Abstract
A-site-substituted cerium orthovanadates, Ce1−x Ca x VO4, were synthesised by solid-state reactions. At room temperature, the solid solution limit in Ce1−x Ca x VO4 series is at x = 0.4125. The crystal structure was analysed by X-ray diffraction and it exhibits a tetragonal zircon structure of space group I41/amd with a = 7.4004 (1) and c = 6.4983 (6) Å for CeVO4. The UV–Visible absorption spectra indicated that the compounds have band gaps at room temperature in the range of 4.2–4.5 eV. Conductivity measurements were performed for the first time up to the calcium solid solution limit in both air and dry 5% H2/Ar with conductivity values at 600 °C ranging from 0.3 to 20 mS cm−1 in air to 3 to 30 mS cm−1 in reducing atmosphere. In general, the conductivity of Ca-doped CeVO4 is higher in air but lower in a reducing atmosphere comparing to pure CeVO4. The H2/air electrochemical cell measurement indicates that the conduction of sample Ce0.7Ca0.3VO4 is electronic dominant. Samples Ce0.9Ca0.1VO4 and Ce0.8Ca0.2VO4 are redox stable at a temperature below 600 °C although the conductivity is not high enough to be used as an electrode for solid oxide fuel cells.
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References
Milligan WO, Vernon LW (1952) J Phys Chem 56:145
Carron MK, Mrose ME, Murata K (1958) J Am Miner 43:985
Fuess H, Kallel A (1972) J Solid State Chem 5:11
Rice CE, Robinson WR (1976) Acta Crystallogr B 32:2232
Chakoumakos BC, Abraham MM, Boatner LA (1994) J Solid State Chem 109:197
CrystalMaker®, A crystal and molecular structures program for Mac and Windows, 1994-2009, CrystalMaker Software Ltd, Oxford, England. www.crystalmaker.com
Stencel JM (1990) in Raman Spectroscopy for Catalysts. Van Nostrand Reinhold, New York
Mahapatra S, Vinu R, Saha D, Guru Row TN, Madras G (2009) Appl Catal A 361:32
Milligan WO, Watt LM, Rachford HH (1949) J Phys Colloid Chem 53:227
Rao IS, Palanna OG (1995) Bull Mater Sci 18:593
Varma S, Wani BN, Gupta NM (2002) Mater Res Bull 37:2117
Watanabe A (2000) J Solid State Chem 153:174
Hirata T, Watanabe A (2001) J Solid State Chem 158:264
Tsipis EV, Kharton VV, Frade JR (2005) J Eur Ceram Soc 25:2623
Tsipis EV, Kharton VV, Frade JR, Vyshatko NP, Shaula AL (2003) J Solid State Chem 176:47
Tsipis EV, Patrakeev MV, Kharton VV, Vyshatko NP, Frade JR (2002) J Mater Chem 12:3738
Varma S, Wani BN, Gupta NM (2003) Appl Catal A 241:341
Varma S, Wani BN, Sathyamoorthy A, Gupta NM (2004) J Phys Chem Solids 65:1291
Larson AC, Von Dreele RB (2004) General structure analysis system (GSAS). Los Alamos National Laboratory Report, LAUR, 86. Los Alamos National Laboratory, New Mexico
Shannon RD (1976) Acta Cryst A 32:751
Petit CTG, Lan R, Cowin PI, Tao SW (2010) J Solid State Chem 183:1231
Tsipis EV, Munnings CN, Kharton VV, Skinner SJ, Frade JR (2006) Solid State Ion 177:1015
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The authors thank EPSRC for funding and Ms Marian Millar for the powder XRD data collection.
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Petit, C.T.G., Lan, R., Cowin, P.I. et al. Structure, conductivity and redox stability of solid solution Ce1−x Ca x VO4 (0 ≤ x ≤ 0.4125). J Mater Sci 46, 316–326 (2011). https://doi.org/10.1007/s10853-010-4812-x
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DOI: https://doi.org/10.1007/s10853-010-4812-x