引用本文:
田颖, 李浙齐, 徐洪峰, 吴艳波, 杨凤林. 不同电解质溶液对聚吡咯修饰膜性质的影响[J]. 物理化学学报,
2008, 24(04): 612-618.
doi:
10.3866/PKU.WHXB20080412
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
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
不同电解质溶液对聚吡咯修饰膜性质的影响
摘要:
以对甲基苯磺酸钠(p-TSNa)为掺杂剂在不锈钢电极表面恒电位合成聚吡咯(PPy)修饰膜, 采用循环伏安法在-1.6 - 0.8 V大范围扫描研究了修饰膜在H2SO4、Na2SO4、NaOH电解质溶液中的氧化还原行为. 结果表明, 在H2SO4溶液中, 以H+的脱出(氧化)/嵌入(还原)为特征, 并发现聚吡咯在酸性溶液中所特有的质子还原峰. 在Na2SO4和NaOH溶液中, 以Na+的脱出(氧化)/嵌入(还原)峰为特征. FT-IR吸收光谱显示, 经NaOH处理后, 聚吡咯膜的长共轭结构被完全破坏, 而经H2SO4和Na2SO4处后, 膜的共轭结构未发生变化.
English
Effects of Different Electrolyte Solutions on Characteristics of Polypyrrole-Modified Films
Abstract:
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.
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