Spectral hemispherical reflectivity of nonstoichiometric cerium dioxide
| Autor: | Aldo Steinfeld, Simon Ackermann |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Thermogravimetric analysis
Materials science Analytical chemistry chemistry.chemical_element 02 engineering and technology Reflectivity 010402 general chemistry Nonstoichiometry 7. Clean energy 01 natural sciences Ceria Optics Thermal Solar radiation Radiative transfer Spectroscopy Porosity Renewable Energy Sustainability and the Environment business.industry Partial pressure 021001 nanoscience & nanotechnology Solar energy 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Cerium chemistry 13. Climate action 0210 nano-technology business |
| Zdroj: | Solar Energy Materials and Solar Cells, 159 |
| ISSN: | 0927-0248 |
| Popis: | Nonstoichiometric ceria, CeO2-δ, has emerged as a promising redox material for thermochemically splitting H2O and CO2 using concentrated solar energy. Knowledge of its radiative properties is crucial for the design of efficient solar reactors. Samples of various nonstoichiometries (0≤δ≤0.0377) were prepared by thermal reduction in a thermogravimetric analyzer at high temperatures (T≥1473 K) and under low oxygen partial pressures (pO2≤2.5·10−4 atm). The spectral hemispherical reflectivity was measured using a spectroscopic goniometry system in the spectral range 300–2800 nm. A porous ceria sample with interconnected µm-sized pores showed comparable selectivity because of its high optical thickness. The total hemispherical reflectivity was computed for emission temperatures in the range 900–6000 K relevant to solar reactors. ISSN:0927-0248 ISSN:1879-3398 |
| Databáze: | OpenAIRE |
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