Tri-doped ceria (M0.2Ce0.8O2-δ, M= Sm0.1, Ca0.05, Gd0.05) electrolyte for hydrogen and ethanol-based fuel cells
| Autor: | Ghazanfar Abbas, Asia Rafique, Muhammad Ashfaq Ahmad, Peter Lund, Imran Hanif, Muhammad Asghar, Amjad Ali, Muhammad Akbar, Rizwan Raza, Muhammad Kaleem Ullah |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Hydrogen Mechanical Engineering Doping Metals and Alloys Analytical chemistry chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Samarium Cerium symbols.namesake chemistry Mechanics of Materials Materials Chemistry symbols Cubic zirconia 0210 nano-technology Raman spectroscopy Yttria-stabilized zirconia |
| Zdroj: | Journal of Alloys and Compounds. 773:548-554 |
| ISSN: | 0925-8388 |
| Popis: | In recent scientific research, an interest has been gained significantly by rare earth metals such as cerium (Ce), samarium (Sm) and gadolinium (Gd) due to their use in fuel cells as electrolyte and catalysts. When used in an electrolyte, these materials lower the fuel cell's operating temperature compared to a conventional electrolyte, for example, yittria-stabilized zirconia (YSZ) which operates at a high temperature (≥800 °C). In this paper, the tri-doped ceria, M0.2Ce0.8O2-δ(M = Sm0.1Ca0.05Gd0.05) electrolyte powders was synthesized using the co-precipitation method at 80 °C. These dopants were used for CeO2with a total molar ratio of 1 M. Dry-pressed powder technique was used to make fuel cell pellets from the powder and placed them in the furnace to sinter at 700 °C for 60 min. Electrical conductivity of such a pellet in air was 1.2 × 10−2S cm−1at 700 °C measured by the ProboStat-NorECs setup. The crystal structure was determined with the help of X-ray diffraction (XRD), which showed that all the dopants were successfully doped in CeO2. Raman spectroscopy and UV-VIS spectroscopy were also carried out to analyse the molecular vibrations and absorbance, respectively. The maximum open-circuit voltages (OCVs) for hydrogen and ethanol fuelled at 550 °C were observed to be 0.89 V and 0.71 V with power densities 314 mW cm−2and 52.8 mW cm−2, respectively. |
| Databáze: | OpenAIRE |
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