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In the present work, we investigate the anodization of Nb in a K₂HPO₄ containing glycerol electrolyte at elevated temperatures ( 180∘C ). Under optimized conditions, uniformly over the entire anodized surface, self-organized porous Nb₂O₅ structures can be formed. The growth rate of highly ordered Nb₂O₅ is 1.7μm/min at beginning stage of anodization and the overall current efficiency is 70 %.
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Kiyoung Lee (2016) studied this question.
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