Search results for "Electrochemical anodization"
showing 2 items of 2 documents
Influence of electrolyte temperature on the synthesis of iron oxide nanostructures by electrochemical anodization for water splitting
2018
[EN] Iron oxide nanostructures are an attractive option for being used as photocatalyst in photoelectrochemical applications such as water splitting for hydrogen production. Nanostructures can be obtained by different techniques, and electrochemical anodization is one of the simplest methods which allows high control of the obtained morphology by controlling its different operational parameters. In the present study, the influence of the electrolyte temperature during electrochemical anodization under stagnant and hydrodynamic conditions was evaluated. Temperature considerably affected the morphology of the obtained nanostructures and their photoelectrochemical behavior. Several techniques …
Observation of New Oscillatory Phenomena during the Electrochemical Anodization of Silicon
1999
This paper reports the observation of large undamped voltage oscillations during the anodic polarization of silicon in electrol yte containing a combination of acids. One of them stimulates oxide growth and the other its chemical dissolution (in the present c ase, (0.01-0.1 M H3PO4) + (0.001- 0.01 M HF). This temporal patterning of the anodization process is shown to be due to the formation of a thin (50-90 nm) oxide layer at the sample surface and its subsequent lifting-off. The mechanism of oxide detachment i s thought to be an isotropic growth of micropores at the oxide/silicon interface triggered on by changes of electrochemical condi tions there.