Mechanism of electron transfer during the course of oxidation of N-phenyl-p-phenylenediamine polythiophene and poly-3-methylthiophene coated electrodes: Redox catalysis versus outer-sphere heterogeneous electron transfer

M. D. Levi; M. Lapkowski

doi:10.1016/0013-4686(93)85139-p

Mechanism of electron transfer during the course of oxidation of N-phenyl-p-phenylenediamine polythiophene and poly-3-methylthiophene coated electrodes: Redox catalysis versus outer-sphere heterogeneous electron transfer

M. D. Levi, M. Lapkowski

Research output: Contribution to journal › Article › peer-review

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Abstract

Comparative studies of the mechanism of anodic oxidation of N-phenyl-p-phenylenediamine (NPPD) on a bare platinum electrode as well as on platinum coated with poly-3-methylthiophene (P3MT) or polythiophene (PT) films have been carried out. The shift of the voltammetric peak potential corresponding to the first one-electron oxidation step of NPPD on coated electrodes on varying the potential scan rate or the corresponding shift of half-wave potential towards more positive values in the series Pt < Pt/P3MT < Pt/PT have been observed. Two alternative models of kinetics of solute redox reactions such as the model of catalytic reactions mediated by conventional redox-polymers and the thermodynamic model of electrochemical doping of π-conjugated polymers with regard to the kinetics of outer-sphere electron-transfer reactions have been discussed in an attempt to account for the experimental results obtained. Evidence in favour of the applicability of the second model have been summarized.

Original language	English
Pages (from-to)	271-279
Number of pages	9
Journal	Electrochimica Acta
Volume	38
Issue number	2-3
DOIs	https://doi.org/10.1016/0013-4686(93)85139-p
State	Published - Feb 1993
Externally published	Yes

Bibliographical note

Funding Information:
Acknowledgements-Wwe ould like to thank Dr G. Bidan for his kind invitationt o visit the Laboratoryo f Molecular ElectrochemistryC,e ntred ’EtudesN ucltairesd e Grenoble (France)d uring which the presentw ork was carried out. We are also gratefult o Dr E. Vieil of the samel aboratory for his spirited discussiono f the resultso btainedi n this work.

Funding

Acknowledgements-Wwe ould like to thank Dr G. Bidan for his kind invitationt o visit the Laboratoryo f Molecular ElectrochemistryC,e ntred ’EtudesN ucltairesd e Grenoble (France)d uring which the presentw ork was carried out. We are also gratefult o Dr E. Vieil of the samel aboratory for his spirited discussiono f the resultso btainedi n this work.

Funders	Funder number
Laboratoryo f Molecular ElectrochemistryC,e ntred ’EtudesN ucltairesd e Grenoble

Keywords

N-phenyl-p-phenylenediamine
electron transfer.
polythiophenes
redox catalysis

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title = "Mechanism of electron transfer during the course of oxidation of N-phenyl-p-phenylenediamine polythiophene and poly-3-methylthiophene coated electrodes: Redox catalysis versus outer-sphere heterogeneous electron transfer",

abstract = "Comparative studies of the mechanism of anodic oxidation of N-phenyl-p-phenylenediamine (NPPD) on a bare platinum electrode as well as on platinum coated with poly-3-methylthiophene (P3MT) or polythiophene (PT) films have been carried out. The shift of the voltammetric peak potential corresponding to the first one-electron oxidation step of NPPD on coated electrodes on varying the potential scan rate or the corresponding shift of half-wave potential towards more positive values in the series Pt < Pt/P3MT < Pt/PT have been observed. Two alternative models of kinetics of solute redox reactions such as the model of catalytic reactions mediated by conventional redox-polymers and the thermodynamic model of electrochemical doping of π-conjugated polymers with regard to the kinetics of outer-sphere electron-transfer reactions have been discussed in an attempt to account for the experimental results obtained. Evidence in favour of the applicability of the second model have been summarized.",

keywords = "N-phenyl-p-phenylenediamine, electron transfer., polythiophenes, redox catalysis",

author = "Levi, {M. D.} and M. Lapkowski",

note = "Funding Information: Acknowledgements-Wwe ould like to thank Dr G. Bidan for his kind invitationt o visit the Laboratoryo f Molecular ElectrochemistryC,e ntred {\textquoteright}EtudesN ucltairesd e Grenoble (France)d uring which the presentw ork was carried out. We are also gratefult o Dr E. Vieil of the samel aboratory for his spirited discussiono f the resultso btainedi n this work.",

year = "1993",

month = feb,

doi = "10.1016/0013-4686(93)85139-p",

language = "אנגלית",

volume = "38",

pages = "271--279",

journal = "Electrochimica Acta",

issn = "0013-4686",

publisher = "Elsevier Ltd.",

number = "2-3",

}

Mechanism of electron transfer during the course of oxidation of N-phenyl-p-phenylenediamine polythiophene and poly-3-methylthiophene coated electrodes: Redox catalysis versus outer-sphere heterogeneous electron transfer. / Levi, M. D.; Lapkowski, M.
In: Electrochimica Acta, Vol. 38, No. 2-3, 02.1993, p. 271-279.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Mechanism of electron transfer during the course of oxidation of N-phenyl-p-phenylenediamine polythiophene and poly-3-methylthiophene coated electrodes

T2 - Redox catalysis versus outer-sphere heterogeneous electron transfer

AU - Levi, M. D.

AU - Lapkowski, M.

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N2 - Comparative studies of the mechanism of anodic oxidation of N-phenyl-p-phenylenediamine (NPPD) on a bare platinum electrode as well as on platinum coated with poly-3-methylthiophene (P3MT) or polythiophene (PT) films have been carried out. The shift of the voltammetric peak potential corresponding to the first one-electron oxidation step of NPPD on coated electrodes on varying the potential scan rate or the corresponding shift of half-wave potential towards more positive values in the series Pt < Pt/P3MT < Pt/PT have been observed. Two alternative models of kinetics of solute redox reactions such as the model of catalytic reactions mediated by conventional redox-polymers and the thermodynamic model of electrochemical doping of π-conjugated polymers with regard to the kinetics of outer-sphere electron-transfer reactions have been discussed in an attempt to account for the experimental results obtained. Evidence in favour of the applicability of the second model have been summarized.

AB - Comparative studies of the mechanism of anodic oxidation of N-phenyl-p-phenylenediamine (NPPD) on a bare platinum electrode as well as on platinum coated with poly-3-methylthiophene (P3MT) or polythiophene (PT) films have been carried out. The shift of the voltammetric peak potential corresponding to the first one-electron oxidation step of NPPD on coated electrodes on varying the potential scan rate or the corresponding shift of half-wave potential towards more positive values in the series Pt < Pt/P3MT < Pt/PT have been observed. Two alternative models of kinetics of solute redox reactions such as the model of catalytic reactions mediated by conventional redox-polymers and the thermodynamic model of electrochemical doping of π-conjugated polymers with regard to the kinetics of outer-sphere electron-transfer reactions have been discussed in an attempt to account for the experimental results obtained. Evidence in favour of the applicability of the second model have been summarized.

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Mechanism of electron transfer during the course of oxidation of N-phenyl-p-phenylenediamine polythiophene and poly-3-methylthiophene coated electrodes: Redox catalysis versus outer-sphere heterogeneous electron transfer

Abstract

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Keywords

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