Anodic growth of titanium oxide: Electrochemical behaviour and morphological evolution

Anodic growth of titanium oxide: Electrochemical behaviour and morphological evolution

The mechanism of growth of anodic titanium oxide in sulphuric acid has been investigated by potentiostatic and potentiodynamic anodizing, electrochemical impedance spectroscopy and transmission electron microscopy. It was found that most of the charge passed during growth is consumed in oxygen evolu...

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Bibliographic Details
Published in:Electrochimica acta Vol. 75; pp. 288 - 295
Main Authors: Mazzarolo, A., Curioni, M., Vicenzo, A., Skeldon, P., Thompson, G.E.
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 30-07-2012
Elsevier
Subjects:
Amorphous to crystalline transition
Anodic
Anodizing
Bubbles
Chemistry
Crystal structure
Electrochemistry
Electronics
Evolution
Exact sciences and technology
General and physical chemistry
Oxides
Sulfuric acid
Titanium oxide
Titanium oxides
Titanium oxide
Anodizing
Amorphous to crystalline transition
Sulfuric acid
Growth
Amorphous state
Electrochemical characteristic
Crystalline state
Titanium Oxides
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Summary:The mechanism of growth of anodic titanium oxide in sulphuric acid has been investigated by potentiostatic and potentiodynamic anodizing, electrochemical impedance spectroscopy and transmission electron microscopy. It was found that most of the charge passed during growth is consumed in oxygen evolution at the oxide–solution interface and the measured current relates to the electronic conduction properties of the oxide. Further, it was confirmed that an amorphous to crystalline transition takes place during potentiodynamic growth, and the transition triggers the additional generation of oxygen bubbles that occurs within the oxide. Depending on the growth conditions, the oxygen bubbles can rupture with local re-growth of the film then occurring.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2012.04.114