Cathodic reduction of oxygen and hydrogen peroxide at cobalt and iron crowned phthalocyanines adsorbed on highly oriented pyrolytic graphite electrodes

Nagao Kobayashi; Pavel Janda; A. B.P. Lever

doi:10.1021/ic00051a006

Cathodic reduction of oxygen and hydrogen peroxide at cobalt and iron crowned phthalocyanines adsorbed on highly oriented pyrolytic graphite electrodes

Nagao Kobayashi, Pavel Janda, A. B.P. Lever

SCI - Chemistry

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

119 Citations (Scopus)

Abstract

The surface electrochemistry of iron and cobalt crowned phthalocyanine (Fe^IICRPc(-2) and Co^IICRPc(-2)) adsorbed on a highly oriented pyrolytic graphite (HOPG) electrode has been explored under an argon atmosphere. The redox processes of surface bound Co^IICRPc(-2)/[Co^ICRPc(-2)]-, [Fe^IIICRPc(-2)]⁺/Fe^IICRPc(-2), and Fe^II-CRPc(-2)/[Fe^ICRPc(-2)]- couples were identified and their pH dependence reported in the range 1-13. Under an oxygen atmosphere at the Co^IICRPc(-2)/HOPG electrode, two reduction processes, oxygen to hydrogen peroxide and hydrogen peroxide to water, were clearly delineated and their pH dependences explored. Surface bound Fe^II-CRPc(-2) catalyzes the four-electron reduction of oxygen in alkaline medium. The Co^IICRPc(-2)/HOPG electrode is very stable both in the presence and absence of oxygen, but the Fe^IICRPc(-2)/HOPG electrode is much less stable when electrocatalytic oxygen reduction takes place on its surface.

Original language	English
Pages (from-to)	5172-5177
Number of pages	6
Journal	Inorganic chemistry
Volume	31
Issue number	25
DOIs	https://doi.org/10.1021/ic00051a006
Publication status	Published - 1992

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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@article{54fc1604573a41d48252f32161d3fe25,

title = "Cathodic reduction of oxygen and hydrogen peroxide at cobalt and iron crowned phthalocyanines adsorbed on highly oriented pyrolytic graphite electrodes",

abstract = "The surface electrochemistry of iron and cobalt crowned phthalocyanine (FeIICRPc(-2) and CoIICRPc(-2)) adsorbed on a highly oriented pyrolytic graphite (HOPG) electrode has been explored under an argon atmosphere. The redox processes of surface bound CoIICRPc(-2)/[CoICRPc(-2)]-, [FeIIICRPc(-2)]+/FeIICRPc(-2), and FeII-CRPc(-2)/[FeICRPc(-2)]- couples were identified and their pH dependence reported in the range 1-13. Under an oxygen atmosphere at the CoIICRPc(-2)/HOPG electrode, two reduction processes, oxygen to hydrogen peroxide and hydrogen peroxide to water, were clearly delineated and their pH dependences explored. Surface bound FeII-CRPc(-2) catalyzes the four-electron reduction of oxygen in alkaline medium. The CoIICRPc(-2)/HOPG electrode is very stable both in the presence and absence of oxygen, but the FeIICRPc(-2)/HOPG electrode is much less stable when electrocatalytic oxygen reduction takes place on its surface.",

author = "Nagao Kobayashi and Pavel Janda and Lever, {A. B.P.}",

year = "1992",

doi = "10.1021/ic00051a006",

language = "English",

volume = "31",

pages = "5172--5177",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "25",

}

TY - JOUR

T1 - Cathodic reduction of oxygen and hydrogen peroxide at cobalt and iron crowned phthalocyanines adsorbed on highly oriented pyrolytic graphite electrodes

AU - Kobayashi, Nagao

AU - Janda, Pavel

AU - Lever, A. B.P.

PY - 1992

Y1 - 1992

N2 - The surface electrochemistry of iron and cobalt crowned phthalocyanine (FeIICRPc(-2) and CoIICRPc(-2)) adsorbed on a highly oriented pyrolytic graphite (HOPG) electrode has been explored under an argon atmosphere. The redox processes of surface bound CoIICRPc(-2)/[CoICRPc(-2)]-, [FeIIICRPc(-2)]+/FeIICRPc(-2), and FeII-CRPc(-2)/[FeICRPc(-2)]- couples were identified and their pH dependence reported in the range 1-13. Under an oxygen atmosphere at the CoIICRPc(-2)/HOPG electrode, two reduction processes, oxygen to hydrogen peroxide and hydrogen peroxide to water, were clearly delineated and their pH dependences explored. Surface bound FeII-CRPc(-2) catalyzes the four-electron reduction of oxygen in alkaline medium. The CoIICRPc(-2)/HOPG electrode is very stable both in the presence and absence of oxygen, but the FeIICRPc(-2)/HOPG electrode is much less stable when electrocatalytic oxygen reduction takes place on its surface.

AB - The surface electrochemistry of iron and cobalt crowned phthalocyanine (FeIICRPc(-2) and CoIICRPc(-2)) adsorbed on a highly oriented pyrolytic graphite (HOPG) electrode has been explored under an argon atmosphere. The redox processes of surface bound CoIICRPc(-2)/[CoICRPc(-2)]-, [FeIIICRPc(-2)]+/FeIICRPc(-2), and FeII-CRPc(-2)/[FeICRPc(-2)]- couples were identified and their pH dependence reported in the range 1-13. Under an oxygen atmosphere at the CoIICRPc(-2)/HOPG electrode, two reduction processes, oxygen to hydrogen peroxide and hydrogen peroxide to water, were clearly delineated and their pH dependences explored. Surface bound FeII-CRPc(-2) catalyzes the four-electron reduction of oxygen in alkaline medium. The CoIICRPc(-2)/HOPG electrode is very stable both in the presence and absence of oxygen, but the FeIICRPc(-2)/HOPG electrode is much less stable when electrocatalytic oxygen reduction takes place on its surface.

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U2 - 10.1021/ic00051a006

DO - 10.1021/ic00051a006

M3 - Article

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SN - 0020-1669

VL - 31

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JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 25

ER -

Cathodic reduction of oxygen and hydrogen peroxide at cobalt and iron crowned phthalocyanines adsorbed on highly oriented pyrolytic graphite electrodes

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