronger influence on the reaction behavior than nitric acid. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：265 / 270
页数：6
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