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Listar por autor "Ramírez-Losilla, Enrique"
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Influence of Proton Conducting Cations on the Structure and Properties of 2D Anilate-Based Magnets
Palacios Corella, Mario; Fernández Espejo, Alejandro; Bazaga-García, Montse; Ramírez-Losilla, Enrique; Cabeza-Díaz, Aurelio; Clemente-León, Miguel; Coronado, Eugenio[et al.] (ACS publications, 2017-11-01)The syntheses, structures, magnetic, and proton conductivity properties of a family of bimetallic anilate-based compounds with inserted alkylammonium cations are presented. The structures of (Me2NH2)[MnIICrIII(Br2An)3]·2H2O ... -
Investigation of PO4 3- oxyanion-doping on the properties of CaFe0.4Ti0.6O3 d for potential application as symmetrical electrodes for SOFCs
Dos-Santos-Gómez, Lucía; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David; Slater, Peter (Elsevier, 2020)CaTi0.6-xFe0.4PxO3-d (0 x 0.075) perovskite series are investigated as potential symmetrical electrodes for SOFCs. Pure phase compounds with a cubic perovskite structure (s.g. Pm3m) are obtained for x 0.025, while ... -
La0.8Sr0.2MnO3-d-based nanocomposite functional layers for improved cathode efficiency in SOFCs
Caizán-Juanarena, Leire; Zamudio-García, Javier; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David (2022)Solid Oxide Fuel Cells (SOFC) are efficient electrochemical devices that are able to convert chemical energy in the form of fuels into electricity, but at low operating temperatures they are mainly limited by the high ... -
LaCrO3–CeO2-Based Nanocomposite Electrodes for Efficient Symmetrical Solid Oxide Fuel Cells
Zamudio-García, Javier; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David (2022-04-05)La0.98Cr0.75Mn0.25O3−δ–Ce0.9Gd0.1O1.95 (LCM-CGO) nanocomposite layers with different LCM contents, between 40 and 60 wt %, are prepared in a single step by a spray-pyrolysis deposition method and evaluated as both air and ... -
Lanthanum Molybdates: a comprehensive study for hydrogen separation membranes
López Vergara, Adrián (UMA Editorial, 2023)En esta Tesis doctoral, los materiales La6−xMoO12−δ (0 ≤ x ≤ 0.8) se investigan como una nueva familia de conductores cerámicos de protones. Se obtienen diferentes fases polimórficas con estructura romboédrica y cúbica, ... -
Layered Lanthanide Sulfophosphonates and Their Proton Conduction Properties in Membrane Electrode Assemblies
Bazaga-García, Montse; Salcedo, Inés R.; Pérez-Colodrero, Rosario Mercedes; Xanthopoulos, Konstantinos; Villemin, Didier; Stock, Norbert; López-González, Mar; Del Río, Carmen; Ramírez-Losilla, Enrique; Cabeza-Díaz, Aurelio; Demadis, Konstantinos D.; Olivera-Pastor, Pascual[et al.] (ACS publications, 2019-11-07)Metal phosphonates containing acidic groups exhibit a wide range of proton conduction properties, which may enhance the performance of membrane electrode assemblies (MEAs). In this work, focus is placed on proton conduction ... -
LSCF-CGO nanocomposite cathodes deposited in a single step by spraypyrolysis.
Dos-Santos-Gómez, Lucía; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Martín, Francisco; Ramos-Barrado, José Ramón; Marrero-López, David[et al.] (Elsevier, 2018-01-01)La0.6Sr0.4Co0.2Fe0.8O3-δ-Ce0.9Gd0.1O1.95 (LSCF-CGO) nanostructured cathodes with different LSCF-content are prepared in a single step by spray-pyrolysis deposition, simplifying notably the fabrication process compared ... -
Metal-Doping of La5.4MoO11.1 Proton Conductors: Impact on the Structure and Electrical Properties.
