M. , J. C. Núnez, and P. , Synthesis and characterisation of BaCeO 3 -based proton conductors obtained from freeze-dried precursors, Journal of the European Ceramic Society, vol.29, pp.131-138, 2009.

A. , V. S. Sundaresan, R. Cahn, and R. W. , Powder metallurgy

H. P. Kramer and E. J. , Materals science and technology: a comprehensive treatment, pp.138-191, 1991.

S. , M. Thorel, A. Nanni, and P. , Synthesis of Y-doped BaCeO 3 nanopowders by a modified solid-state process and conductivity of dense fine-grained ceramics, Solid State Ionics, vol.180, pp.168-174, 2009.
URL : https://hal.archives-ouvertes.fr/hal-00367989

B. , F. Knop, and O. Pyrochlores, II. An investigation of La 2 Ce 2 O 7 by neutron diffraction, Can. J. Chem, vol.45, p.609, 1967.

C. , G. Paoletti, A. Ricci, and F. P. , Choice of collimators for a crystal spectrometer for neutron diffraction, Nuclear Instruments, pp.223-228, 1958.

C. , S. H. Wang, and H. M. , Carbon monoxide yield in natural gas autothermal reforming process, Journal of Power Sources. n, vol.101, pp.188-195, 2001.

C. L. Sasirekha-n, R. B. , and C. Y. , CO oxidation on ceria-and manganese oxide-supported gold catalysts, Separation and Purification Technology, pp.211-218, 2007.

C. Y. Pena-m and . L. Yeung-k, hydrogen production from oxidation of methane in a membrane reactor, Journal of the Taiwan Institute of Chemical Engineers, vol.40, pp.281-288, 2009.

C. , T. V. Banerjee, S. Choudhary, and V. , Review Catalysts for combustion of methane and lower alkanes, Applied Catalysis A, vol.234, p.123, 2002.

D. P. , K. S. Teraoka-y, C. P. , R. S. , and N. Labhsetwar, CoO 3 perovskite type catalysts for the control of CO and PM emissions, Catalysis Communications, vol.11, pp.665-669, 2010.

D. , P. N. Richards, R. E. Russek, S. L. Taulord, and D. M. , Ion transport membrane technology for oxygen separation and syngas production, Solid State Ionics, vol.134, pp.21-23, 2000.

F. D. Shaula-a and F. J. Kharton-v, High oxygen permeability in fluorite-type Ce 0.8 Pr 0.2 O 2? via the use of sintering aids, Journal of Membrane Science, vol.299, pp.1-7, 2007.

F. , M. Bjorgum, E. Viig, T. Rokstad, and O. A. , Partial oxidation of methane to synthesis gas: elimination of gas phase oxygen, Catalysis Today. n, vol.63, pp.489-497, 2000.

G. , R. M. German, and R. M. , Liquid Phase Sintering, pp.160-163, 1985.

J. R. Snyder-l, Introduction to X-ray powder diffractometry

K. , T. H. Yu, J. H. Lee, and J. S. , The mechanism of hydrogen reduction synthesis of nanocomposite W-Cu powders, NanoStructured Materials, v, issue.9, pp.213-216, 1997.

K. , M. Krause, T. Kopasz, J. Carter, D. Ahmed et al., Catalytic Autothermal Reforming of Hydrocarbon Fuels for Fuel Cells, In: Spring National Meeting. American Institute of Chemical Engineering, 2002.

L. , W. E. Reinforth, W. M. Lee, W. E. Reinforth, and W. M. London, Ceramic microstructures property control by processing, pp.3-65

L. , J. A. Bitter, J. H. Steghuis, A. G. Van-ommen, J. G. Seshan et al., Methane Utilization via Synthesis Gas Generation -Catalytic Chemistry and Technology. Environmental Catalysis. Catalytic Science Series, 1999.

L. Liu, . Xu, F. Qiang, W. Wang, and H. Zhang, Thermophysical properties of complex rare-earth zirconate ceramic for thermal barrier coatings, J. Am

L. , J. Sanchez, C. Henry, M. Doeuff, and S. , The chemistry of the sol-gel process, Solid State Ionics, pp.32-33, 1989.

O. M. , B. A. Kiennemann-a, and . Barama-a, Preparation and catalytic activity of nickelemanganese oxide catalysts in the reaction of partial oxidation of methane, Comptes Rendus Chimie, vol.12, pp.740-747, 2009.

P. , C. Cremer, P. Peters, R. Stolten, and D. , Small-scale testing of a precious metal catalyst in the autothermal reforming of various hydrocarbon feeds, Journal of Power Sources. n, vol.106, pp.231-237, 2002.

