Electrochemical Characterization of Electronically Conductive Polypyrrole on Cyclic Voltammograms

Yeu, Taewhan; Yin, Ken‐Ming; Carbajal, J. L.; White, Ralph E.

doi:10.1149/1.2085332

Cited by 57 publications

(31 citation statements)

References 27 publications

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“…Fig. 2 shows cyclic voltammograms of composite electrodes of PPy and Sr substituted manganites recorded between −0.8 and +0.6 V versus SCE at the scan rate of 10 mV s −1 in an Ar deoxygenated aqueous solution of 5 mmol dm −3 KOH and 0.5 mol dm −3 K 2 SO 4 at 25 • C. These voltammograms are almost similar to that of pure PPy electrode already reported in literature [7,23,25,34,35]. Thus the observed anodic current peak potential at E pa = −0.25 ± 0.03 V versus SCE, and cathodic peak potential at E pc = −0.33 ± 0.04 V versus SCE are produced mainly due to involvement of the redox couple [PPy + , SO 4 2− ]/PPy, and of the redox reaction above.…”

Section: Cyclic Voltammetrysupporting

confidence: 79%

Polypyrrole and La1−xSrxMnO3 (0≤x≤0.4) composite electrodes for electroreduction of oxygen in alkaline medium

Singh

Malviya

Anindita

et al. 2007

Electrochimica Acta

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Section: Cyclic Voltammetrysupporting

confidence: 79%

Polypyrrole and La1−xSrxMnO3 (0≤x≤0.4) composite electrodes for electroreduction of oxygen in alkaline medium

Singh

Malviya

Anindita

et al. 2007

Electrochimica Acta

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“…Mechanisms of electron-ion coupling in conductive polymers are ex- [59]. A typical cyclic voltammogram of a conducting polymer reveals an oxidation peak followed by a current plateau ( see Figure 3.4.1 ).…”

Section: Charge Transport Models For Conductive Polymersmentioning

confidence: 99%

“…A variety of theoretical models have been proposed in attempt to explain the charging mechanism in conducting polymers. [60,59,61,62,63]. However, the standard electrochemical models considering only the faradaic current result in cyclic voltammogramms exhibiting the peaks but failing to reproduce the plateaus [60,59,61].…”

Section: Charge Transport Models For Conductive Polymersmentioning

confidence: 99%

“…However, the standard electrochemical models considering only the faradaic current result in cyclic voltammogramms exhibiting the peaks but failing to reproduce the plateaus [60,59,61]. With the goal to reproduce the plateaus, the model have been proposed by Feldberg [60] in which the total current is a sum of the faradaic current associated with electrochemical reactions and a phenomenological capacitive current which is proportional to the amount of charges in oxidized polymer [59,61]. Otero et.…”

Section: Charge Transport Models For Conductive Polymersmentioning

confidence: 99%

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Ionic and electronic transport in electrochemical and polymer based systems

Volkov

2017

Linköping Studies in Science and Technology. Dissertations

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Description of the cover image:An ion exchange membrane Ionic and electronic transport in electrochemical and polymer based systemsCopyright © 2017 Anton Volkov (unless otherwise noted) Division of Physics and Electronics Department of Science and TechnologyLinköping University SE-601 74 Norrköping, Sweden Norrköping, March 2017 ISBN: 978-91-7685-548-5 ISSN 0345-7524 Printed in Sweden by LiU-Tryck, Linköping, 2017 Electronic publication: www.ep.liu.seTo my parents, Alla and Vyacheslav. AbstractElectrochemical systems, which rely on coupled phenomena of the chemical change and electricity, have been utilized for development an interface between biological systems and conventional electronics. The development and detailed understanding of the operation mechanism of such interfaces have a great importance to many fields within life science and conventional electronics. Conducting polymer materials are extensively used as a building block in various applications due to their ability to transduce chemical signal to electrical one and vice versa. The mechanism of the coupling between the mass and charge transfer in electrochemical systems, and particularly in conductive polymer based system, is highly complex and depends on various physical and chemical properties of the materials composing the system of interest.The aims of this thesis have been to study electrochemical systems including conductive polymer based systems and provide knowledge for future development of the devices, which can operate with both chemical and electrical signals. Within the thesis, we studied the operation mechanism of ion bipolar junction transistor (IBJT), which have been previously utilized to modulate delivery of charged molecules. We analysed the different operation modes of IBJT and transition between them on the basis of detailed concentration and potential profiles provided by the model.We also performed investigation of capacitive charging in conductive PEDOT:PSS polymer electrode. We demonstrated that capacitive charging of PEDOT:PSS electrode at the cyclic voltammetry, can be understood within a modified Nernst-Planck-Poisson formalism for two phase system in terms of the coupled ion-electron diffusion and migration without invoking the assumption of any redox reactions.Further, we studied electronic structure and optical properties of a self-doped p-type conducting polymer, which can polymerize itself along the stem of the plants. We performed ab initio calculations for this system in undoped, polaron and bipolaron electronic states.Comparison with experimental data confirmed the formation of undoped or bipolaron states in polymer film depending on applied biases.Finally, we performed simulation of the reduction-oxidation reaction at microband array electrodes. We showed that faradaic current density at microband array electrodes increases due to non-linear mass transport on the microscale compared to the corresponding macroscale systems. The studied microband array electrode was used for developing a laccase-based micro...

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“…The conformational movements stimulated by the extraction or injection of electrons from, or towards, the chains transform single bonds into double bonds [4], changing bond angles between monomeric units and promoting conformational movement and generation or destruction of free volume [5,6]. Penetration or expulsion of counterions guarantee both, charge balance inside the material and changes of volume [7].…”

Section: Introductionmentioning

confidence: 99%