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Citation: TIAN Ying, LI Zhe-Qi, XU Hong-Feng, WU Yan-Bo, YANG Feng-Lin. Effects of Different Electrolyte Solutions on Characteristics of Polypyrrole-Modified Films[J]. Acta Physico-Chimica Sinica, ;2008, 24(04): 612-618. doi: 10.3866/PKU.WHXB20080412 shu

Effects of Different Electrolyte Solutions on Characteristics of Polypyrrole-Modified Films

1.
College of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning Province, P. R. China; Department of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning Province, P. R. China

Received Date: 28 November 2007
Available Online: 13 March 2008

Polypyrrole (PPy) films were synthesized by potentiolstatic method froma para-toluenesulfonic sodium (p-TSNa) solution on stainless steel. Cyclic voltammetry of PPy-modified electrodes in the wide potential range from -1.6 to 0.8 V was conducted in H2SO4, Na2SO4, and NaOH solutions, respectively. The results showed that cyclic voltammogramin H2SO4 solution was featured by H+ insertion during reduction process and H+ expulsion during oxidation process. A unique peak associated to H+ reduction was first discovered. In Na2SO4 and NaOH solutions, cyclic voltammograms are featured by Na+ insertion during reduction process and Na+ expulsion during oxidation process. The data of FT-IR absorption spectra demonstrated that NaOH treatment had made extensive structure degradation, but Na2SO4 and H2SO4 treatments had not made conjugated structure changes on PPy films.
- Polypyrrole; Redox behavior; Electrolyte solutions; FT-IR
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