Listar QICM - Contribuciones a congresos científicos por título
Mostrando ítems 153-172 de 216
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Si-Al nanospheres for the valorization of galactose and agarose into 5-hydroxymethylfurfural.
(2023)5-hydroxymethylfurfural (HMF) is a compound that has gained attention to potentially substitute fossil resources in areas such as the polymer industry or the production of energy vectors. HMF is produced from the acid ... -
Sílices mesoporosas KIT-6 funcionalizadas como catalizadores ácidos para la deshidratación de sorbitol a isosorbida
(2019-06-28)La modificación de sílices mesoporosas mediante la incorporación de heteroátomos (Zr, Al, Ti, entre otros) y/o tratamiento con ácidos minerales es una estrategia atractiva en catálisis heterogénea para la preparación de ... -
Single and solid solutions metal carboxyphosphonates as precursors for phosphorous-containing electrocatalysts
(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 ... -
Síntesis hidrotermal de tobelita rica en Mg
(2018-07-10)La tobelita ha sido descrita en ambientes de baja temperatura y sintetizada a diferentes temperaturas. Además de tobelita se han sintetizado los términos intermedios entre tobelita y moscovita, a partir de caolinita. En ... -
Sm0.5Sr0.5CoO3-δ - Ce0.9Sm0.1O1.95 nanocomposites for reversible electrochemical cells.
(2023)The generation of electricity through environmentally friendly sources of energy has been one of the main challenges of our society in the last decades. Nevertheless, the irregular and seasonal disposition of renewable ... -
Solid Oxide Fuel Cells based on Lanthanum Tungstates Electrolytes
(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, ... -
Solución sólida en micas sintetizadas hidrotermlamente a partir de caolinita a 400ºC
(2019-06-28)La transformación de caolinita en mica dioctaédrica ha sido descrita y sintetizada en diferentes condiciones de temperatura, pH y ambientes químicos (Chermark y Rimstidt, 1990; Huang, 1993; Bauer et al., 1998; Bentabol ... -
Stability of epitaxial heterostructured materials
(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
(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 ... -
Structural Characterization of Transition-Metal Carboxyethanephosphonates as Precursors of Electrocatalysts
(2023)Phosphorus-containing coordination polymers (CPs) are considered as one of the most promising precursors of materials alternative to the highly expensive commercial catalysts (Pt, Ru and Ir) used in polymeric fuel cells ... -
Structural study of the local order in ammonia-modulated FE(II) hydroxyphosphonoacetate proton conductors
(2017-10-17)Layered Fe(II) carboxiphosphonate, Fe-HPAA·2H2O, is a crystalline multifunctional coordination polymer exhibiting properties as photocatalyst and proton conductor. Postsynthesis modification by ammonia/water adsorption ... -
Structural Variability in Multifunctional Metal Xylenediaminetetraphosphonate Hybrids
(2013)The two cornerstones in the field of MOFs are the Secondary Building Units (SBU’s or “bricks”) and the organic linkers. The structural tunability of crystalline MOFs coupled, when possible, with high chemical and thermal ... -
Structure-properties correlations in divalent metal phosphonates
(2016)Crystalline metal phosphonates may offer acidic sites, structural flexibility and guest molecules (H2O, heterocyclics, etc.) which can act as proton carriers. In addition, some frameworks are also amenable for post‐synthesis ... -
Study of mixed molybdates of lanthanum and praseodymium, La5.4-xPrxMo1-yNbyO12-δ, for H2 separation membranes
(2024-01)This research explores the impact of praseodymium and niobium doping on the La5.4-xPrxMo1-yNbyO12- _series (x= 1.35, 2.7, 4.05, 5.4; y= 0, 0.1) as materials with mixed proton-ionic conductivity suitable for hydrogen ... -
Study of mixed Pr/La molybdates, La5.4-xPrxMo1-yNbyO12-δ, for hydrogen separation membranes.
(2023)Lanthanide molybdates, with general formula Ln5.4MoO11.1-, are materials with mixed proton-ionic conductivity that can be used as hydrogen separation membranes. Their symmetry (cubic or rhombohedral) depends on the synthetic ... -
Sulphated KIT6-Zr as an efficient solid acid catalyst for the production of isosorbide from sorbitol
(2018-07-17)In recent years, the development of new catalytic processes for the transformation of sugars is converting lignocellulosic biomass in a sustainable and renewable feedstock for the production of biofuels and high value-added ... -
Supported nickel nitride catalysts for the gas-phase hydrogenation of furfural
(2019-05-21)A series of catalysts with different nickel loading (2.5-30 wt%) has been prepared by UGR. The preparation of Ni3N phase was ascertained via Powder X-rays diffraction together with cubic nickel . The elemental chemical ... -
Synchrotron pair distribution function approach applied to cement samples
(2019-10-14)The characterization of the nanocrystalline/amorphous materials is very challenging but the presence of these materials mixed with large amounts of crystalline phases makes the analysis even more complicated. This is the ... -
Synchrotron X-ray pair distribution function analysis of calcium silicate pastes
(2021)The analysis of nanocrystalline and amorphous phases in cement matrices which contain high amounts of crystalline phases is a very challenging task. In this respect, pair distribution function (PDF) methodology in ... -
Synchrotron X-ray pair distribution function analysis of tricalcium silicate pastes
(2019-09-24)The analysis of nanocrystalline and amorphous components within cement pastes that contain high amounts of crystalline phases is very challenging. Synchrotron powder diffraction jointly with the pair distribution function ...