López Vergara, Adrián; Porras-Vázquez, José Manuel; Vøllestad, Einar; Canales-Vázquez, J.; Ramírez-Losilla, Enrique; Marrero-López, David[et al.] (American Chemical Society, 2018-10-03)La5.4MoO11.1 proton conductors with different metal doping (Ca2+, Sr2+, Ba2+, Ti4+, Zr4+, and Nb5+) have been prepared and structurally and electrically characterized. Different polymorphs are stabilized depending on ... -
Microstructural tailoring of nanocomposite electrodes for solid oxide fuel cells
Zamudio-García, Javier (UMA Editorial, 2023)The high demand for electrical energy induced by the rapid population growth has arisen the necessity to develop sustainable and environmentally friendly energy sources. In this context, fuel cells are one of the ... -
Modification of the Microstructure and Transport Properties of La2CuO4−δ Electrodes via Halogenation Routes
Dos-Santos-Gómez, Lucía; Zamudio-García, Javier; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David (IOAP-MPDI, 2022-06-16)dos Santos-Gómez L, Zamudio-García J, Porras-Vázquez JM, R. Losilla E, Marrero-López D. Modification of the Microstructure and Transport Properties of La2CuO4−δ Electrodes via Halogenation Routes. Processes. 2022; 10(6):1206. ... -
Nanocrystalline cathodes for PC-SOFCs based on BCZY
Dos-Santos-Gómez, Lucía; Zea-Garcia, Jesus D.; Porras-Vázquez, José Manuel; Marrero-López, David; Ramírez-Losilla, Enrique (2016-09-27)Perovskites based on BaCeO3-δ exhibit the highest proton conductivity among this class of materials, however, they are susceptible to hydration and carbonation in presence of water vapor and CO2 [1]. In contrast, the ... -
Nanostructured BaCo0.4Fe0.4Zr0.1Y0.1O3- Cathodes with Di erent Microstructural Architectures
Dos-Santos-Gómez, Lucía; Zamudio-García, Javier; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David (MDPI, 2020-05-30)Lowering the operating temperature of solid oxide fuel cells (SOFCs) is crucial to make this technology commercially viable. In this context, the electrode e ciency at low temperatures could be greatly enhanced by ... -
Nanostructured composites as active layer to boost cathode performance in Solid Oxide Fuel Cells
Caizán-Juanarena, Leire; Zamudio-García, Javier; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David (2022-04)Since the efficiency of Solid Oxide Fuel Cells (SOFCs) is largely limited by the high polarization resistance of the cathode, several strategies have been proposed to enhance the electrochemical activity of such electrodes. ... -
New multifunctional sulfonato-containing metal phosphonates proton conductors
Salcedo, Inés R.; Bazaga-García, Montse; Pérez-Colodrero, Rosario Mercedes; Xanthopoulos, Konstantinos; Demadis, Konstantinos D.; Stock, Norbert; Cabeza-Díaz, Aurelio; Ramírez-Losilla, Enrique; Olivera-Pastor, Pascual[et al.] (2018-10-01)Anchoring of acidic functional groups to organic linkers acting as ligands in metal phosphonates has been demonstrate to be a valid strategy to develop new proton conductor materials, which exhibit tunable properties and ... -
NH3/H2O-mediated proton conductivity and photocatalytic behaviour of Fe(II)-hydroxyphosphonoacetate and M(II)-substituted derivatives
Salcedo, Inés R.; Bazaga-García, Montse; Cuesta-García, Ana María; Ramírez-Losilla, Enrique; Demadis, Konstantinos D.; Olivera-Pastor, Pascual; Pérez-Colodrero, Rosario Mercedes; Cabeza-Díaz, Aurelio[et al.] (The Royal Society of Chemistry, 2019-12-27)Synthesis redesign and derivatisation of Fe(II)-hydroxyphosphonoacetate, incorporating different ammonia loads and M(II) isomorphic substitutions (M = Mn, Co and Zn), have been implemented. The NH3 adsorption led to materials ... -
Ni-Doped PrBaFe2O5+δ As Symmetrical Electrode for Solid Oxide Cells.
Caizán-Juanarena, Leire; Zamudio-García, Javier; Dos-Santos-Gómez, Lucía; López Vergara, Adrián; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David[et al.] (2023)The development of new redox stable electrode materials for Solid Oxide Cells (SOFs) have attracted great attention in recent years, since finding suitable compositions to operate efficiently in both fuel cell and electrolyzer ... -
Novel microstructural strategies to enhance the electrochemical performance of La0.8Sr0.2MnO3-δ cathodes
Dos-Santos-Gómez, Lucía; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David (2015-07-13)Solid oxide fuel cells (SOFCs) are one of the most efficient technologies for direct conversion of fuels to electricity. La0.8Sr0.2MnO3-δ (LSM) is the cathode material most widely used in SOFCs [1], however, LSM exhibits ... -
One step synthesis of nanocomposite electrodes for reversible electrochemical cells.
Dos-Santos-Gómez, Lucía; Zamudio-García, Javier; Caizán-Juanarena, Leire; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David[et al.] (2023)The irregular and seasonal disposition of renewable energy requires advanced devices for energy storage and conversion. Reversible electrochemical cells can address this approach by operating as both electrolyzer and fuel ... -
Preparación cristaloquímica y comportamiento eléctrico de electrolitos sólidos de estequiometría NASICON
Maldonado Manso, María Pilar (Universidad de Málaga, Servicio de Publicaciones, 2004)En el presente trabajo se ha llevado a cabo la preparación y la caracterización estructural y eléctrica de varias series de materiales de estequiometría NASICON, sistema ampliamente conocido por sus propiedades conductoras ... -
Preparation and hydration of model ecocement phases. Characterization by diffraction and cognate methods
Cuesta-García, Ana María (Servicio de Publicaciones y Divulgación Científica, 2015)La producción de cementos de sulfoaluminato de calcio (CSA, del inglés Calcium SulfoAluminate) es más respetuosa para el medio ambiente que la de los cementos Portland ordinarios (OPC, del inglés Ordinary Portland Cement) ...