Electrochromism of electrochemically codeposited composites of phosphomolybdic acid and tungsten trioxide

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1837107· OSTI ID:404635

Pan, B H; Lee, J Y ^[1]

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1. National Univ. of Singapore (Singapore). Dept. of Chemical Engineering

The electrochromism of phosphomolybdic acid (PM) in solution and in a series of solid WO{sub 3}-PM composites is investigated. PM in solution changes color from light yellow to dark blue upon reduction whereas the composites show a change from light yellow to bluish brown under identical conditions. PM could not be deposited as a thin film by itself, and electrochemical codeposition was used to incorporate it into the WO{sub 3} matrix. The basic electrochromatic properties of WO{sub 3} are changed upon the incorporation of PM even in small quantities. The composites have a more intense color, a different cold spectrum, and a slower electrochromic response speed than that of WO{sub 3}. The composites, like WO{sub 3}, are also degraded by slow and continuous potential cycling.

• Sponsoring Organization: USDOE
• OSTI ID: 404635
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 9 Vol. 143; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
ELECTROCHROMISM
ELECTRODEPOSITION
MOLYBDOPHOSPHORIC ACID
THIN FILMS
TUNGSTEN OXIDES