高等学校化学学报

高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (7): 946.

• 论文 • 上一篇    下一篇

阳极氧化膜WO3(Ⅰ)--电显色和自褪色

林仲华, 陈坤尧, 郑智珍, 陈海漪   

  1. 厦门大学化学系、物理化学研究所, 厦门, 361005
  • 收稿日期:1990-03-20 出版日期:1991-07-24 发布日期:1991-07-24
  • 通讯作者: 林仲华
  • 基金资助:

    国家自然科学基金

WO3Anodic Oxide Film(Ⅰ)--Electrochromic and Auto-bleatching Processes

Lin Zhong-hua, Chen Kun-yao, Zheng Zhi-zhen, Chen Hai-yi   

  1. Department of Chemistry and Institute of Physical Chemistry, Xiamen University, Xiamen, 361005
  • Received:1990-03-20 Online:1991-07-24 Published:1991-07-24

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摘要： 用循环伏安法、交流阻抗技术和光电流谱技术研究了阳极氧化膜WO3电显色和自褪色过程的机理,电显色时,氢原子先在WO3表面吸附,其后从WO3表面向晶格内部传输,电褪色时,HxWO3晶格中填隙H原子先传输到W表面脱附生成填隙H+,然后再在电场驱动下在膜中迁移,自褪色过程可能是由膜中所含的少量水和部分填隙H原子的羟基化作用引起的。

关键词: 电显色, 三氧化钨膜, 钨电极, 阳极氧化膜

Abstract: The electrochromic and auto-bleatching processes at the WO3anodic oxide film in 0. 5 mol/L H2SO4solution were studied by cyclic voltammetry, A. C. impedance technique and photocur-rent spectrbscopy. The coloration mechanism consists of hydrogen adsorption on the WO3film surface and the transport of Hatoms in the WO3lattice. The bleatching process involves at least. transport of interstitial Hatoms and hydrogen desdrption at the WOS film surface, resulting in interstitial H+ions; then extration of H+droven by the external electric field. The auto-bleatching is arised from hydroxy-lation due to both partial interstitial Hatoms and the trace amount of water contained in the film.

Key words: Electrochromism, Tungsten trioxide film, Tungsten electrode, Anodic oxidation film

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