Electroprecipitation of Ag(II)/Ag(III) tetraphenylsulfonate porphyrin and electrocatalytic behavior of the films

I. Zilbermann; J. Hayon; E. Maimon; R. Ydgar; E. Korin; A. Bettelheim

doi:10.1016/S1388-2481(02)00465-4

Electroprecipitation of Ag(II)/Ag(III) tetraphenylsulfonate porphyrin and electrocatalytic behavior of the films

I. Zilbermann, J. Hayon, E. Maimon, R. Ydgar, E. Korin, A. Bettelheim

Department of Chemical Engineering

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

10 Scopus citations

Abstract

The electrochemical precipitation on glassy carbon and gold electrodes of Ag(II) tetraphenylsulfonate porphyrin (Ag(II)TPPS) from aqueous HClO₄ solutions, is reported. Electrochemical quartz crystal microbalance (EQCM) results indicate the possible formation of an Ag(II)-Ag(III) porphyrin dimer species. This species is oxidized and reduced in two consecutive steps: oxidation at +0.31 and +0.36 V (vs. SCE) and reduction at +0.11 and +0.07 V. The films show catalytic behavior toward O₂ reduction in 10^-2 M HClO₄ at relatively low potentials (E < -0.1 V) but catalyze NO reduction at relatively high-reduction potentials (E < 0.4 V). The electrochemical results seem to indicate that the catalytic cycle in the case of NO involves formation of Ag(II)TPPS- Ag(II)TPPS(NO)⁺ and its electroreduction to regenerate Ag(II)TPPS-Ag(III)TPPS and NO-reduction products.

Original language	English
Pages (from-to)	862-865
Number of pages	4
Journal	Electrochemistry Communications
Volume	4
Issue number	11
DOIs	https://doi.org/10.1016/S1388-2481(02)00465-4
State	Published - 1 Nov 2002

Keywords

Electrocatalysis
Electroprecipitation
O and NO reduction
Silver tetraphenylsulfonate porphyrin

ASJC Scopus subject areas

Electrochemistry

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10.1016/S1388-2481(02)00465-4

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title = "Electroprecipitation of Ag(II)/Ag(III) tetraphenylsulfonate porphyrin and electrocatalytic behavior of the films",

abstract = "The electrochemical precipitation on glassy carbon and gold electrodes of Ag(II) tetraphenylsulfonate porphyrin (Ag(II)TPPS) from aqueous HClO4 solutions, is reported. Electrochemical quartz crystal microbalance (EQCM) results indicate the possible formation of an Ag(II)-Ag(III) porphyrin dimer species. This species is oxidized and reduced in two consecutive steps: oxidation at +0.31 and +0.36 V (vs. SCE) and reduction at +0.11 and +0.07 V. The films show catalytic behavior toward O2 reduction in 10-2 M HClO4 at relatively low potentials (E < -0.1 V) but catalyze NO reduction at relatively high-reduction potentials (E < 0.4 V). The electrochemical results seem to indicate that the catalytic cycle in the case of NO involves formation of Ag(II)TPPS- Ag(II)TPPS(NO)+ and its electroreduction to regenerate Ag(II)TPPS-Ag(III)TPPS and NO-reduction products.",

keywords = "Electrocatalysis, Electroprecipitation, O and NO reduction, Silver tetraphenylsulfonate porphyrin",

author = "I. Zilbermann and J. Hayon and E. Maimon and R. Ydgar and E. Korin and A. Bettelheim",

year = "2002",

month = nov,

day = "1",

doi = "10.1016/S1388-2481(02)00465-4",

language = "English",

volume = "4",

pages = "862--865",

journal = "Electrochemistry Communications",

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T1 - Electroprecipitation of Ag(II)/Ag(III) tetraphenylsulfonate porphyrin and electrocatalytic behavior of the films

AU - Zilbermann, I.

AU - Hayon, J.

AU - Maimon, E.

AU - Ydgar, R.

AU - Korin, E.

AU - Bettelheim, A.

PY - 2002/11/1

Y1 - 2002/11/1

N2 - The electrochemical precipitation on glassy carbon and gold electrodes of Ag(II) tetraphenylsulfonate porphyrin (Ag(II)TPPS) from aqueous HClO4 solutions, is reported. Electrochemical quartz crystal microbalance (EQCM) results indicate the possible formation of an Ag(II)-Ag(III) porphyrin dimer species. This species is oxidized and reduced in two consecutive steps: oxidation at +0.31 and +0.36 V (vs. SCE) and reduction at +0.11 and +0.07 V. The films show catalytic behavior toward O2 reduction in 10-2 M HClO4 at relatively low potentials (E < -0.1 V) but catalyze NO reduction at relatively high-reduction potentials (E < 0.4 V). The electrochemical results seem to indicate that the catalytic cycle in the case of NO involves formation of Ag(II)TPPS- Ag(II)TPPS(NO)+ and its electroreduction to regenerate Ag(II)TPPS-Ag(III)TPPS and NO-reduction products.

AB - The electrochemical precipitation on glassy carbon and gold electrodes of Ag(II) tetraphenylsulfonate porphyrin (Ag(II)TPPS) from aqueous HClO4 solutions, is reported. Electrochemical quartz crystal microbalance (EQCM) results indicate the possible formation of an Ag(II)-Ag(III) porphyrin dimer species. This species is oxidized and reduced in two consecutive steps: oxidation at +0.31 and +0.36 V (vs. SCE) and reduction at +0.11 and +0.07 V. The films show catalytic behavior toward O2 reduction in 10-2 M HClO4 at relatively low potentials (E < -0.1 V) but catalyze NO reduction at relatively high-reduction potentials (E < 0.4 V). The electrochemical results seem to indicate that the catalytic cycle in the case of NO involves formation of Ag(II)TPPS- Ag(II)TPPS(NO)+ and its electroreduction to regenerate Ag(II)TPPS-Ag(III)TPPS and NO-reduction products.

KW - Electrocatalysis

KW - Electroprecipitation

KW - O and NO reduction

KW - Silver tetraphenylsulfonate porphyrin

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U2 - 10.1016/S1388-2481(02)00465-4

DO - 10.1016/S1388-2481(02)00465-4

M3 - Article

AN - SCOPUS:0036849131

SN - 1388-2481

VL - 4

SP - 862

EP - 865

JO - Electrochemistry Communications

JF - Electrochemistry Communications

IS - 11

ER -

Electroprecipitation of Ag(II)/Ag(III) tetraphenylsulfonate porphyrin and electrocatalytic behavior of the films

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Keywords

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