Abstract
Undoped and doped ceria were synthesized by a solid state reaction and a polymerized—complex method. Microstructural and phase development of MxCe1-xO2-δ (M = Zr, Hf; 0 ≤ x ≤ 0.2) were examined using X-ray diffraction and scanning electron microscopy. Redox properties were investigated by thermogravimetric analysis and a remarkable increase of the oxygen storage capacity of ceria with increasing dopant concentration was demonstrated. ZrxCe1-xO2 and HfxCe1-xO2 solid solutions at x = 0.2 were shown to release double the amount of oxygen during reduction compared to undoped ceria. The solid state reaction synthesis produces materials with excellent redox performance up to 15 mol% dopant concentration and is otherwise equivalent with materials produced by Pechini synthesis.
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Acknowledgments
We gratefully acknowledge the financial support by the Swiss Competence Center Energy & Mobility (Proposal # 701) and the fruitful discussion with members of the COST Action CM1104 during the 3rd General Meeting in Barcelona, November 2014.
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Bonk, A., Maier, A.C., Burnat, D., Vogt, U.F., Züttel, A. (2016). Investigations on the Redox Performance of Pure and Doped CeO2 by Comparing Solid State Reaction and Pechini Synthesis. In: Udomkichdecha, W., Mononukul, A., Böllinghaus, T., Lexow, J. (eds) Materials for Energy Infrastructure. Springer, Singapore. https://doi.org/10.1007/978-981-287-724-6_2
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DOI: https://doi.org/10.1007/978-981-287-724-6_2
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