P. , H. Rout, S. K. Pratihar, and S. K. Bhattacharya-s, Effect of process parameters on combined EDTA?citrate synthesis of, Powder Technology, vol.209, pp.98-104, 2011.

C. , P. S. Nielsen, C. S. Madsen, and S. E. Nielsen-j, Technologies for large-scale gas conversion, Applied Catalysis a: General, vol.221, pp.379-387, 2001.

M. J. Gririboval-constant and . Leclercq-g, Structural features and performance of LaNi 1_x Rh x O 3 system for the dry reforming of methane, Applied Catalysis A: General, vol.344, pp.10-19, 2008.

S. , A. G. Dos, F. , F. A. Sousa, J. F. De et al., Síntesis y refinado por el método Rietveld de la fase perovsquita obtenida a partir del método de co-precipitación vía oxalato, Información Tecnológica, vol.221, pp.17-28, 2011.

S. , B. Francois, P. Fritscher, K. Schulz, and U. , EB-PVD processing of pyrochlorestructured, La 2 Zr 2 O 7 -based TBCs, Surf. Coat. Technol, vol.182, p.175, 2004.

S. Z. , D. H. Xiong-g, C. Y. And, and Y. W. , Performance of a mixedconducting ceramic membrane reactor with high oxygen permeability for methane conversion, Journal of Membrane Science, vol.183, pp.2-3, 2002.

S. , X. Guo, and Z. , Technologies for direct production of flexible H2/CO synthesis gas, Energy conversion and management, pp.560-569, 2006.

T. Ishihara, Perovskite Oxide for Solid Oxide Fuel Cells, 2009.
DOI : 10.1007/978-0-387-77708-5

T. J. , Y. W. Cai-r, and L. L. Zhu-b, Novel and ideal zirconium-based dense membrane reactors for partial oxidation of methane to syngas, Catalysis Letters, vol.78, pp.129-137, 2002.

V. , R. Cao, X. Tietz, F. Basu, D. Stöver et al., Zirconates as new materials for thermal barrier coatings, J. Am. Ceram. Soc, vol.83, issue.8, p.2023, 2000.

W. , D. J. Simbeck, D. R. Karp, A. D. Dickerson, and R. L. , Syngas production for Gas-to Liquids Applications: Technologies, issues and outlook, Fuel processing Technology, vol.71, pp.139-148, 2001.

W. A. Kangvansura-p and A. S. Praserthdam-p, The effect of preparation: Pechini and Schiff base methods, on adsorbed oxygen of LaCoO3 perovskite oxidation catalysts, Colloids and Surfaces A: Physicochem

Y. , H. Nishino, H. Kakinuma, K. Nomura, and K. , Crystal phase and electrical conductivity in the pyrochlore-type composition systems, J. Ceram. Soc. Jpn, vol.111, pp.1300-902, 2003.

Y. , R. A. Sakthivel, A. Moss, T. S. Paiva-santos, and C. O. , DBWS-9411, an Upgrade of the DBWS ? Programs for Rietveld Refinement with PC and Mainframe Computers, Journal of Applied Crystallography, pp.28-366, 1995.

R. Aneflous, L. Gavarri, J. R. Musso, J. A. Benyaich, H. Benlhachemi et al., Elaboration and characterization of europium doped ceria solid solutions, Journal de Physique IV (Proceedings), vol.123, issue.123, pp.35-39, 2005.
DOI : 10.1051/jp4:2005123005

L. Aneflous, J. A. Musso, S. Villain, J. R. Gavarri, and H. Benyaich, Effects of temperature and Nd composition on non-linear transport properties in substituted Ce1???xNdxO2????? cerium dioxides, Journal of Solid State Chemistry, vol.177, issue.3, pp.856-865, 2004.
DOI : 10.1016/j.jssc.2003.09.020

F. Brisse and O. Knop, by neutron diffraction, Canadian Journal of Chemistry, vol.45, issue.6, p.609, 1967.
DOI : 10.1139/v67-101

X. Cao, R. Vassen, W. Fischer, F. Tietz, W. Jungen et al., Lanthanum?cerium oxide as a thermal barrier-coating material for high-temperature application, Adv. Mater, issue.17, pp.15-1438, 2003.

M. Chmielowska, S. Villain, A. Kopia, J. P. Dallas, J. Kusinski et al., Ce1???xNdxO2?????/Si thin films obtained by pulsed laser deposition: Microstructure and conduction properties, Thin Solid Films, vol.516, issue.12, pp.3747-3754, 2008.
DOI : 10.1016/j.tsf.2007.06.224

J. C. Gomes, C. Pereira-de-souza, U. U. Gomes, J. R. Gavarri, J. P. Dallas et al., Nanostructured cerium dioxide prepared from monazite?cerite mineral waste using sintering method and leaching process, Mat. Sci. Forum, pp.514-516, 2006.

