Electrochemical Doping of Compact TiO2 Thin Layers

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• 作者：Marketa Zukalova ; Milan Bousa ; Zdenek Bastl ; Ivan Jirka ; Ladislav Kavan
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：November 13, 2014
• 年：2014
• 卷：118
• 期：45
• 页码：25970-25977
• 全文大小：416K
• ISSN：1932-7455

文摘

Electrochemical n-doping of dense thin films of TiO₂ (anatase) occurs upon proton insertion from acidic aqueous electrolyte solution. Details of the reaction are investigated by cyclic voltammetry and by electrochemical impedance spectroscopy. The good-quality films are ideally compact, mimicking the properties of a macroscopic single-crystal electrode. The n-doping is stable for at least weeks of electrode storage in air at room temperature. Doping manifests itself by characteristic morphological differences of the surface. Electrochemical Li⁺ insertion indicates that there is a competition between Li⁺ and H⁺ ions in the lattice, detectable by cyclic voltammetry.