Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
194967 | Electrochimica Acta | 2006 | 6 Pages |
Abstract
Ordered porous niobium oxide with the diameter of less than 10 nm and the aspect ratio of more than 20 is prepared by anodization of niobium foils at 2.5 V in the mixture of 1 wt% HF and 1 M H3PO4 for 1 h. In this study, the effects of the mixed electrolytes, anodic potential and anodization time on the preparation of porous niobium oxide are described based on the current–time transients during anodization and morphological observations. It is founded that a single HF electrolyte leads to the formation of pores as well as the fast dissolution of formed pores at the surface. The dissolution of the formed oxide is significantly retarded by the addition of appropriate amount of H3PO4.
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Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Jinsub Choi, Jae Hoon Lim, Sang Cheon Lee, Jeong Ho Chang, Kyung Ja Kim, Min Ae Cho,