The University of Southampton
University of Southampton Institutional Repository

The limiting current for reduction of ferricyanide ion at nickel: the importance of experimental conditions

Szánto, D.A., Cleghorn, S., Ponce de León, C. and Walsh, F.C. (2008) The limiting current for reduction of ferricyanide ion at nickel: the importance of experimental conditions AIChE Journal, 54, (3), pp. 802-810. (doi:10.1002/aic.11420).

Record type: Article

Abstract

Steady state, hydrodynamic voltammetry is a well established technique to measure the rate of mass transport of an electroactive species to, or from, a solid surface electrode in an aqueous electrolyte. Limiting current measurements during the reduction of ferricyanide (hexacyanoferrateIII) ion at a nickel rotating disc electrode (RDE) are critically considered, and the accuracy of the technique is quantitatively assessed. The importance of surface pretreatment, type of indifferent electrolyte, and the effect of sunlight are considered. Limiting current values can show large deviations from the values predicted by the Levich equation for laminar flow to a polished RDE when unsuitable conditions are employed, despite the appearance of well-defined limiting current plateaux. Using appropriate pretreatment and experimental procedures, the averaged mass transport coefficients or limiting currents values can be obtained, which are close to the values predicted by the Levich equation for laminar flow to a hydrodynamic smooth RDE.

PDF The_limiting_current_for_reduction_of_ferricyanide.pdf - Version of Record
Download (164kB)

More information

Submitted date: 4 December 2007
Published date: 29 January 2008
Keywords: activation of electrodes, convective diffusion, electrochemical mass transport, ferricyanide hexacyanoferrate(III) ion, nickel electrode surfaces, limiting current, rotating disc electrode, pretreatment of electrode surfaces, rde, voltammetry
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 50295
URI: http://eprints.soton.ac.uk/id/eprint/50295
ISSN: 0001-1541
PURE UUID: 09560833-5a34-47f1-a1f6-31fbe21eafaa

Catalogue record

Date deposited: 13 Feb 2008
Last modified: 17 Jul 2017 14:53

Export record

Altmetrics

Contributors

Author: D.A. Szánto
Author: S. Cleghorn
Author: F.C. Walsh

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×