ac-Electrogravimetry study of ionic and solvent motion in polypyrrole films doped with an heteropolyanion, SiMo12O404-

被引：13

作者：

Debiemme-Chouvy, C. ^{[1
]}

Rubin, A. ^{[1
]}

Perrot, H. ^{[1
]}

Deslouis, C. ^{[1
]}

Cachet, H. ^{[1
]}

机构：

[1] UPMC, CNRS, UPR 15, Lab Interfaces & Syst Electrochim, F-75252 Paris, France

来源：

ELECTROCHIMICA ACTA | 2008年 / 53卷 / 11期

关键词：

polypyrrole; heteropolyanion; EQCM; ac-electrogravimetry; solvent motion;

D O I：

10.1016/j.electacta.2007.09.041

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

One way to immobilize heteropolyanions on an electrode is to entrap them into a film of conducting polymer. In the present work, a polypyrrole film doped with a Keggin-type heteropolyanion, SiMo12O404-, obtained by electrochemical way was studied. We focus on the charge compensation process, which occurs when the heteropolyanions entrapped into the polymer are reduced or re-oxidized. First, electrochemical quartz crystal microbalance analyses were performed, then, to determine if solvent motion takes place, ac-electrogravimetry measurements were carried out. In fact, in concentrated acidic solution, only protons are involved in the charge compensation. In low acidic solution (pH 3) having a high potassium concentration (0.5 M) both proton and potassium ions are involved whereas at pH 5.2 only potassium motion takes place. These findings are in good agreement with the acido-basic properties Of SiMo12O406-. In all cases, no solvent motion was pointed out. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：3836 / 3843

页数：8

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