Buscar
Mostrando ítems 171-179 de 179
Estudio de la factibilidad de fabricación de celdas solares de perovskitas en Argentina mediante análisis de ciclo de vida e indicadores energéticos.
(Asociación Argentina de Energías Renovables y Ambiente, 2019-07)
Las celdas solares de perovskita (PSC por sus siglas en inglés) son objeto de estudio en el campo de las energías renovables gracias a sus elevadas eficiencias de fotoconversión. En este trabajo se presenta el análisis de ...
Crystallographic and magnetic structure of SrCoO2.5 brownmillerite: Neutron study coupled with band-structure calculations
(American Physical Society, 2008-08-05)
A study of the crystallographic and magnetic structure of SrCoO2.5 with a brownmillerite-type structure has been carried out from neutron powder-diffraction (NPD) measurements at temperatures ranging from 10 to 623 K, ...
An insight into the electrochemical performance of La0.5-XPrxBa0.5CoO3- δ as cathodes for solid oxide fuel cells: Study of the O2-reduction reaction
(Royal Society of Chemistry, 2018-08)
New LT-SOFC cathodes with La0.5-xPrxBa0.5CoO3-δ (0 ≤ x ≤ 0.5) compositions were studied. The La-rich compounds exhibit an inter-growing cubic and tetragonal structure whereas the Pr-rich show a tetragonal structure. Cathode ...
Temperature and high-pressure dependent x-ray absorption of SmNiO 3 at the Ni K and Sm L 3 edges
(IOP Publishing, 2015-12)
We report on XANES and EXAFS measurements of SmNiO3 from 20 K to 600 K and up to 38 GPa at the Ni K- and Sm L3- edges. A multiple component pre- Ni K-edge tail is understood originating from 1s transitions to 3d-4p states ...
Synthesis, crystal chemistry and physical properties of the Ruddlesden-Popper phases Sr3Fe2-xNi xO7-δ (0≤x≤1.0)
(Academic Press Inc Elsevier Science, 2005-05)
The crystal chemistry, electronic structure, and electrical and magnetic properties of the novel perovskite-related nickel oxides Sr3Fe 2-xNixO7-δ with 0≤x≤1.0 have been studied. X-ray diffraction and selected area electron ...
Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0)
(Royal Society of Chemistry, 2013-11)
The role of W content on the limit oxygen partial pressure (pO2) for stability of fast oxygen-ion conductors La2Mo2−yWyO9 with y = 0, 0.5 and 1.0 has been studied by means of thermogravimetric analysis (TGA) under ...
Crystal structure, cobalt and iron speciation and oxygen non-stoichiometry of La0.6Sr0.4Co1-yFeyO3-δ nanorods for IT-SOFC cathodes
(Elsevier Science SA, 2020-03)
Single-phased La0.6Sr0.4Co1-yFeyO3-δ (y = 0.2, 0.5, 0.8) nanorods exhibiting the rhombohedral perovskite-type phase were synthesized by a pore-wetting technique. We studied their chemical composition, crystal and electronic ...
Time-Retrenched Synthesis of BaTaO2N by Localizing an NH3 Delivery System for Visible-Light-Driven Photoelectrochemical Water Oxidation at Neutral pH: Solid-State Reaction or Flux Method?
(American Chemical Society, 2021-09)
Among 600 nm class transition-metal oxynitrides, BaTaO2N with a cubic Pm3¯ m perovskite-type structure is promising for solar water oxidation due to its absorption of visible light up to 660 nm, narrower band gap (Eg = 1.9 ...
Effect of Pr-doping on structural, electrical, thermodynamic, and mechanical properties of BaCeO3-d as proton conductor
(Electrochemical Society, 2014)