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CGO20–CuO composites synthesized by the combustion method and characterized by H2-TPR
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 35:65mol/mol%) composites by urea combustion synthesis yielding to fine reactive powders at low temperatures were prepared. The re...
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Published in: | Ceramics international 2015-11, Vol.41 (9), p.10904-10909 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | 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 35:65mol/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. |
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ISSN: | 0272-8842 1873-3956 |
DOI: | 10.1016/j.ceramint.2015.05.032 |