NDLI: Ring–disc electrodes. Part 22.—Theory of the measurement of proton fluxes at the disc

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Ring–disc electrodes. Part 22.—Theory of the measurement of proton fluxes at the disc

Content Provider	Royal Society of Chemistry (RSC)
Author	Albery, W. John Mount, Andrew R.
Copyright Year	1989
Abstract	Proton fluxes at the disc of a ring–disc electrode can be measured by potentiometric measurement with a bismuth oxide ring electrode. When the bulk pH is close to 7, fluxes as low as 10–12 mol s–1 cm–2 can be measured. Theory is developed to describe the relation between the disc flux and the ring pH, allowing for the fact that the diffusion layer may be divided into an H+ region and an OH– region with a titration reaction taking place on the interface between the regions. Analytical expressions, allowing for the different diffusion coefficients of H+ and OH–, are derived for four separate cases. A case diagram is constructed to show the interrelation between the different cases and to show the relation between the disc flux, the bulk pH and the pH at the ring.
Starting Page	1181
Ending Page	1188
Page Count	8
File Format	PDF
ISSN	03009599
Volume Number	85
Issue Number	5
Journal	Journal of the Chemical Society, Faraday Transactions 1
DOI	10.1039/F19898501181
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Electrode Proton PH Bismuth(III) oxide Titration Diffusion Hydrogen ion
Content Type	Text
Resource Type	Article
Subject	Chemistry

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