Effects of the Surfactant and pH on Linear Potential Scan of Aqueous Na₂S Solution

Authors

Qing-feng YI, Chem . Eng. Dept. of Xiangtan Polytechnic University, Xiangtan 411201
Qi-yuan CHEN, Chem. Dept. of Central South Univ. of Technology, Changsha 410083
Ping-min ZHANG, Chem. Dept. of Central South Univ. of Technology, Changsha 410083

Corresponding Author

Qing-feng YI

Abstract

In presence of a cationic surfactant HTAB,linear potential scans for Na₂S at graphite anode in both saturated sodium tetra-borate solution and 1 mol·L^-1 NaOH solution, have been investigated. Results show that anodic current density increases and peak potentials shift to more negative with the increase of HTAB concentrations. The anodic current densities increased by addition of HTAB are larger in 1 mol·L^-1 NaOH than those in saturated sodium tetra-borate solution, resulting from different acting forces of HTAB with various charged electro-active species. Both oxidation and reduction peaks in cyclic voltammograms for Na₂S containing solution become sharper if HTAB is present in the anolyte. The appearance of several reduction peaks indicates that intermediate polysulfides are produced in negative-going scan.

Keywords

Sodium sulfide, Cyclic voltammetry, Surfactant, Electrolysis

DOI Link

https://doi.org/10.61558/2993-074X.3194

Publication Date

1999-08-28

Online Available Date

1999-08-28

Revised Date

1998-12-02

Received Date

1998-09-22

Recommended Citation

Qing-feng YI, Qi-yuan CHEN, Ping-min ZHANG. Effects of the Surfactant and pH on Linear Potential Scan of Aqueous Na₂S Solution[J]. Journal of Electrochemistry, 1999 , 5(3): 337-341.
DOI: 10.61558/2993-074X.3194
Available at: https://jelectrochem.xmu.edu.cn/journal/vol5/iss3/18