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Citation: LIU Wenhan, YUAN Ronghui, TENG Yuanjie, MA Chun'an. Electrochemical Oxidation Mechanism of Thiosalicylic Acid on Activated Glassy Carbon Electrode[J]. Chinese Journal of Applied Chemistry, ;2014, 31(3): 342-347. doi: 10.3724/SP.J.1095.2014.30210 shu

Electrochemical Oxidation Mechanism of Thiosalicylic Acid on Activated Glassy Carbon Electrode

1.
College of Chemical Engineering and Material Science, Zhejiang University of Technology, Hangzhou 310014, China

Corresponding author: LIU Wenhan,
Received Date: 27 April 2013
Available Online: 25 June 2013
Fund Project: 浙江省科技厅公益性技术应用研究(分析测试)计划项目(2012C37014) (分析测试)计划项目(2012C37014)浙江省重点科技创新团队(2011R09002-12) (2011R09002-12)

Electrochemical behavior of thiosalicylic acid(TSA) on activated glassy carbon electrode(GCE) was studied.TSA exhibited irreversible electrochemical oxidation process in KCl solution by cyclic voltammetry(CV).Neutral/anionic TSA distribution and anodic potential shifts at different pH were also discussed.With increase of pH,the anodic potential gradually decreases while the concentration of C₆H₄(COO^-) SH increases.This indicates that C₆H₄(COO^-) SH is more readily to be oxidized than C₆H₄(COOH) SH.The decreasing tendency of potential slows down when the pH is above 6.When the pH is elevated to 11,the disappearance of anodic peak indicates that the electrode reaction ss prohibited in the absences of H+.During the electrochemical oxidation of TSA,one H+ participates in the reaction with average every three electrons transferring.Therefore,the final product is inferred as 2-sulfobenzoic acid.
- thiosalicylic acid,
- cyclic voltammetry,
- activated glassy carbon electrode,
- electrochemical oxidation mechanism
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