Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part III: Effect of temperature

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

doi:10.1016/S0013-4686(98)00369-7

Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part III: Effect of temperature

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

^*Corresponding author for this work

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

58 Citations (Scopus)

Abstract

The electrochemical oxidation of H₂O₂ at a platinum rotating disc electrode was studied in 0.1 M phosphate buffer at pH 7.26 for the [H₂O₂] range 0-40 mM, rotation rates 630-10000 rpm and anodic potential +264 to +712 mV vs. Ag/AgCl using staircase potentiometry over the temperature range 5-35°C. The results were interpreted in terms of a surface binding site model involving two modes of product inhibition. Potential- and temperature-invariant values of the constants for H₂O₂, H⁺ and O₂ binding were determined and the rate constants for reduction and the re-oxidation of the binding site as a function of potential and temperature were evaluated together with the activation energy for the reduction of the binding site.

Original language	English
Pages (from-to)	2455-2462
Number of pages	8
Journal	Electrochimica Acta
Volume	44
Issue number	14
DOIs	https://doi.org/10.1016/S0013-4686(98)00369-7
Publication status	Published - Mar 1 1999
Externally published	Yes

Keywords

Hydrogen peroxide
Mechanism
Oxidation
Platinum
Rotating disc electrode

ASJC Scopus subject areas

Chemical Engineering(all)
Electrochemistry

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10.1016/S0013-4686(98)00369-7

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title = "Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part III: Effect of temperature",

abstract = "The electrochemical oxidation of H2O2 at a platinum rotating disc electrode was studied in 0.1 M phosphate buffer at pH 7.26 for the [H2O2] range 0-40 mM, rotation rates 630-10000 rpm and anodic potential +264 to +712 mV vs. Ag/AgCl using staircase potentiometry over the temperature range 5-35°C. The results were interpreted in terms of a surface binding site model involving two modes of product inhibition. Potential- and temperature-invariant values of the constants for H2O2, H+ and O2 binding were determined and the rate constants for reduction and the re-oxidation of the binding site as a function of potential and temperature were evaluated together with the activation energy for the reduction of the binding site.",

keywords = "Hydrogen peroxide, Mechanism, Oxidation, Platinum, Rotating disc 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 1996 and 1997) for contributions to the funding for this work and Assoc. Prof. G.R. Hedwig for performing the vibrating-tube density measurement at 25°C. ",

year = "1999",

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doi = "10.1016/S0013-4686(98)00369-7",

language = "English",

volume = "44",

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journal = "Electrochimica Acta",

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TY - JOUR

T1 - Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part III

T2 - Effect of temperature

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 1996 and 1997) for contributions to the funding for this work and Assoc. Prof. G.R. Hedwig for performing the vibrating-tube density measurement at 25°C.

PY - 1999/3/1

Y1 - 1999/3/1

N2 - The electrochemical oxidation of H2O2 at a platinum rotating disc electrode was studied in 0.1 M phosphate buffer at pH 7.26 for the [H2O2] range 0-40 mM, rotation rates 630-10000 rpm and anodic potential +264 to +712 mV vs. Ag/AgCl using staircase potentiometry over the temperature range 5-35°C. The results were interpreted in terms of a surface binding site model involving two modes of product inhibition. Potential- and temperature-invariant values of the constants for H2O2, H+ and O2 binding were determined and the rate constants for reduction and the re-oxidation of the binding site as a function of potential and temperature were evaluated together with the activation energy for the reduction of the binding site.

AB - The electrochemical oxidation of H2O2 at a platinum rotating disc electrode was studied in 0.1 M phosphate buffer at pH 7.26 for the [H2O2] range 0-40 mM, rotation rates 630-10000 rpm and anodic potential +264 to +712 mV vs. Ag/AgCl using staircase potentiometry over the temperature range 5-35°C. The results were interpreted in terms of a surface binding site model involving two modes of product inhibition. Potential- and temperature-invariant values of the constants for H2O2, H+ and O2 binding were determined and the rate constants for reduction and the re-oxidation of the binding site as a function of potential and temperature were evaluated together with the activation energy for the reduction of the binding site.

KW - Hydrogen peroxide

KW - Mechanism

KW - Oxidation

KW - Platinum

KW - Rotating disc electrode

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U2 - 10.1016/S0013-4686(98)00369-7

DO - 10.1016/S0013-4686(98)00369-7

M3 - Article

AN - SCOPUS:0032757228

SN - 0013-4686

VL - 44

SP - 2455

EP - 2462

JO - Electrochimica Acta

JF - Electrochimica Acta

IS - 14

ER -

Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part III: Effect of temperature

Abstract

Keywords

ASJC Scopus subject areas

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