频谱分析法研究超声对电化学反应中传质过程的影响  

Spectrum Analysis of the Effect of Ultrasound to Mass Transfer Process in Electrochemical Reaction

作　　者：鄂利海[1] 周定[2] 孙伟[1] 栾耕时[1] 陈家福[1] 

机构地区：[1]抚顺石油学院环境工程系,抚顺113001 [2]哈尔滨工业大学环境科学与工程系,哈尔滨150006

出　　处：《高等学校化学学报》2001年第10期1649-1653,共5页Chemical Journal of Chinese Universities

摘　　要：采用频谱分析法对超声作用下 Fe( CN) 3- 6 /Fe( CN) 4- 6 氧化还原体系在 Pt微电极上的计时电流实验数据进行分析 .通过离散傅里叶变换 ( DFT)将复杂的时域谱转化为频域谱 ,较清楚地将超声对电极反应的影响区分为不同频率下的幅值信号 .对不同超声条件下的分析结果表明 ,该方法可定量地分析不同超声条件下超声对传质过程的影响 ,并分析了超声强度随作用距离增大而衰减的规律 .在相同超声条件下的实验结果表明 ,经Spectrum analysis method was used to study the currents of chronoamperometry of \{Fe(CN)\+\{3-\}\-6/Fe(CN)\+\{4-\}\-6\} at Pt microdisk electrode under ultrasound. Through the DFT can transform the complicate Time spectrum to simple frequency spectrum in some special frequencies, which have specific amplitudes relatived to different mass transfer process of ultrasound. This method can be used to analyse the effect of ultrasound under different conditions, and gives a quantification result. The decay rule of effect of ultrasound with the distance between sono\|horn and surface of electrode was also studied.

关 键 词：功率超声 频谱分析 传质过程 电化学反应 反应历程 电极反应 

分 类 号：O646.5[理学—物理化学] O657.14[理学—化学]