On the break-in and passivation phenomena in polypyrrole/sulfate films

被引：2
作者：
Hallik, Allan [1 ]
Alumaa, Ants [1 ]
Tamm, Jueri [1 ]
机构：
[1] Univ Tartu, Inst Chem, EE-51014 Tartu, Estonia
来源：
JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2010年 / 14卷 / 05期
关键词：
Polypyrrole; Sulfate; Divalent cations; Break-in; Passivation; Cycling voltammetry; AQUEOUS-SOLUTIONS; ION-TRANSPORT; ELECTROCHEMICAL PROPERTIES; MODIFIED ELECTRODES; REDOX PROCESSES; BEHAVIOR; METAL; ANIONS; ACETONITRILE; SPECTROSCOPY;
D O I：
10.1007/s10008-009-0995-y
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The influence of different divalent cations (M2+) on the electrochemical charging/discharging process of polypyrrole/sulfate (PPy/SO4) films has been investigated. In principle, two different types of M2+ were found: (a) cations that cause the break-in phenomenon in the PPy film during electrochemical cycling with a gradual increase of film electroactivity and (b) cations in whose solutions the PPy film remains mainly electroinactive. Certain correlations have been drawn between several physico-chemical properties of the investigated cations and the break-in and passivation phenomena. The break-in and passivation phenomena were found to be influenced by the size and deformability of the cation hydration shell, ion covalent index and softness, as well as by the pH value of the test solution.
引用
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页码：909 / 916
页数：8
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