Investigation of the Electrocatalytic Effect of Polyaniline on the Redox Reaction of 2,5-Dimercapto-1,3,4-thiadiazole by Cyclic Voltammetry

Abstract

Abstract: Electrochemical polymerized polyaniline(PAn) film electrode was used to investigate the electrocatalytic effect of PAn on the electrochemical redox reaction of 2,5-dimercapto-1,3,4-thiadiazole(DMcT). PAn film electrode was electrochemically treated or immersed in DMcTsolution before it was scanned in1.0 mol/L HCl electrolyte. The cyclic voltammograms of PAn film electrode in1.0 mol/L HCl solution changed with the above treatment, implying the electrocatalytic effect of PAn on the redox reaction of DMcT. The formation of electron-donor-acceptor adducts through the interaction between thiol or disulfide groups of DMcTand amine or imine groups of PAn during the treatment was probably the reason of the catalysis. The electrochemical properties of the adduct were different from those of PAn and DMcT. The adduct possessed a higher electrochemical activity and a better electrochemical reversibility than DMcTor PAn used alone.

Key words: Polyaniline, 2,5-Dimercapto-1,3,4-thiadiazole, Electrochemical catalysis

CLC Number:

O657

TrendMD:

YU Lei, WANG Xian-Hong, LI Ji, JING Xia-Bin, WANG Fo-Song . Investigation of the Electrocatalytic Effect of Polyaniline on the Redox Reaction of 2,5-Dimercapto-1,3,4-thiadiazole by Cyclic Voltammetry[J]. Chem. J. Chinese Universities, 2000, 21(2): 311.

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Investigation of the Electrocatalytic Effect of Polyaniline on the Redox Reaction of 2,5-Dimercapto-1,3,4-thiadiazole by Cyclic Voltammetry

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