Listar por autor "López Vergara, Adrián"
Mostrando ítems 1-13 de 13
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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 ... -
Effect of preparation conditions on the polymorphism and transport properties of lanthanum molybdates
Porras-Vázquez, José Manuel; López Vergara, Adrián; Infantes-Molina, Antonia; Canales-Vázquez, J.; Cabeza-Díaz, Aurelio; Losilla, Enrique R.; Marrero-López, David[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 ... -
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.; Ramírez-Losilla, Enrique; Marrero-López, David[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 ... -
Lanthanum Molybdates: a comprehensive study for hydrogen separation membranes
(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, ... -
Metal carboxyphosphonates-based electrocatalysts
López Vergara, Adrián; El-Refaei, S.M.; Russo, Patricia A.; Vilchez, A; Losilla, Enrique R.; Porras-Vázquez, José Manuel; Olivera-Pastor, Pascual; Pinna, N; Cabeza-Díaz, Aurelio[et al.] (2019-10-01)
Co1-xFex-HPAA metal phosphonates were prepared and pyrolyzed under N2 and H2/Ar flows. The resulting powders were structural and electrochemically characterized by XRD and CV, respectively. The obtained materials possess ... -
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 ... -
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 ... -
Single and solid solutions metal carboxyphosphonates as precursors for phosphorous-containing electrocatalysts
López Vergara, Adrián; El-Refaei, S.M.; Russo, Patricia A.; Vilchez, A; Losilla, Enrique R.; Porras-Vázquez, José Manuel; Olivera-Pastor, Pascual; Pinna, N; Cabeza-Díaz, Aurelio[et al.] (2019-07-19)
Co1-xFex-HPAA metal phosphonates were prepared and pyrolyzed under N2 and H2/Ar flows. The result-ing powders were structural and electrochemically characterised by XRD and CV, respectively. The ob-tained materials possess ... -
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 ... -
Synthesis and characterization of M(II) phosphonates (M = Fe, Co, Zn, Mn) as precursors for PEMFCs electrocatalysts
López Vergara, Adrián; Salcedo, Inés R.; Bazaga-García, Montse; Olivera-Pastor, Pascual; Cabeza-Díaz, Aurelio; Losilla, Enrique R.; Porras-Vázquez, José Manuel[et al.] (2018-11-15)
Metal phosphonates are promising precursors for applications such as proton conductivity [1] and catalysis [2]. Specifically, upon calcination metal polyphosphates are generated that can be used as non-noble metal alternatives ... -
Transition metal hydroxyphosphonoacetates as precursors of electrocatalysts
Vílchez-Cózar, Álvaro; Pérez-Colodrero, Rosario Mercedes; Bazaga-García, Montse; Salcedo, Inés R.; Olivera-Pastor, Pascual; Cabeza-Díaz, Aurelio; López Vergara, Adrián[et al.] (2021-01-29)
Coordination polymers (PCs) are widely studied due to their applicability in many fields. Among them, metal phosphonates are attractive materials due to their great structural and functional diversity, as proton conductors ... -
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 ...