A Ring-Disk Study of HOBr Formation at Platinum Electrodes in 1.0M H2SO4

D. C. Johnson; Stanley Bruckenstein

doi:10.1149/1.2407543

A Ring-Disk Study of HOBr Formation at Platinum Electrodes in 1.0M H²SO⁴

D. C. Johnson
, Stanley Bruckenstein

Chemistry

Iowa State University

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

37 Scopus citations

Abstract

The rotating ling-disk electrode (RRDE) was used to study the oxidation of Br⁻ at platinum electrodes in 1.0M H²SO⁴ supporting electrolyte. In addition to the electrochemical oxidation of Br⁻ to Br² by a convective-diffusion controlled reaction, a small amount of HOBr was produced by oxidation of adsorbed Br⁻ with concurrent oxidation of the platinum electrode surface. Bromide does not adsorb at an anodized platinum surface, whereas adsorption is very rapid at a reduced platinum surface. The equilibrium surface coverage by Br⁻ corresponds to a monolayer for bulk concentrations of KBr greater than 4.5 x 10⁻³M.

Original language	English
Pages (from-to)	460-467
Number of pages	8
Journal	Journal of the Electrochemical Society
Volume	117
Issue number	4
DOIs	https://doi.org/10.1149/1.2407543
State	Published - Apr 1970

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title = "A Ring-Disk Study of HOBr Formation at Platinum Electrodes in 1.0M H2SO4",

abstract = "The rotating ling-disk electrode (RRDE) was used to study the oxidation of Br− at platinum electrodes in 1.0M H2SO4 supporting electrolyte. In addition to the electrochemical oxidation of Br− to Br2 by a convective-diffusion controlled reaction, a small amount of HOBr was produced by oxidation of adsorbed Br− with concurrent oxidation of the platinum electrode surface. Bromide does not adsorb at an anodized platinum surface, whereas adsorption is very rapid at a reduced platinum surface. The equilibrium surface coverage by Br− corresponds to a monolayer for bulk concentrations of KBr greater than 4.5 x 10−3M.",

author = "Johnson, \{D. C.\} and Stanley Bruckenstein",

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AU - Johnson, D. C.

AU - Bruckenstein, Stanley

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N2 - The rotating ling-disk electrode (RRDE) was used to study the oxidation of Br− at platinum electrodes in 1.0M H2SO4 supporting electrolyte. In addition to the electrochemical oxidation of Br− to Br2 by a convective-diffusion controlled reaction, a small amount of HOBr was produced by oxidation of adsorbed Br− with concurrent oxidation of the platinum electrode surface. Bromide does not adsorb at an anodized platinum surface, whereas adsorption is very rapid at a reduced platinum surface. The equilibrium surface coverage by Br− corresponds to a monolayer for bulk concentrations of KBr greater than 4.5 x 10−3M.

AB - The rotating ling-disk electrode (RRDE) was used to study the oxidation of Br− at platinum electrodes in 1.0M H2SO4 supporting electrolyte. In addition to the electrochemical oxidation of Br− to Br2 by a convective-diffusion controlled reaction, a small amount of HOBr was produced by oxidation of adsorbed Br− with concurrent oxidation of the platinum electrode surface. Bromide does not adsorb at an anodized platinum surface, whereas adsorption is very rapid at a reduced platinum surface. The equilibrium surface coverage by Br− corresponds to a monolayer for bulk concentrations of KBr greater than 4.5 x 10−3M.

UR - https://www.scopus.com/pages/publications/84975362900

U2 - 10.1149/1.2407543

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SP - 460

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JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

IS - 4

ER -

A Ring-Disk Study of HOBr Formation at Platinum Electrodes in 1.0M H²SO⁴

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