L. Liu, . Xu, . Qiang, W. Fuchi, . Wang et al., Thermophysical properties of complex rare-earth zirconate ceramic for thermal barrier coatings, J. Am. Ceram. Soc, issue.7, pp.91-2398, 2008.

K. Ouzaouit, L. Bakiz, S. Villain, A. Benlhachemi, A. Essoumhi et al., Lanthanum hydroxycarbonates and langasite ceramics: stability, infrared spectroscopy and electrical behaviors, XVIII Physical Metallurgy and Materials Science Conference, 2007.

V. K. Pecharsky and P. Y. Zavalij, Fundamentals of Powder Diffraction and Structural Characterization of Materials, 2005.

J. Rodríguez-carvajal, FULLPROF program for Rietveld refinement and pattern matching analysis. Abstracts of the Satellite Meeting on Powder Diffraction of the XVq, p.127, 1990.

J. Rodriguez-carvajal, Systematic errors and structural complexity in the Rietveld method, IVth European Powder Diffraction Conference, p.2, 1995.

J. Rodríguez-carvajal, Recent developments of the program FULLPROF. Commission on Powder Diffraction (IUCr), Newsletter, vol.26, pp.12-19, 2001.

S. Saitzek, S. Villain, and J. R. Gavarri, Nanocrystalline CuO_x-CeO₂ Systems: FTIR Analyses of Catalytic Reactions, Materials Science Forum, vol.513, pp.1-14, 2006.
DOI : 10.4028/www.scientific.net/MSF.513.1

S. Saitzek, S. Villain, G. Nolibé, and J. R. Gavarri, Electrical behaviour of catalytic nanostructured CeO2/CuOx composites under air???methane gas impulses, Applied Surface Science, vol.253, issue.18, pp.7490-7496, 2007.
DOI : 10.1016/j.apsusc.2007.03.040

B. Saruhan, P. Francois, K. Fritscher, and U. Schulz, EB-PVD processing of pyrochlore-structured La2Zr2O7-based TBCs, Surface and Coatings Technology, vol.182, issue.2-3, p.175, 2004.
DOI : 10.1016/j.surfcoat.2003.08.068

R. Vassen, X. Cao, F. Tietz, D. Basu, and D. Stöver, Zirconates as New Materials for Thermal Barrier Coatings, Journal of the American Ceramic Society, vol.76, issue.77, pp.83-2023, 2000.
DOI : 10.1111/j.1151-2916.2000.tb01506.x

M. Wen, . Shengkae, . Gong, . Huibin, . Xu et al., On improving the phase stability and thermal expansion coefficients of lanthanum cerium oxide solid solutions, Scripta Mater. Scr. Mater, vol.54, issue.8, pp.1505-1508, 2006.

G. K. Williamson and W. H. Hall, X-ray line broadening from filed aluminium and wolfram, Acta Metallurgica, vol.1, issue.1, pp.22-31, 1953.
DOI : 10.1016/0001-6160(53)90006-6

H. Yamamura, H. Nishino, K. Kakinuma, K. Nomura, and Y. , Crystal phase and electrical conductivity in the pyrochlore-type composition systems, J. Ceram. Soc. Jpn, pp.111-1300, 2003.

A. G. Santos, F. A. Fontes, J. F. De-sousa, and C. P. De-souza, S??ntesis y Refinado por el M??todo Rietveld de la fase perovsquita obtenida a partir del M??todo de Co-precipitaci??n v??a Oxalato, Informaci??n tecnol??gica, vol.22, issue.1, pp.17-28, 2011.
DOI : 10.4067/S0718-07642011000100004

M. Zheng and B. Zhu, Proton conductivity in Yb-doped strontium cerates, Solid State Ionics, vol.80, issue.1-2, pp.59-65, 1995.
DOI : 10.1016/0167-2738(95)00129-T

Y. Ruiquiang, W. Qingfeng, C. Guihua, H. Weiya, and X. Kui, A stable BaCeO 3 based proton conductor for solid oxide fuel cells, Ionics, vol.15, p.749, 2009.

