Electrochemical Behaviors of Azopurine on Gold Electrodes

Authors

Ming-xue LI, Department of Chemistry,College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Hang SHI, Department of Chemistry,College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Jia LIU, Department of Chemistry,College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Meng ZHANG, Department of Chemistry,College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Jian-zhang ZHOU, Department of Chemistry,College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
De-yin WU, Department of Chemistry,College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;Follow
Zhong-qun TIAN, Department of Chemistry,College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;

Corresponding Author

De-yin WU(dywu@xmu.edu.cn)

Abstract

In this paper, we studied the electrochemical behaviors of azopurine on polished gold electrodes with cyclic voltammetry (CV). On the basis of analyzing scan rate and peak current, it was supposed that the redox process belonged to a reversible process controlled by adsorption in 0.2 mol·L^-1 PBS (pH = 4.0 ~ 10.0) solutions. The potentials of redox peaks moved more negatively with increasing pH value. This proved that the H⁺ proton has participcted in the electrochemical reaction. The further data analysis and the calculation of surface adsorption excess demonstrated that the reaction was a two-proton and two-electron process. Finally, the apparent transfer coefficient α and the apparent rate constant ks were determined by the fast-scan cyclic voltammetry method.

Graphical Abstract

Keywords

azopuine, surface adsorption excess, cyclic voltammetry, gold electrode, electrode kinetics

DOI Link

https://doi.org/10.13208/j.electrochem.180401

Publication Date

2019-12-28

Online Available Date

2018-05-09

Revised Date

2018-04-08

Received Date

2018-04-01

Recommended Citation

Ming-xue LI, Hang SHI, Jia LIU, Meng ZHANG, Jian-zhang ZHOU, De-yin WU, Zhong-qun TIAN. Electrochemical Behaviors of Azopurine on Gold Electrodes[J]. Journal of Electrochemistry, 2019 , 25(6): 651-659.
DOI: 10.13208/j.electrochem.180401
Available at: https://jelectrochem.xmu.edu.cn/journal/vol25/iss6/2