QICM - Artículos: Envíos recientes
Mostrando ítems 21-40 de 200
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Evaluation of the ZrO2/Al2O3 system as catalysts in the catalytic transfer hydrogenation of furfural to obtain furfuryl alcohol
Jiménez Gómez, Carmen Pilar; Viar-Antuñano, N.; Cecilia-Buenestado, Juan Antonio
; Moreno-Tost, Ramón; Mérida-Robles, Josefa María; Requies, Jesús M.; Maireles-Torres, Pedro Jesús[et al.] (Elsevier, 2021)
ZrO2, Al2O3 and ZrO2/Al2O3 with different Zr/Al molar ratio, have been synthesized by coprecipitation and subsequent calcination. The resulting catalysts were characterized by X-ray diffraction, transmission electron microscopy, ... -
Enhancing the Electrochemical Performance in Symmetrical Solid Oxide Cells through Nanoengineered Redox-Stable Electrodes with Exsolved Nanoparticles
Zamudio-García, Javier; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David (American Chemical Society, 2023-12-25)
Symmetrical solid oxide cells (SSOCs) have recently gained significant attention for their potential in energy conversion due to their simplified cell configuration, cost-effectiveness, and excellent reversibility. However, ... -
CuO metallic aerogels with a tailored nodular morphology
(RSC (Royal Society of Chemistry), 2023-09-28)This work reports, for the first time, an efficient and fast microwave-based method for the preparation of CuO aerogels. For that, CuCl2, glyoxylic acid and sodium carbonate are employed as reagents. Different experimental ... -
Selective production of furan from gas-phase furfural decarbonylation on Ni-MgO catalysts.
Jiménez-Gómez, Carmen Pilar; Cecilia-Buenestado, Juan Antonio; García-Sancho, Cristina; Moreno-Tost, Ramón; Maireles-Torres, Pedro Jesús (American Chemical Society, 2019-03-13)
A series of Ni-MgO catalysts (Ni/Mg molar ratio: 0.1-0.3), prepared by a coprecipitation-calcination-reduction methodology, was characterized and evaluated in the gas-phase hydrogenation of furfural. In all cases, after ... -
Effect of the treatment with H3PO4 on the catalytic activity of Nb2O5 supported on Zr-doped mesoporous silica catalyst. Case study: glycerol dehydration.
García-Sancho, Cristina; Cecilia-Buenestado, Juan Antonio; Mérida-Robles, Josefa María; Santamaría-González, José; Moreno-Tost, Ramón; Infantes-Molina, Antonia; Maireles-Torres, Pedro Jesús[et al.] (Elsevier B.V., 2017-09-06)
We have previously demonstrated the influence of the niobium species over the glycerol dehydration reaction and how the catalyst regeneration by thermal treatment modified the catalytic performance due to the transformation ... -
Semi-continuous mechanochemical process for biodiesel production under heterogeneous catalysis using calcium diglyceroxide
Malpartida-García, Irene; Maireles-Torres, Pedro Jesús; Vereda-Alonso, Carlos; Rodríguez-Maroto, José Miguel; Halloumi, Samy; Lair, Valentin; Thiel, Julien; Lacoste, François[et al.] (Elsevier Ltd., 2020-05-26)
This work is aimed at the development of a semi-continuous mechanochemical process for biodiesel production and the subsequent valorization of glycerol, its by-product, via its conversion into calcium diglyceroxide using ... -
Processing of calcium sulfoaluminate eco-cement coatings containing microencapsulated phase change materials.
Romero-Espinosa, Andrea; Sanfélix, Susana G.; Morales-Cantero, Alejandro; Cuesta-García, Ana María; Kjøniksen, Anna-Lena; García-Aranda, Miguel Ángel; Gómez-de-la-Torre, María de los Ángeles; Santacruz-Cruz, María Isabel[et al.] (ICE Publishing, 2023-11-11)
On the one hand, calcium sulfoaluminate (CSA) eco-cements release about 40% less carbon dioxide (CO2) than Portland cement during fabrication; on the other hand, phase change materials dispersed in a cementitious matrix ... -
Highly oriented and fully dense CGO films prepared by spray-pyrolysis and different precursor salts.
Dos-Santos-Gómez, Lucía; Zamudio-García, Javier; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David (Elsevier, 2020-03-19)
CeO2–based thin films are prepared by spray-pyrolysis deposition from different aqueous precursor solutions containing nitrate, chloride or acetate salts. The morphology and orientation growth strongly depends on the precursor ... -
Unravelling Crystal Superstructures and Transformations in the La6−xMoO12−δ (0.6 ≤ x ≤ 3.0) Series: A System with Tailored Ionic/ Electronic Conductivity.
