Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part 1. An adsorption-controlled mechanism

Simon B. Hall; Emad A. Khudaish; Alan L. Hart

doi:10.1016/S0013-4686(97)00125-4

Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part 1. An adsorption-controlled mechanism

Simon B. Hall^*, Emad A. Khudaish, Alan L. Hart

^*Corresponding author for this work

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

192 Citations (SciVal)

Abstract

The electrochemical oxidation of H₂O₂ at a platinum rotating disk electrode was studied at pH 7.26 for the [H₂O₂] range 0-80 mM and for rotation rates 630-10,000 r.p.m. A mechanism is proposed to account for the steady-state current response as a function of both rotation rate and [H₂O₂]. The mechanism incorporates reversible binding of hydrogen peroxide to electrochemically generated Pt(II) surface sites with inhibiting competitive adsorption of dioxygen at these sites. A further inhibiting side reaction is also identified involving protonation of the surface adsorbed H₂O₂ complex.

Original language	English
Pages (from-to)	579-588
Number of pages	10
Journal	Electrochimica Acta
Volume	43
Issue number	5-6
DOIs	https://doi.org/10.1016/S0013-4686(97)00125-4
Publication status	Published - Nov 28 1997
Externally published	Yes

Keywords

Hydrogen peroxide
Mechanism
Oxidation
Platinum
Rotating disk electrode

ASJC Scopus subject areas

Chemical Engineering(all)
Electrochemistry

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10.1016/S0013-4686(97)00125-4

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title = "Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part 1. An adsorption-controlled mechanism",

abstract = "The electrochemical oxidation of H2O2 at a platinum rotating disk electrode was studied at pH 7.26 for the [H2O2] range 0-80 mM and for rotation rates 630-10,000 r.p.m. A mechanism is proposed to account for the steady-state current response as a function of both rotation rate and [H2O2]. The mechanism incorporates reversible binding of hydrogen peroxide to electrochemically generated Pt(II) surface sites with inhibiting competitive adsorption of dioxygen at these sites. A further inhibiting side reaction is also identified involving protonation of the surface adsorbed H2O2 complex.",

keywords = "Hydrogen peroxide, Mechanism, Oxidation, Platinum, Rotating disk electrode",

author = "Hall, {Simon B.} and Khudaish, {Emad A.} and Hart, {Alan L.}",

note = "Funding Information: The authors wish to acknowledge the Massey University Research and Research Equipment Fund {"}MURF and MUREF 0885# for contributions to the funding of this work[",

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doi = "10.1016/S0013-4686(97)00125-4",

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journal = "Electrochimica Acta",

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TY - JOUR

T1 - Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part 1. An adsorption-controlled mechanism

AU - Hall, Simon B.

AU - Khudaish, Emad A.

AU - Hart, Alan L.

N1 - Funding Information: The authors wish to acknowledge the Massey University Research and Research Equipment Fund "MURF and MUREF 0885# for contributions to the funding of this work[

PY - 1997/11/28

Y1 - 1997/11/28

N2 - The electrochemical oxidation of H2O2 at a platinum rotating disk electrode was studied at pH 7.26 for the [H2O2] range 0-80 mM and for rotation rates 630-10,000 r.p.m. A mechanism is proposed to account for the steady-state current response as a function of both rotation rate and [H2O2]. The mechanism incorporates reversible binding of hydrogen peroxide to electrochemically generated Pt(II) surface sites with inhibiting competitive adsorption of dioxygen at these sites. A further inhibiting side reaction is also identified involving protonation of the surface adsorbed H2O2 complex.

AB - The electrochemical oxidation of H2O2 at a platinum rotating disk electrode was studied at pH 7.26 for the [H2O2] range 0-80 mM and for rotation rates 630-10,000 r.p.m. A mechanism is proposed to account for the steady-state current response as a function of both rotation rate and [H2O2]. The mechanism incorporates reversible binding of hydrogen peroxide to electrochemically generated Pt(II) surface sites with inhibiting competitive adsorption of dioxygen at these sites. A further inhibiting side reaction is also identified involving protonation of the surface adsorbed H2O2 complex.

KW - Hydrogen peroxide

KW - Mechanism

KW - Oxidation

KW - Platinum

KW - Rotating disk electrode

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U2 - 10.1016/S0013-4686(97)00125-4

DO - 10.1016/S0013-4686(97)00125-4

M3 - Article

AN - SCOPUS:0032313338

SN - 0013-4686

VL - 43

SP - 579

EP - 588

JO - Electrochimica Acta

JF - Electrochimica Acta

IS - 5-6

ER -

Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part 1. An adsorption-controlled mechanism

Abstract

Keywords

ASJC Scopus subject areas

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