Abstract
In presence of a cationic surfactant HTAB,linear potential scans for Na 2S 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 Na 2S 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
Publication Date
1999-08-28
Online Available Date
1999-08-28
Revised Date
1999-08-28
Received Date
1999-08-28
Recommended Citation
Qingfeng Yi.
Effects of the Surfactant and pH on Linear Potential Scan of Aqueous Na 2S Solution[J]. Journal of Electrochemistry,
1999
,
5(3): Article 18.
DOI: 10.61558/2993-074X.3194
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol5/iss3/18
References
1 Mao Z, Anani A , White R Eet al . A m odified electroche mical process for the deco m position of hydrogen sulfide inan aqueous solution . J. Electroche m . Soc .,1991 ,138( 5) :1 299 2 Anani A A, Mao Z, White R et al . Electrochem ical production of hydrogen and sulfur by lo w_te m perature deco mposition of hydrogen sulfide in an aqueous alkaline solution . J. Electroche m . Soc .,1990 ,137(9) :2 703 3 Fletcher E A. Hydrogen and sulfur fro m H2 S:a m bient te m perature electrolysis using oxidation of H2 S by air asthe prim e energy source . Energy ,19 83 ,8(11) :835 4 易 清风,陈 启元,张平 民.硫化 钠溶液电 化学分 解制备硫 磺和氢 气的研究 .环境科 学学报,1998 ,18 (5) :539 5 Kalina D W , Maas E T. Indirect H2 Sconversion_1 ,a basic electroche mical process . Int . J. Hydrogen Energy ,19 85 ,10(3) :163 6 Kalina D W , Maas E T, Indirect H2 S conversion_2 ,a basic electroche mical process . Int . J. Hydrogen Energy ,1985 ,10(3) :157 7 Olson D C. U. S. Pat . ,1984 ,4 436713 8 Bol m er P W . U. S.pat .,196 8 ,3409520 9 Shiang S Y , Long L J. Continuous solvent extraction of sulfur fron the electroche mical oxidation of a basic sulfidesolution in the C S T E Rsyste m . Ind . Eng . Che m . Process Des . Dev .,1986 ,25(3) :834 10 Castaneda F, Pezeron E, Plichon V . Electrochem ical oxidation of sulfide in presence of surfactants . Bull . Dela Soc . Chim .de France ,1987 ,1 :3 4 11 刘 常青.硫 化氢水溶 液间接 电解研究[ 硕士论 文] ,长沙 :中南工 业大学:1997 12 Yi Q F, Chen Q Y, Zhan g P M . Electroche mical study of Na2 Ssolution in the presence of surfactants . J. Environ m ental Sic .,1998 ,10( 3) :37 13 Briceno A, Chander S. Oxidation of hydrosulfide ions on gold part 1 :a cycle volta m m etry study . J. Appl . Electroche m .,1990 ,20 :56 14 Yi Q F, Chen Q Y, Zhan g P M . Ther m odyna mic analysis for S_ H2 O syste m at 25 ℃ . Trans . Nonferrous Met . Soc . China ,1997 ,7(1) :27
