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Browsing by Subject "Oxide"

Now showing items 1-16 of 16

Catalytic valorization of natural gas and biomass-derived feedstocks by metal oxides

Delgado Muñoz, Daniel (Universitat Politècnica de València, 2019-06-11)

[ES] La presente tesis doctoral se sitúa en el marco de la actual transición energética, que plantea la sustitución progresiva de materias primas de origen fósil por fuentes renovables, tanto para la obtención de productos ...
Dating archaeological lead artifacts from measurement of the corrosion content using the voltammetry of microparticles

Domenech Carbo, Mª Teresa; Domenech Carbo, Antonio; Peiró Ronda, María Amparo (American Chemical Society, 2011-05-23)

A methodology for dating archeological lead artifacts based on the voltammetry of microparticles is described. This methodology is based on the comparison of the height of speci¿c voltammetric features from PbO2 and PbO ...
Defective graphene as a metal-free catalyst for chemoselective olefin hydrogenation by hydrazine

Dhakshinamoorthy, Amarajothi; He, Jinbao; Franconetti, Antonio; Asiri, Abdullah M.; Primo Arnau, Ana Maria; García Gómez, Hermenegildo (The Royal Society of Chemistry, 2018-03-21)

[EN] A series of defective graphenes containing or not containing N, B, S and other heteroatoms exhibited general activity as metal-free catalysts for the hydrogenation of C=C double bonds by hydrazine in the presence of ...
Dual-phase membrane based on LaCo0.2Ni0.4Fe0.4O3-x-Ce0.8Gd0.2O2-x composition for oxygen permeation under CO2/SO2-rich gas environments

García-Fayos, Julio; Balaguer Ramirez, Maria; Baunmann, Stefan; Serra Alfaro, José Manuel (Elsevier, 2018)

[EN] A dual-phase material with high ambipolar conductivity composed by the perovskite LaCo0.2Ni0.4Fe0.4O3-delta (LCNF) as the electronic phase and the fluorite Ce0.8Gd0.2O2-delta (CGO20) as oxide-ion conductor is proposed ...
Electronic and elastic properties of yttrium gallium garnet under pressure from ab initio studies

Monteseguro, V.; Rodríguez-Hernández, P.; Lavín, V.; Manjón Herrera, Francisco Javier; Muñoz, A. (American Institute of Physics (AIP), 2013-05-14)

In this paper, we present an ab initio study within the framework of density functional theory employing the generalized gradient approximation applied to the study of the structural, elastic, and electronic properties of ...
Engineering microstructure and redox properties in the mixed conductor Ce0.9Pr0.1O2-d+Co 2 mol %

Balaguer Ramírez, María; Solis Díaz, Cecilia; Roitsch, Stefan; Serra Alfaro, José Manuel (Royal Society of Chemistry, 2014)

10% Praseodymium doped ceria exhibits a combination of mixed ionic and electronic conductivity, redox catalytic properties and chemical compatibility with water and carbon dioxide at high temperatures. Minor additions of ...
Mechanistic insights into the Nb2O5 and niobium phosphate catalyzed in situ condensation of a fluorescent halochromic assembly

Impellizzeri, Stefania; Simoncelli, Sabrina; Fasciani, Chiara; Marín García, Mª Luisa; Hallett-Tapley, Geniece L.; Hodgson, Gregory K.; Scaiano, Juan C. (Royal Society of Chemistry, 2015)

[EN] Solid niobium oxides (Nb2O5 center dot nH(2)O) and niobium phosphate were used as heterogeneous acid catalysts to promote the condensation between a switchable oxazine and a fluorescent coumarin in an aprotic solvent. ...
N-Doped graphene as a metal-free catalyst for glucose oxidation to succinic acid

Rizescu, Cristina; Podolean, Iunia; Albero-Sancho, Josep; Parvulescu, Vasile I.; Coman, Simona M.; Bucur, Cristina; Puche Panadero, Marta; García Gómez, Hermenegildo (The Royal Society of Chemistry, 2017-04-21)

