Listar por autor "Marrero-López, David"

Mostrando ítems 1-14 de 14

    • Ajuste de las propiedades estructurales de molibdatos de lantano a través de la modificación de los entramados catiónicos y aniónicos 

      Porras-Vázquez, José Manuel; Bergillos-Ruíz, Marta; López-Vergara, Adrián; Marrero-López, David; Losilla, Enrique R. (2018-06-28)
      Los materiales basados en molibdatos de lantano, con fórmula general La6-xMoO12-, son candidatos a membranas de separación de hidrógeno debido su conductividad electrónica y protónica. Estos cristalizan en diferentes ...

    • Ce0.8Gd0.2O2‐δ / La0.6Sr0.4CoO3 Heterostructures prepared by pulsed laser deposition 

      Dos Santos-Gómez, Lucía; Porras-Vázquez, José Manuel; Ramirez-Losilla, Enrique; Marrero-López, David (2018-09-14)
      Oxide interfaces have received greater attention due to the possibility to obtain properties that are very different from bulk materials. Due to the wide variety of electronic and ionic phenomena than can be detected at ...

    • Compatibility and performance of SOFCs based on lanthanum tungstates 

      Dos Santos-Gómez, Lucía; Porras-Vázquez, José Manuel; Zayas-Rey, María José; Ramírez Losilla, Enrique; Marrero-López, David (2015-07-10)
      Rare-earth tungstates with general composition “Ln6WO12” have attracted great attention in last few years due to their relatively high mixed proton-electron conductivity [1, 2]. One of the main ad-vantages of these ...

    • Desarrollo y control microestructural en materiales para pilas de combustible de óxidos sólidos 

      Dos Santos Gomez, Lucia (UMA Editorial, 2018-10-17)
      Las pilas de combustible de óxidos sólidos (SOFCs) son una de las alternativas más prometedoras para producir energía eléctrica de manera eficiente y respetuosa con el medio ambiente. Durante la fabricación de una SOFC es ...

    • Effect of preparation conditions on the polymorphism and transport properties of lanthanum molybdates 

      Porras-Vázquez, José Manuel; López-Vergara, Adrián; Infantes-Molina, A.; Canales-Vázquez, J.; Cabeza-Diaz, Aurelio; [et al.] (2017-10-24)
      In this work, La6MoO12-based compounds were investigated as part of a new family of materials very competitive as hydrogen separation membranes [1,2]. La5.4MoO11.1 was synthesized by the freeze-drying precursor method and ...

    • Effect of the modification of the cationic and anionic framework on the structural and electrical properties of lanthanum molybdates 

      López-Vergara, Adrián; Bergillos-Ruíz, Marta; Porras-Vázquez, José Manuel; Marrero-López, David; Losilla, Enrique R. (2019-07-19)
      Fluorinated lanthanum molybdates have been prepared at 1500 and 1200 ºC for 1 h and cooled down at 5 ºC min-1. The combination of anionic (F-) and cationic (Nb5+) doping stabilizes the cubic polymorph without needing a ...

    • High efficiency cathodes for SOFCs prepared by spray-pyrolysis 

      Dos Santos-Gómez, Lucía; Ramírez Losilla, Enrique; Marrero-López, David (2015-07-10)
      In recent years, lowering the operating temper-ature of the Solid Oxide Fuel Cells (SOFCs) to the intermediate temperature range (500-700 ºC) has become the main challenge for this technology. The electrolyte resistance ...

    • Influence of lanthanum doping on the structure and transport properties of CeO2 

      Zamudio-García, J; Porras-Vázquez, José Manuel; Dos Santos-Gómez, Lucía; Losilla, Enrique R.; Marrero-López, David (2019-06-10)
      LaxCe1-xO2-x/2 materials are oxide and/or proton conductors depending on the La-content and they are of interest for numerous electrochemical applications at high temperatures, including membranes for hydrogen separation ...

    • Influence of Nb-doping on the structural and electrical properties of lanthanum molybdates, La5.4MoO11.1 

      López-Vergara, Adrián; Porras-Vázquez, José Manuel; Vollestad, Einar; Canales-Vázquez, J.; Ramirez-Losilla, Enrique; [et al.] (2018-06-28)
      Nowadays, hydrogen is receiving a great deal of attention as an energy carrier. Commonly, it is obtained by hydrocarbons reforming, such as natural gas, coal and biomass. However, the resulting hydrogen needs to be purified ...

    • 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, E. (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 ...

    • 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 ...

    • Solid Oxide Fuel Cells based on Lanthanum Tungstates Electrolytes 

      Porras-Vázquez, José Manuel; Zayas-Rey, María José; Ramírez-Losilla, Enrique; Marrero-López, David; Dos Santos-Gómez, Lucía (2015-07-13)
      Lanthanum tungstate with composition La27W4NbO55- (LWNO) has been tested as proton conductor electrolyte for Solid Oxide Fuel Cells (SOFCs). For this purpose, different electrodes and composite electrodes are considered, ...

    • Stability of epitaxial heterostructured materials 

      Dos Santos-Gómez, Lucía; Sanna, Simone; Esposito, Vincenzo; Pryds, Nini; Marrero-López, David; [et al.] (2019)
      Heterostructured materials are a new family of artificial compounds where the electronic and ionic properties can be modulated by varying the characteristics of the different material layers. These properties arise from ...

    • Structural analysis and sintering aids effects in La2Ce2O7 proton conductors 

      Zamudio-García, J; Porras Vázquez, José Manuel; Losilla, Enrique R.; Marrero-López, David (2018-11-15)
      Global warming is an important problem that has to be solved without delay. The development of environmental-friendly energy technology is needed to deal with this issue. Solid Oxide Fuel Cells (SOFC) technology has been ...