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The fabrication of lead dioxide layers on a titanium substrate

The fabrication of lead dioxide layers on a titanium substrate
The fabrication of lead dioxide layers on a titanium substrate
It is shown that stable and active lead dioxide on titanium anodes (including mesh electrodes) may be fabricated by appropriate pretreatment of the substrate and a strategy involving the anodic deposition of two PbO2 layers-a thick underlayer with the lead dioxide doped with fluoride and iron and a top layer with the lead dioxide doped with bismuth. Periods on open circuit, especially in solutions containing an oxidisable organic or inorganic species must, however, be avoided since all forms of PbO2 are reducible unless protected by an anodic current; the rates of the reduction does depend on the medium, the dopants in the PbO2 and the morphology of the layer. It is also shown that, as at gold substrates, the morphology of the PbO2 layer on titanium (consequently, their properties including adhesion and electrocatalytic activity) depend strongly on the deposition conditions including the bath composition (including Pb(II) concentration, acid concentration, concentration and choice of dopantion), temperature, current density and deposition charge.
lead dioxide coatings, stability as anodes oxygen-transfer reactions, physicochemical properties, film electrodes, pbo2-film electrodes, acidic-solutions, gold electrodes, pbo2 films, deposition, electrosynthesis, electrocatalysis
0013-4686
786-793
Mohd, Yusairie
078945e0-ffc2-4eb0-898e-4b00d9644db7
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Mohd, Yusairie
078945e0-ffc2-4eb0-898e-4b00d9644db7
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30

Mohd, Yusairie and Pletcher, Derek (2006) The fabrication of lead dioxide layers on a titanium substrate. Electrochimica Acta, 52 (3), 786-793. (doi:10.1016/j.electacta.2006.06.013).

Record type: Article

Abstract

It is shown that stable and active lead dioxide on titanium anodes (including mesh electrodes) may be fabricated by appropriate pretreatment of the substrate and a strategy involving the anodic deposition of two PbO2 layers-a thick underlayer with the lead dioxide doped with fluoride and iron and a top layer with the lead dioxide doped with bismuth. Periods on open circuit, especially in solutions containing an oxidisable organic or inorganic species must, however, be avoided since all forms of PbO2 are reducible unless protected by an anodic current; the rates of the reduction does depend on the medium, the dopants in the PbO2 and the morphology of the layer. It is also shown that, as at gold substrates, the morphology of the PbO2 layer on titanium (consequently, their properties including adhesion and electrocatalytic activity) depend strongly on the deposition conditions including the bath composition (including Pb(II) concentration, acid concentration, concentration and choice of dopantion), temperature, current density and deposition charge.

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More information

Published date: 2006
Keywords: lead dioxide coatings, stability as anodes oxygen-transfer reactions, physicochemical properties, film electrodes, pbo2-film electrodes, acidic-solutions, gold electrodes, pbo2 films, deposition, electrosynthesis, electrocatalysis

Identifiers

Local EPrints ID: 44502
URI: http://eprints.soton.ac.uk/id/eprint/44502
ISSN: 0013-4686
PURE UUID: ab8ac048-8ff4-4d27-9e5c-eea18098b06a

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Date deposited: 06 Mar 2007
Last modified: 13 Mar 2019 21:07

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