کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
198310 | 459951 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The gasochromic colouration of sputtered WO3 films with a low water content
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Sputtered WO3 films were coated with platinum and coloured by exposure to diluted hydrogen gas. Films with a high water content show a fast exponential increase of the optical density with time, whereas films with a low water content show a square root dependence, which is typical for slow diffusion.The combination of several experiments led us to a mechanism for the diffusion: the WO3 layer consists of columns with surfaces, which are covered by water. The hydrogen gas is dissociated by the Pt, and reacts with the water to form H3O+ and electrons, which reduce the WO3. The protons diffuse via the formation of H3O+ along the water on the interior WO3 surface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 46, Issues 13–14, 2 April 2001, Pages 2001–2005
Journal: Electrochimica Acta - Volume 46, Issues 13–14, 2 April 2001, Pages 2001–2005
نویسندگان
A. Georg, W. Graf, V. Wittwer,