Preparation of Bi-Based Ternary Oxide Photoanodes BiVO4, Bi2WO6, and Bi2Mo3O12 Using Dendritic Bi Metal Electrodes
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- 作者：Donghyeon Kang ; Yiseul Park ; James C. Hill ; Kyoung-Shin Choi
- 刊名：The Journal of Physical Chemistry Letters
- 出版年：2014
- 出版时间：September 4, 2014
- 年：2014
- 卷：5
- 期：17
- 页码：2994-2999
- 全文大小：398K
- ISSN：1948-7185
文摘
The major limitation to investigating a variety of ternary oxides for use in solar energy conversion is the lack of synthesis methods to prepare them as high-quality electrodes. In this study, we demonstrate that Bi-based n-type ternary oxides, BiVO<sub>4sub>, Bi<sub>2sub>WO<sub>6sub>, and Bi<sub>2sub>Mo<sub>3sub>O<sub>12sub>, can be prepared as high-quality polycrystalline electrodes by mild chemical and thermal treatments of electrodeposited dendritic Bi films. The resulting oxide films have good coverage, adhesion, and electrical continuity, allowing for facile and accurate evaluation of these compounds for use in solar water oxidation. In particular, the BiVO<sub>4sub> electrode retained the porosity and nanocrystallinity of the original dendritic Bi film. This feature increased the electron鈥揾ole separation yield, making this compound more favorable for use as a photoanode in a photoelectrochemical cell.