کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1291412 | 973358 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improved surface proton conduction of yttrium-stabilized zirconia via acidic modifications
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Improved surface proton conduction of yttrium-stabilized zirconia via acidic modifications Improved surface proton conduction of yttrium-stabilized zirconia via acidic modifications](/preview/png/1291412.png)
چکیده انگلیسی
This work studied the acidic surface modifications on the conduction properties of yttrium-stabilized zirconia (YSZ) nanocrystals using sulfuric and phosphoric acid protonation techniques with an aim to discover suitable additives of the proton-conducting membranes for intermediate temperature operation. All YSZ nanostructures were hydrothermally prepared and the sample surfaces were modified with sulfate or phosphate groups by subsequently immersing the as-prepared samples into sulfuric or phosphoric acid. The obtained samples were characterized by X-ray diffraction, high-resolution transmission electron microscope, element analysis, infrared spectra, N2 adsorption/desorption, and impedance spectroscopy. It was found that the samples exhibited a cubic fluorite structure with a grain size of 4.5Â nm and a high surface area of 205Â m2Â gâ1. Proton conduction measurements showed that sulfate-modified samples had an apparently low proton conductivity, while the phosphate-modified ones exhibited a significant proton conductivity and improved thermal stability. These observations were explained by taking into account the grafted species and the amount of hydrated water.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 179, Issue 1, 15 April 2008, Pages 101-105
Journal: Journal of Power Sources - Volume 179, Issue 1, 15 April 2008, Pages 101-105
نویسندگان
Hui Wang, Liping Li, Yong Yang, Guangshe Li,