Temperature Effects on the Electron-Transfer Reactions of Fe(CN)63-/4- and Cytochrome c

Authors

Jing TANG, Key Laboratory of Analysis and Detection Technology for Food Safety, Ministry of Education, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou,350108, China;Follow
Lin DU, Key Laboratory of Analysis and Detection Technology for Food Safety, Ministry of Education, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou,350108, China;
Xiao-Jian XIAO, Key Laboratory of Analysis and Detection Technology for Food Safety, Ministry of Education, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou,350108, China;
Ning ZHANG, Key Laboratory of Analysis and Detection Technology for Food Safety, Ministry of Education, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou,350108, China;

Corresponding Author

Jing TANG(jingtang@fzu.edu.cn)

Abstract

Cyclic voltammetric and chronoamperometric techniques were employed to study the temperature effects on the electrochemical reaction of Fe(CN)63-/4- by self-made thermostatic water bath electrochemical cell. The diffusion coefficient D and the formal heterogeneous electron-transfer rate constant k0 were calculated at different temperatures from 25 °C to 75 °C. In the Fe(CN)63-/4- system, the DO values of Fe(CN)63- were directly proportional to temperature, while DR of Fe(CN)64- inversely proportional to temperature. The values of k0 decreased with the increase of temperature due possibly to the electrode passivation resulted from the decomposition of Fe(CN)63-/4- to a Prussian blue like film. Since the core of Cytochrome c is the heme iron porphyrin, the redox of Cytochrome c reflects that of the iron atoms, which is, in certain degrees, similar to the electrochemical reactions of Fe(CN)63-/4- system. Accordingly, the same techniques were used to study the temperature effects on Cytochrome c. The kinetic parameters of Cytochrome c at different temperature were also calculated and compared with those of Fe(CN)63-/4- system.

Graphical Abstract

Keywords

Temperature effect, Cytochrome c, Diffusion coefficients, formal heterogeneous electron-transfer rate constant

DOI Link

https://doi.org/10.61558/2993-074X.2878

Publication Date

2012-02-28

Online Available Date

2011-11-01

Revised Date

2011-10-17

Received Date

2011-09-21

Recommended Citation

Jing TANG, Lin DU, Xiao-Jian XIAO, Ning ZHANG. Temperature Effects on the Electron-Transfer Reactions of Fe(CN)63-/4- and Cytochrome c[J]. Journal of Electrochemistry, 2012 , 18(1): Article 7.
DOI: 10.61558/2993-074X.2878
Available at: https://jelectrochem.xmu.edu.cn/journal/vol18/iss1/7