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An HMV mapping study of a pulsating jet system

An HMV mapping study of a pulsating jet system
An HMV mapping study of a pulsating jet system
A new system for the generation of hydrodynamic modulated voltammetry (HMV) is presented. This system consists of an oscillating jet produced through the mechanical vibration of a large diaphragm. The structure of the cell is such that a relatively small vibration is transferred to a large fluid flow at the jet outlet. Positioning of an electrode (Pt, 0.5 mm or 25 ?m diameter) over the exit of this jet enables the detection of the modulated flow of liquid. While this flow creates modest mass transfer rates (time averaged 0.015 cm s?1) it can also be used to create a HMV system where a ‘lock-in’ approach is adopted to investigate the redox chemistry in question. This is demonstrated for the redox system. Here ‘lock-in’ to the modulated hydrodynamic signal is achieved through the deployment of bespoke software. The apparatus and procedure is shown to produce a simple and efficient way to obtain the desired signal. In addition the spatial variation of the HMV signal, phase correction and time averaged current with respect to the jet orifice is presented.
hydrodynamic modulation, jet, electrochemistry, microelectrode, mapping
1572-6657
185-193
Kuleshova, Jekaterina
95594d04-c0e8-4a1f-b5cf-b3f90b314dd6
Birkin, Peter R.
ba466560-f27c-418d-89fc-67ea4f81d0a7
Elliott, Joanne M.
68967f54-82e0-4d8e-bc09-dc4522d18b2c
Kuleshova, Jekaterina
95594d04-c0e8-4a1f-b5cf-b3f90b314dd6
Birkin, Peter R.
ba466560-f27c-418d-89fc-67ea4f81d0a7
Elliott, Joanne M.
68967f54-82e0-4d8e-bc09-dc4522d18b2c

Kuleshova, Jekaterina, Birkin, Peter R. and Elliott, Joanne M. (2008) An HMV mapping study of a pulsating jet system. Journal of Electroanalytical Chemistry, 617 (2), 185-193. (doi:10.1016/j.jelechem.2008.02.017).

Record type: Article

Abstract

A new system for the generation of hydrodynamic modulated voltammetry (HMV) is presented. This system consists of an oscillating jet produced through the mechanical vibration of a large diaphragm. The structure of the cell is such that a relatively small vibration is transferred to a large fluid flow at the jet outlet. Positioning of an electrode (Pt, 0.5 mm or 25 ?m diameter) over the exit of this jet enables the detection of the modulated flow of liquid. While this flow creates modest mass transfer rates (time averaged 0.015 cm s?1) it can also be used to create a HMV system where a ‘lock-in’ approach is adopted to investigate the redox chemistry in question. This is demonstrated for the redox system. Here ‘lock-in’ to the modulated hydrodynamic signal is achieved through the deployment of bespoke software. The apparatus and procedure is shown to produce a simple and efficient way to obtain the desired signal. In addition the spatial variation of the HMV signal, phase correction and time averaged current with respect to the jet orifice is presented.

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Published date: 15 June 2008
Keywords: hydrodynamic modulation, jet, electrochemistry, microelectrode, mapping

Identifiers

Local EPrints ID: 148651
URI: http://eprints.soton.ac.uk/id/eprint/148651
ISSN: 1572-6657
PURE UUID: cc2820c4-58ae-497e-a147-43e4507c03bf
ORCID for Peter R. Birkin: ORCID iD orcid.org/0000-0002-6656-4074

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Date deposited: 29 Apr 2010 13:19
Last modified: 29 Oct 2019 02:06

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