K. C. Goretta, E. T. Park, J. Guan, U. Balachandran, and S. E. Dorris, Diffusional creep of BaCe0.8Y0.2O3????? mixed conductors, Solid State Ionics, vol.111, issue.3-4, pp.295-299, 1998.
DOI : 10.1016/S0167-2738(98)00176-3

N. Bonanos, K. S. Knight, and B. Ellis, Perovskite solid electrolytes: Structure, transport properties and fuel cell applications, Solid State Ionics, vol.79, pp.161-170, 1995.
DOI : 10.1016/0167-2738(95)00056-C

G. Y. Meng, Q. L. Ma, R. R. Peng, and X. Q. Liu, Ceramic membrane fuel cells based on solid proton electrolytes, Solid State Ionics, vol.178, issue.7-10, pp.697-703, 2007.
DOI : 10.1016/j.ssi.2007.02.018

P. H. Chiang, D. Eng, and M. Stoukides, Electrocatalytic nonoxidative dimerization of methane over Ag electrodes, Solid State Ionics, vol.61, issue.1-3, pp.99-103, 1993.
DOI : 10.1016/0167-2738(93)90340-9

H. Kato, H. Kobayashi, and A. Kudo, (M:?? Ta and Nb) with the Perovskite Structure, The Journal of Physical Chemistry B, vol.106, issue.48, pp.12441-12447, 2002.
DOI : 10.1021/jp025974n

D. Shima and S. M. Haile, The influence of cation non-stoichiometry on the properties of undoped and gadolinia-doped barium cerate, Solid State Ionics, vol.97, issue.1-4, p.443, 1997.
DOI : 10.1016/S0167-2738(97)00029-5

K. Ouchetto, F. Archaimbault, A. Pineau, and J. Choisnet, Chemical and structural characterization of a new barium ceroplatinate: Ba2CePtO6 a double perovskite mixed oxide, Journal of Materials Science Letters, vol.75, issue.21, p.1277, 1991.
DOI : 10.1007/BF00720945

R. A. Young, The Rietveld Method. I.U.Cr, 1995.

P. Nowakowski, S. Villain, A. Kopia, I. Suliga, and J. Gavarri, Catalytic conversion of air???methane flow by nanostructured ruthenium dioxide: FTIR spectroscopy and modeling, Applied Surface Science, vol.254, issue.18, pp.5675-5682, 2008.
DOI : 10.1016/j.apsusc.2008.03.032

A. J. Wilson, International tables for crystallography: mathematical, physical and chemical tables, klerwer Academic Publishers, Dardrecht, pp.625-626, 1995.

Y. Nayak, R. P. Rana, S. K. Pratihar, and S. Bhattacharyya, Pressureless sintering of dense hydroxyapatite???zirconia composites, Journal of Materials Science: Materials in Medicine, vol.447, issue.6, pp.2437-2444, 2008.
DOI : 10.1007/s10856-008-3371-z

A. A. Sarkar, A. Chatterjee, P. Barat, and P. Mukherjee, Comparative study of the Portevin-Le Chatelier effect in interstitial and substitutional alloy, Materials Science and Engineering: A, vol.459, issue.1-2, p.361, 2007.
DOI : 10.1016/j.msea.2007.01.006

S. Saitzek, J. Blach, S. Villain, and J. R. Gavarri, Nanostructured ceria: a comparative study from X-ray diffraction, Raman spectroscopy and BET specific surface measurements, physica status solidi (a), vol.38, issue.559, p.1534, 2008.
DOI : 10.1002/pssa.200723419

Z. Li, R. Liu, J. Wang, Z. Xu, Y. Xie et al., and its application in the synthesis of ammonia at atmospheric pressure, Science and Technology of Advanced Materials, vol.11, issue.7-8, pp.566-570, 2007.
DOI : 10.1016/0167-2738(95)00127-R

H. L. Lin, R. K. Chiang, C. L. Kuo, and C. W. Chang, Synthesis of BaCeO3 powders by a fast aqueous citrate???nitrate process, Journal of Non-Crystalline Solids, vol.353, issue.11-12, pp.1188-1194, 2007.
DOI : 10.1016/j.jnoncrysol.2006.09.042

F. Genet, S. Loridant, C. Ritter, and G. Lucazeau, Phase transitions in BaCeO3: neutron diffraction and Raman studies, Journal of Physics and Chemistry of Solids, vol.60, issue.12, pp.2009-2021, 1999.
DOI : 10.1016/S0022-3697(99)00031-1

M. Ammann, U. Pöschl, and Y. Rudich, Effects of reversible adsorption and Langmuir???Hinshelwood surface reactions on gas uptake by atmospheric particles, Phys. Chem. Chem. Phys., vol.29, issue.2, pp.351-356, 2003.
DOI : 10.1039/B208708A

I. Baldyche, J. M. Vohsa, and R. J. Gortea, The effect of support on redox properties and methanol-oxidation activity of vanadia catalysts, Applied Catalysis A: General, vol.391, issue.1-2, pp.86-91, 2011.
DOI : 10.1016/j.apcata.2010.05.051