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Photoelectrochemical studies of oxide film of PbOn+SnOn obtained by potentiodynamic anodisation of Pb+Sn alloy electrode in alkaline medium

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Title Photoelectrochemical studies of oxide film of PbOn+SnOn obtained by potentiodynamic anodisation of Pb+Sn alloy electrode in alkaline medium
 
Creator MUKHOPADHYAY, I
SHARON, M
VELUCHAMY, P
MINOURA, H
 
Subject anodic-oxidation
lead anode
pbo
mechanism
acid
pbon + snon oxide films
photoelectrochemistry
potentiodynamics
 
Description Thin film semiconducting oxides are synthesised by potentiodynamic anodisation of Pb + Sn alloy electrodes of various Sn content in hot alkaline sodium sulfate solution. The effect of Sn on the photoelectrochemical behaviour in Fe(CN)(6)(4-/3-) (pH 9.2, buffer) of lead oxide thin film prepared by this method is investigated. It has been concluded that the incorporation of tin into Pb + Sn alloy and its subsequent anodisation decreases the growth of photoactive alpha-PbO (tetragonal) phase and introduces a relatively very low photoactive SnO phase. The oxide layer formed after 20 min of anodisation of Pb-0.1wt.%Sn electrode shows the best photoresponse (conversion efficiency 0.23%), but it is lower than that obtained with undoped lead oxide (0.86%). The reasons for obtaining a low efficiency are discussed. The oxide layer is characterised by various physical and photoelectrochemical techniques. The growth of oxide film is found to be maximal in the potential range -1.25 to +2.35 V(vs. SCE).
 
Publisher ELSEVIER SCIENCE SA LAUSANNE
 
Date 2011-07-29T11:20:28Z
2011-12-26T12:48:40Z
2011-12-27T05:49:32Z
2011-07-29T11:20:28Z
2011-12-26T12:48:40Z
2011-12-27T05:49:32Z
1996
 
Type Article
 
Identifier JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 401(1-2), 139-146
0022-0728
http://dx.doi.org/10.1016/0022-0728(95)04345-4
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7692
http://hdl.handle.net/10054/7692
 
Language en