کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1460058 | 989600 | 2015 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: CGO20–CuO composites synthesized by the combustion method and characterized by H2-TPR CGO20–CuO composites synthesized by the combustion method and characterized by H2-TPR](/preview/png/1460058.png)
CGO–CuO composites are promising anode materials for low and intermediate temperature solid oxide fuel cells (LT/IT-SOFCs). In this work, several CGO–CuO (65:35; 50:50 y 35:65 mol/mol%) composites by urea combustion synthesis yielding to fine reactive powders at low temperatures were prepared. The resulting powder composites were characterized using X-ray diffraction (XRD), N2 adsorption–desorption (BET) and scanning electron microscopy-energy disperse X-ray (SEM-EDS). Additionally, hydrogen temperature programmed reduction (H2-TPR) tests were carried out, in order to elucidate reducibility of the powders. H2-TPR tests exhibited two primary reduction peaks, which correspond to the following stages: the first one (150–350 °C) can be ascribed to the reduction of CuO species into metallic Cu; while the second one (750–900 °C) can be ascribed to the bulk Ce4+→ Ce3+ reduction process of the support (CGO). Further, after H2-TPR reduction of the as-prepared CGO–CuO compositions, powders exhibit the presence of metallic Cu and the fluorite CGO solid solution that remains stable whereas any CuO is no longer noticed.
Journal: Ceramics International - Volume 41, Issue 9, Part A, November 2015, Pages 10904–10909