Investigation of Polypyrrole Degradation Using Electrochemical Impedance Spectroscopy

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dc.contributor.author Marchesi, L. F. Q. P.
dc.contributor.author Simões, Fabio Ruiz [UNIFESP]
dc.contributor.author Pocrifka, L. A.
dc.contributor.author Pereira, E. C.
dc.date.accessioned 2016-01-24T14:17:05Z
dc.date.available 2016-01-24T14:17:05Z
dc.date.issued 2011-08-11
dc.identifier http://dx.doi.org/10.1021/jp2041263
dc.identifier.citation Journal of Physical Chemistry B. Washington: Amer Chemical Soc, v. 115, n. 31, p. 9570-9575, 2011.
dc.identifier.issn 1520-6106
dc.identifier.uri http://repositorio.unifesp.br/handle/11600/33951
dc.description.abstract In this paper, the electrochemical degradation of polypyrrole film was studied by means of overpotential application. the overpotential was 0.58 V versus SCE, and after every S mm of application of 0.58 V, a cyclic voltammogram was recorded in the range of -0.7 to 0.5 V as well as an electrochemical impedance spectroscopy and electrochemical quartz crystal microbalance (EIS and EQCM). the main characteristic is the huge increase in the charge transfer resistance (r(ct)), which indicates that the insertion process of ions in the polymer matrix is hindered by the electrochemical degradation. Once the process of insertion is damaged, the number of intercalated ions in the matrix should decrease, which is expressed by the low-frequency capacitance, which is proportional to the number of intercalated ions in the polymeric matrix. the decrease of intercalated ions has an influence in the mass variation of the polymer film, which is confirmed by EQCM measurements. en
dc.description.sponsorship Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorship Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorship Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent 9570-9575
dc.language.iso eng
dc.publisher Amer Chemical Soc
dc.relation.ispartof Journal of Physical Chemistry B
dc.rights Acesso restrito
dc.title Investigation of Polypyrrole Degradation Using Electrochemical Impedance Spectroscopy en
dc.type Artigo
dc.contributor.institution Universidade Federal de São Carlos (UFSCar)
dc.contributor.institution Universidade Federal de São Paulo (UNIFESP)
dc.description.affiliation Univ Fed Sao Carlos, Lab Interdisciplinar Eletroquim & Ceram, Ctr Multidisciplinar, Dept Quim, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliation UNIFESP, Dept Ciencias Exatas & Terra, BR-09972270 Diadema, SP, Brazil
dc.description.affiliationUnifesp UNIFESP, Dept Ciencias Exatas & Terra, BR-09972270 Diadema, SP, Brazil
dc.identifier.doi 10.1021/jp2041263
dc.description.source Web of Science
dc.identifier.wos WOS:000293420000007



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