Abstract
The synthesis, characterization, and evaluation of different weight loadings of cobalt ferrite (CoFe2O4) in 8 mol.% yttria-stabilized zirconia (8YSZ) via the co-precipitation method are reported. Prepared powders were calcined at 1350°C for 36 h and 1450°C for 4 h in air. These powders were then formed into a porous structure using sacrificial pore formation via oxidation of co-mixed graphite powder. These formed structures obtained were then characterized using thermogravimetric analysis (TGA), x-ray diffraction, high-temperature x-ray diffraction, scanning electron microscopy, and energy-dispersive x-ray spectroscopy. Brunauer–Emmett–Teller surface area analysis was performed on the most promising of the structures before being subjected to 50 thermal reduction-CO2 oxidation (redox) cycles using TGA. Together, these results indicate that CoFe2O4-8YSZ can provide a lower reduction temperature, maintain syngas production performance from cycle to cycle, and enhance utilization of the reactive material within the inert support in comparison to iron oxide only structures.
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Acknowledgements
This work was supported by the U.S. Department of Energy under Award No. DE-AR0000184 and partially supported by the National Institute for Nano Engineering program at Sandia National Laboratories. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000. We thank Mark A. Rodriguez (Sandia National Laboratories) for help with HT-XRD data collection and analysis.
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Allen, K.M., Coker, E.N., Auyeung, N. et al. Cobalt Ferrite in YSZ for Use as Reactive Material in Solar Thermochemical Water and Carbon Dioxide Splitting, Part I: Material Characterization. JOM 65, 1670–1681 (2013). https://doi.org/10.1007/s11837-013-0704-2
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DOI: https://doi.org/10.1007/s11837-013-0704-2