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Electrochemical redox processes involving soluble cerium species

Electrochemical redox processes involving soluble cerium species
Electrochemical redox processes involving soluble cerium species
Anodic oxidation of cerous ions and cathodic reduction of ceric ions, in aqueous acidic solutions, play an important role in electrochemical processes at laboratory and industrial scale. Ceric ions, which have been used for oxidation of organic wastes and off-gases in environmental treatment, are a well established oxidant for indirect organic synthesis and specialised cleaning processes, including oxide film removal from tanks and process pipework in nuclear decontamination. They also provide a classical reagent for chemical analysis in the laboratory. The reversible oxidation of cerous ions is an important reaction in the positive compartment of various redox flow batteries during charge and discharge cycling. A knowledge of the thermodynamics and kinetics of the redox reaction is critical to an understanding of the role of cerium redox species in these applications. Suitable choices of electrode material (metal or ceramic; coated or uncoated), geometry/structure (2-or 3-dimensional) and electrolyte flow conditions (hence an acceptable mass transport rate) are critical to achieving effective electrocatalysis, a high performance and a long lifetime. This review considers the electrochemistry of soluble cerium species and their diverse uses in electrochemical technology, especially for redox flow batteries and mediated electrochemical oxidation.
cerium, electrochemical engineering, filter press reactor, mediated electrochemical oxidation, redox flow battery
0013-4686
226-247
Arenas, L.F.
6e7e3d10-2aab-4fc3-a6d4-63a6614d0403
Ponce De Leon, C.
508a312e-75ff-4bcb-9151-dacc424d755c
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
Arenas, L.F.
6e7e3d10-2aab-4fc3-a6d4-63a6614d0403
Ponce De Leon, C.
508a312e-75ff-4bcb-9151-dacc424d755c
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2

Arenas, L.F., Ponce De Leon, C. and Walsh, F.C. (2016) Electrochemical redox processes involving soluble cerium species. Electrochimica Acta, 205, 226-247. (doi:10.1016/j.electacta.2016.04.062).

Record type: Review

Abstract

Anodic oxidation of cerous ions and cathodic reduction of ceric ions, in aqueous acidic solutions, play an important role in electrochemical processes at laboratory and industrial scale. Ceric ions, which have been used for oxidation of organic wastes and off-gases in environmental treatment, are a well established oxidant for indirect organic synthesis and specialised cleaning processes, including oxide film removal from tanks and process pipework in nuclear decontamination. They also provide a classical reagent for chemical analysis in the laboratory. The reversible oxidation of cerous ions is an important reaction in the positive compartment of various redox flow batteries during charge and discharge cycling. A knowledge of the thermodynamics and kinetics of the redox reaction is critical to an understanding of the role of cerium redox species in these applications. Suitable choices of electrode material (metal or ceramic; coated or uncoated), geometry/structure (2-or 3-dimensional) and electrolyte flow conditions (hence an acceptable mass transport rate) are critical to achieving effective electrocatalysis, a high performance and a long lifetime. This review considers the electrochemistry of soluble cerium species and their diverse uses in electrochemical technology, especially for redox flow batteries and mediated electrochemical oxidation.

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More information

Accepted/In Press date: 12 April 2016
e-pub ahead of print date: 7 May 2016
Published date: 1 July 2016
Keywords: cerium, electrochemical engineering, filter press reactor, mediated electrochemical oxidation, redox flow battery
Organisations: Energy Technology Group

Identifiers

Local EPrints ID: 393200
URI: http://eprints.soton.ac.uk/id/eprint/393200
ISSN: 0013-4686
PURE UUID: 431ff665-eac8-4fe1-8be3-46b9268ceb0c
ORCID for C. Ponce De Leon: ORCID iD orcid.org/0000-0002-1907-5913

Catalogue record

Date deposited: 22 Apr 2016 11:06
Last modified: 17 Dec 2019 06:51

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