López Vergara, Adrián; Vizcaíno-Anaya, Lucía; Porras-Vázquez, José Manuel; Baldinozzi, Gianguido; Dos-Santos-Gómez, Lucía; Canales-Vázquez, J.; Marrero-López, David; Ramírez-Losilla, Enrique[et al.] (American Chemical Society, 2020-08-03)
Crystalline La6−xMoO12−δ materials with different lanthanum/molybdenum ratios (0.6 ≤ x ≤ 3.0) have been prepared via a freeze-drying precursor route. The influence of the lanthanum content, sintering temperature, and ... -
A review on recent advances and trends in symmetrical electrodes for solid oxide cells.
Zamudio-García, Javier; Caizán-Juanarena, Leire; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David (Elsevier, 2021-12-04)
Symmetrical solid oxide cells (SSOCs) with identical air and fuel electrodes have gained significant scientific interest in the last decade because they offer several advantages over conventional cell configurations. ... -
Efficient symmetrical electrodes based on LaCrO3 via microstructural engineering.
Zamudio-García, Javier; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David (Elsevier, 2021-09-30)
Novel nanostructured electrodes, La0.98Cr0.75B0.25O3δ (B = Mn, Fe, Ti and Cu), are prepared by a single spraypyrolysis deposition method directly on the electrolyte and a porous Ce0.9Gd0.1O1.95 (CGO) scaffold. ... -
Synergic Effect of Metal and Fluorine Doping on the Structural and Electrical Properties of La5.4MoO11.1-Based Materials.
López Vergara, Adrián; Bergillos-Ruíz, Marta; Zamudio-García, Javier; Porras-Vázquez, José Manuel; Canales-Vázquez, J.; Marrero-López, David; Ramírez-Losilla, Enrique[et al.] (American Chemical Society, 2020-01-07)
Cationic and anionic frameworks of La5.4MoO11.1 proton conductors have been modified by means of metal (Ti4+, Zr4+, and Nb5+) and fluorine (F−) doping. This synergic effect leads to the stabilization of highsymmetry and ... -
Recent progress in nanostructured electrodes for solid oxide fuel cells deposited by spray pyrolysis.
Dos-Santos-Gómez, Lucía; Zamudio-García, Javier; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David (Elsevier, 2021-07-21)
Low-temperature solid oxide fuel cells (LT-SOFCs), operating below 650 ◦C, are attracting a great interest due to their long-term stability and potential application for stationary and portable power generation. Much ... -
A novel multilaminated composite cathode for solid oxide fuel cells.
Dos-Santos-Gómez, Lucía; Porras-Vázquez, José Manuel; Martín-Jiménez, Francisco de Paula; Ramos-Barrado, José Ramón; Ramírez-Losilla, Enrique; Marrero-López, David[et al.] (Elsevier, 2019-05-28)
A novel electrode architecture consisting in alternating layers of La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) and Ce0.9Gd0.1O1.95 (CGO) is prepared for the first time by spray-pyrolysis deposition and investigated as cathode material ... -
LSCF-CGO nanocomposite cathodes deposited in a single step by spraypyrolysis.
Dos-Santos-Gómez, Lucía; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Martín-Jiménez, Francisco de Paula; 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 ... -
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 ... -
Impact of the lanthanide size on the polymorphism and electrical properties of Ln5.4MoO11.1 (Ln = Nd, Sm and Gd)
Rubio-Vives, Rafael; Porras-Vázquez, José Manuel; Dos-Santos-Gómez, Lucía; Zamudio-García, Javier; Infantes-Molina, Antonia; Canales-Vázquez, J.; Marrero-López, David; Ramírez-Losilla, Enrique[et al.] (Elsevier, 2023)
Mixed proton-electronic conductors are of great interest for high temperature electrochemical devices, such as hydrogen separation membranes. In this contribution, ceramics with composition Ln5.4MoO11.1 (Ln = Nd, Sm and ... -
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 ... -
Doping effects on the structure and electrical properties of La2Ce2O7 proton conductors.
Zamudio-García, Javier; Dos-Santos-Gómez, Lucía; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David (Elsevier, 2020-01-01)
Recent studies have reported that the conductivity of La2Ce2O7 proton conductors is improved by aliovalent doping, despite the high concentration of oxygen vacancies in the pristine material. In this study, we provide ... -
Perspectives on Cathodes for Protonic Ceramic Fuel Cells.
Mather, Glenn; Muñoz-Gil, Daniel; Zamudio-García, Javier; Porras-Vázquez, José Manuel; Marrero-López, David; Pérez-Coll, Domingo[et al.] (MDPI, 2021-06-09)
Protonic ceramic fuel cells (PCFCs) are promising electrochemical devices for the efficient and clean conversion of hydrogen and low hydrocarbons into electrical energy. Their intermediate operation temperature (500–800 ...