Hydrodynamic voltammetry in microreactors: multiphase flow

K Yunus, C B Marks, A C Fisher, D W E Allsopp, T J Ryan, R A W Dryfe, S S Hill, E P L Roberts, C M Brennan

Research output: Contribution to journalArticlepeer-review

30 Citations (SciVal)


A new hydrodynamic microelectrochemical reactor design is presented for the voltammetric sensing of chemical species contained within two immiscible liquid streams flowing within rectangular ducts, in direct contact. This article describes the design, fabrication and experimental characterisation of the device. A microfabricated rectangular duct (of typical dimensions: height 75 mum, width 500 mum and length 3 cm) was constructed using FOTURAN glass and standard photolithographic procedures. Microelectrode sensors were positioned on one internal duct wall with a geometry to permit separate voltammetric monitoring of the two solvent phases. Reagent solutions containing N,N,N',N'-tetramethyl-1,4-phenylene diamine in 1,2-dichloroethane and hexaamineruthenium(III)chloride in water were pumped through the device under laminar flow conditions. Linear sweep voltammetric measurements were performed separately on the two electrolyte streams and the variation of the transport limited current as a function of volume flow rate through the cell monitored. Under conditions where stable flow was obtained the current flow rate relationship was observed to follow analogous voltammetric behaviour to that observed in macroscopic flow cell devices. (C) 2002 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)579-583
Number of pages5
JournalElectrochemistry Communications
Issue number7
Publication statusPublished - 2002

Bibliographical note

ID number: ISI:000177019700010


Dive into the research topics of 'Hydrodynamic voltammetry in microreactors: multiphase flow'. Together they form a unique fingerprint.

Cite this