Electrochemical Nucleation of Invar Alloy on Glassy Carbon Electrode

Authors

Xian-jie HUANG, Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;
Hui YAN, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry,College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Shuai-shuai HUANG, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry,College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Fang-zu YANG, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry,College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;Follow
Zhong-qun TIAN, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry,College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Shao-min ZHOU, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry,College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;

Corresponding Author

Fang-zu YANG(fzyang@xmu.edu.cn)

Abstract

Abstract: The linear sweep voltammetry, cyclic voltammetry and potential step methods were used to study the electrodeposition mechanism of Invar nickel-iron alloy (the mass fraction of nickel was 32~36%) on glassy carbon electrode surface in the weak acidic bath. The results demonstrate that the electrodeposition is was a diffusion controlled irreversible electrode process in this system. The Scharifker-Hill (SH) theory theoritic model (SH) were was used employed to fitting the experimental data and the result shows that the codeposition of Invar alloy on glassy carbon electrode surface conformed to the diffusion controlled three-dimensional instantaneous nucleation mechanism. The kinetic parameters were obtained by the Heerman-Tarallo (HT) theory theoretic model (HT). When the step potential shifted from -1.11 V to -1.17 V, the active nucleation sites density (N0) increased from 0.72×10⁵ cm^-2 to 1.91 ×10⁵ cm^-2. The nucleation rate constant (A) raised from 40.35 s^-1 to 194.38 s^-1 and the diffusion coefficient (D) was(7.67±0.15)×10^-5 cm²•s^-1, remaining basically constant.

Graphical Abstract

Keywords

invar alloy, electrocrystallization, nucleation mechanism, cyclic voltammetry, potential step

DOI Link

https://doi.org/10.13208/j.electrochem.160318

Publication Date

2017-02-28

Online Available Date

2016-04-05

Revised Date

2016-03-29

Received Date

2016-03-18

Recommended Citation

Xian-jie HUANG, Hui YAN, Shuai-shuai HUANG, Fang-zu YANG, Zhong-qun TIAN, Shao-min ZHOU. Electrochemical Nucleation of Invar Alloy on Glassy Carbon Electrode[J]. Journal of Electrochemistry, 2017 , 23(1): 7-12.
DOI: 10.13208/j.electrochem.160318
Available at: https://jelectrochem.xmu.edu.cn/journal/vol23/iss1/2