Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part IV: Phosphate buffer dependence

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

doi:10.1016/S0013-4686(99)00183-8

Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part IV: Phosphate buffer dependence

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

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

50 Citations (Scopus)

Abstract

The electrochemical oxidation of H₂O₂ at platinum rotating disc electrodes and microelectrodes was studied as a function of phosphate buffer concentration in the range 0-100 mM and pH from pH 4 to pH 10. The results were interpreted in terms of development of a surface binding site for H₂O₂ from a precursor site through interaction with H₂PO₄^- from the electrolyte. In the absence of phosphate an alternative binding site mechanism was evident. The precursor site was shown to be inhibited by protons at low pH producing an inactive site.

Original language	English
Pages (from-to)	4573-4582
Number of pages	10
Journal	Electrochimica Acta
Volume	44
Issue number	25
DOIs	https://doi.org/10.1016/S0013-4686(99)00183-8
Publication status	Published - Aug 1999
Externally published	Yes

ASJC Scopus subject areas

Chemical Engineering(all)
Electrochemistry

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10.1016/S0013-4686(99)00183-8

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title = "Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part IV: Phosphate buffer dependence",

abstract = "The electrochemical oxidation of H2O2 at platinum rotating disc electrodes and microelectrodes was studied as a function of phosphate buffer concentration in the range 0-100 mM and pH from pH 4 to pH 10. The results were interpreted in terms of development of a surface binding site for H2O2 from a precursor site through interaction with H2PO4- from the electrolyte. In the absence of phosphate an alternative binding site mechanism was evident. The precursor site was shown to be inhibited by protons at low pH producing an inactive site.",

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.",

year = "1999",

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doi = "10.1016/S0013-4686(99)00183-8",

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journal = "Electrochimica Acta",

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

T2 - Phosphate buffer dependence

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.

PY - 1999/8

Y1 - 1999/8

N2 - The electrochemical oxidation of H2O2 at platinum rotating disc electrodes and microelectrodes was studied as a function of phosphate buffer concentration in the range 0-100 mM and pH from pH 4 to pH 10. The results were interpreted in terms of development of a surface binding site for H2O2 from a precursor site through interaction with H2PO4- from the electrolyte. In the absence of phosphate an alternative binding site mechanism was evident. The precursor site was shown to be inhibited by protons at low pH producing an inactive site.

AB - The electrochemical oxidation of H2O2 at platinum rotating disc electrodes and microelectrodes was studied as a function of phosphate buffer concentration in the range 0-100 mM and pH from pH 4 to pH 10. The results were interpreted in terms of development of a surface binding site for H2O2 from a precursor site through interaction with H2PO4- from the electrolyte. In the absence of phosphate an alternative binding site mechanism was evident. The precursor site was shown to be inhibited by protons at low pH producing an inactive site.

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DO - 10.1016/S0013-4686(99)00183-8

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VL - 44

SP - 4573

EP - 4582

JO - Electrochimica Acta

JF - Electrochimica Acta

IS - 25

ER -

Electrochemical oxidation of hydrogen peroxide at platinum electrodes. Part IV: Phosphate buffer dependence

Abstract

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