摘要
运用循环伏安法和恒电位法研究铬酸钾及其浓度对铜磷酸溶液的电化学振荡行为的影响。结果发现铬酸钾的加入改变了振荡的振幅、周期和频率 ,且随着浓度的升高 ,振荡逐渐减弱 ,甚至完全抑制振荡。加入铬酸钾后 ,原有多周期振荡体系转变为单周期和周期 -2振荡体系 ,电流振荡总体趋势随恒定电势的加大从不规则趋向规则。
The influence of potassium chromate on the electrochemical oscillation behavior of copper anode in H_3PO_4 solutions was investigated by using cyclic voltammetry and potentiodynamic scanning. The results show that the amplitude,period and frequency of oscillation changed with the addition of potassium chromate. With the increase of the concentration of potassium chromate,oscillations decreased gradually and even were fully controlled at the higher concentration of it. There were oxidizing films in that process. The results also show that different states of the current oscillation behavior appeared with the addition of potassium chromate,and that multiple periodic oscillations had been changed into the oscillation of single period or that of period-2. The mechanism is theoretically analyzed in this paper.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
2004年第12期1524-1527,共4页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目 ( 2 99760 0 9)
安徽省自然科学基金资助项目 ( 0 10 44 3 0 2 )
关键词
电流振荡
铬酸钾
铜
阳极溶解
current oscillation
potassium chromate
copper
anodic dissolution
