کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7720473 | 1497501 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
New SrMo1âxCrxO3âδ perovskites as anodes in solid-oxide fuel cells
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: New SrMo1âxCrxO3âδ perovskites as anodes in solid-oxide fuel cells New SrMo1âxCrxO3âδ perovskites as anodes in solid-oxide fuel cells](/preview/png/7720473.png)
چکیده انگلیسی
Oxides of composition SrMo1âxCrxO3âδ (x = 0.1, 0.2) have been prepared, characterized and tested as anode materials in single solid-oxide fuel cells, yielding output powers higher than 700 mW cmâ2 at 850 °C with pure H2 as a fuel. All the materials are suggested to present mixed ionic-electronic conductivity (MIEC) from neutron powder diffraction (NPD) experiments, complemented with transport measurements; the presence of a Mo4+/Mo5+ mixed valence at room temperature, combined with a huge metal-like electronic conductivity, as high as 340 S cmâ1 at T = 50 °C for x = 0.1, could make these oxides good materials for solid-oxide fuel cells. The magnitude of the electronic conductivity decreases with increasing Cr-doping content. The reversibility of the reduction-oxidation between the oxidized Sr(Mo,Cr)O4âδ scheelite and the reduced Sr(Mo,Cr)O3 perovskite phases was studied by thermogravimetric analysis, which exhibit the required cyclability for fuel cells. An adequate thermal expansion coefficient, without abrupt changes, and a chemical compatibility with electrolytes make these oxides good candidates for anodes in intermediate-temperature SOFC (IT-SOFCs).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 8, 6 March 2014, Pages 4067-4073
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 8, 6 March 2014, Pages 4067-4073
نویسندگان
R. MartÃnez-Coronado, J.A. Alonso, A. Aguadero, M.T. Fernández-DÃaz,