Serra Alfaro, JM.; Somacescu, S.; Escolástico Rozalén, S. (2015). Tailoring mixed ionic-electronic conduction in H-2 permeable membranes based on the system Nd5.5W1-xMoxO11.25-delta. Journal of Materials Chemistry A. 3(2):719-731. https://doi.org/10.1039/c4ta03699a
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/84691
Title:
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Tailoring mixed ionic-electronic conduction in H-2 permeable membranes based on the system Nd5.5W1-xMoxO11.25-delta
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Author:
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Serra Alfaro, José Manuel
Somacescu, Simona
Escolástico Rozalén, Sonia
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UPV Unit:
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Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química
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Issued date:
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Abstract:
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Lanthanide tungstates (Ln(6)WO(12)) are promising candidates for the development of ceramic hydrogen transport membranes since they exhibit mixed ionic (proton and oxygen ion transport) and electronic conductivity and ...[+]
Lanthanide tungstates (Ln(6)WO(12)) are promising candidates for the development of ceramic hydrogen transport membranes since they exhibit mixed ionic (proton and oxygen ion transport) and electronic conductivity and remarkable stability in a moist CO2 environment at high temperatures. This work presents the structural and electrochemical characterization of mixed conducting materials for the specific system Nd5.5W1-xMoxO11.25-delta (x = 0, 0.1, 0.5 and 1). Evolution of the crystalline structure is studied as a function of the sintering temperature. Shrinkage behavior is analyzed for all compositions in the temperature range from 1000 degrees C to 1500 degrees C and these compounds show high sintering activity even at relatively low temperatures. The total conductivity in different environments is studied systematically for samples sintered at 1350 degrees C. The H/D isotopic effect is also studied by DC-electrochemical measurements. H-2 permeation is investigated for the selected compound Nd5.5W0.5Mo0.5O11.25-delta in the range of 700-1000 degrees C achieving values of 0.3 mL min(-1) cm(-2) for a 0.9 mm thick disc membrane. Finally, the stability of this material under different CO2 and H2S-rich atmospheres at high temperatures is proven.
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Subjects:
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Proton coductor
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Hydrogen membrane
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Tungstate
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Copyrigths:
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Cerrado |
Source:
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Journal of Materials Chemistry A. (issn:
2050-7496
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DOI:
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10.1039/c4ta03699a
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Publisher:
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Royal Society of Chemistry
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Publisher version:
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http://dx.doi.org/10.1039/c4ta03699a
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Project ID:
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info:eu-repo/grantAgreement/CSIC//JAE-Pre 08-0058/
info:eu-repo/grantAgreement/MICINN//ENE2011-24761/ES/DESARROLLO DE NUEVOS DISPOSITIVOS IONICOS PARA LA PRODUCCION EFICIENTE Y SOSTENIBLE DE ENERGIA Y PRODUCTOS QUIMICOS%2FCOMBUSTIBLES/
info:eu-repo/grantAgreement/MICINN//CSD2009-00050/ES/Desarrollo de catalizadores más eficientes para el diseño de procesos químicos sostenibles y produccion limpia de energia/
info:eu-repo/grantAgreement/MINECO//SEV-2012-0267/
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Thanks:
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Financial support by the Spanish Government (Grants JAE-Pre 08-0058, ENE2011-24761, CSD-2009-0050 and SEV-2012-0267) and the Helmholtz Association of German Research Centers through the portfolio topic MEM-BRAIN is kindly ...[+]
Financial support by the Spanish Government (Grants JAE-Pre 08-0058, ENE2011-24761, CSD-2009-0050 and SEV-2012-0267) and the Helmholtz Association of German Research Centers through the portfolio topic MEM-BRAIN is kindly acknowledged.
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Type:
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Artículo
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