Enhanced mass transport to a reticulated vitreous carbon rotating cylinder electrode using jet flow


Reade, G.W., Ponce de Leon Albarran, C.A. and Walsh, F.C. Rolls Royce plc, P.O. Box 31, Derby DE24 8BJ, UK. (2006) Enhanced mass transport to a reticulated vitreous carbon rotating cylinder electrode using jet flow Electrochimica Acta, 51, (13), pp. 2728-2736. (doi:10.1016/j.electacta.2005.08.009).

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Description/Abstract

The mass transport characteristics of a porous, rotating cylinder electrode (RCE, 1.0 cm diameter; 0.5, 0.9 or 1.2 cm long; 1.25, 2.25, 3.00 cm3 overall volume; 250–2000 rpm speed) fabricated from reticulated vitreous carbon (RVC, 60 ppi or 100 ppi) were investigated. The deposition of copper from an acid sulfate electrolyte (typically, deoxygenated 1mM CuSO4 in pH 2, 0.5M Na2SO4 at 298 K) was used as a test reaction. The effect of a jet flow of electrolyte towards the electrode and the introduction of polypropylene baffles in the electrochemical cell were studied at controlled rotation rates of the RCE. The product of mass transport coefficient and volumetric electrode area (kmAe) is related to the rotation speed of the electrode. For the 60 ppi RVC RCE, the jet electrolyte flow (3.5 cm3 s?1) enhanced the mass transport rates by a factor of 1.46 at low rotation speeds; this factor was reduced to 1.08 at high rotation speeds. For a 100 ppi electrode, the enhanced mass transport decreased from 1.26 to 1.03 at low and high rotation rates, respectively. Under the experimental conditions, baffles showed little effect on the mass transport rates to the RVC RCE. Mass transport to jet flow at an RVC RCE is compared to other RCEs using dimensionless group correlation.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/j.electacta.2005.08.009
ISSNs: 0013-4686 (print)
Keywords: baffles, copper deposition, jet flow, mass transport, porous electrodes, reticulated vitreous carbon, rotating cylinder electrode
Subjects:

Organisations: Engineering Mats & Surface Engineerg Gp
ePrint ID: 27840
Date :
Date Event
24 May 2005Submitted
5 March 2006Published
Date Deposited: 27 Jun 2006
Last Modified: 16 Apr 2017 22:29
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/27840

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