[EN] N-Containing graphenes obtained either by simultaneous amination and reduction of graphene oxide or by pyrolysis of chitosan under an inert atmosphere have been found to act as catalysts for the selective wet oxidation ...
Optimization of the mixed protonic–electronic conducting materials based on (Nd5/6Ln1/6)5.5WO11.25−δ

Escolástico Rozalén, Sonia; Schroeder, Michael; Serra Alfaro, José Manuel (Royal Society of Chemistry, 2014)

[EN] The tungstates Ln6WO12 are proton conducting materials exhibiting mixed (protonic and electronic) conductivity and remarkable stability in moist CO2 environments. Hydrogen-permeable membranes made of this kind of ...
Pbca-Type In2O3: the high-pressure post-corundum phase at room temperature

García-Domene, B.; Sans Tresserras, Juan Ángel; Gomis, O.; Manjón Herrera, Francisco Javier; Ortiz, H. M.; Errandonea, Daniel; Santamaría Pérez, David; Martinez-Garcia, D.; Vilaplana Cerda, Rosario Isabel; Pereira, A. L. J.; Morales-Garcia, A.; Rodríguez Hernández, Plácida; Muñoz, Alfonso; Popescu, Catalin; Segura, A. (American Chemical Society, 2014-09-04)

High-pressure powder X-ray diffraction and Raman scattering measurements in cubic bixbyite-type indium oxide (c-In2O3) have been performed at room temperature. On increasing pressure c-In2O3 undergoes a transition to the ...
Prospects of Heterogeneous Hydroformylation with Supported Single Atom Catalysts

Amsler, Jonas; Sarma, Bidyut B.; Agostini, G.; Prieto González, Gonzalo; Plessow, P.; Studt, F. (American Chemical Society, 2020-03-18)

[EN] The potential of oxide-supported rhodium single atom catalysts (SACs) for heterogeneous hydroformylation was investigated both theoretically and experimentally. Using high-level domain-based local-pair natural orbital ...
Resistive switching and charge transport mechanisms in ITO/ZnO/p-Si devices

Blázquez, O.; Frieiro, J.L.; López-Vidrier, J.; Guillaume, C.; Portier, X.; Labbé, C.; Sanchis Kilders, Pablo; Hernández, S.; Garrido, B. (American Institute of Physics, 2018-10-29)

[EN] The resistive switching properties of ITO/ZnO/p-Si devices have been studied, which present well-defined resistance states with more than five orders of magnitude difference in current. Both the high resistance state ...
Structural and vibrational study of cubic Sb2O3 under high pressure

Pereira, A. L. J.; Gracia, L.; Santamaría-Pérez, D.; Vilaplana Cerda, Rosario Isabel; Manjón Herrera, Francisco Javier; Errandonea, D.; Nalin, M.; Beltrán, A. (American Physical Society, 2012-05-18)

We report an experimental and theoretical study of antimony oxide (Sb 2O 3) in its cubic phase (senarmontite) under high pressure. X-ray diffraction and Raman scattering measurements up to 18 and 25 GPa, respectively, have ...
Synthesis of gamma-lactones from easily and accessible reactants catalyzed by Cu-MnOx catalysts

Sabate-Fornons, Ferran; Navas Escrig, Javier; Sabater Picot, Mª José; Corma Canós, Avelino (Elsevier, 2018)

[EN] The mechanism of the oxidative [3+2] cycloaddition of alkenes with anhydrides using oxygen as an oxidant to synthesize gamma-lactones has been studied using a heterogeneous dual copper-manganese-based catalyst. The ...
Tungsten-titanium mixed oxide bronzes: Synthesis, characterization and catalytic behavior in methanol transformation

Delgado-Muñoz, Daniel; Soriano Rodríguez, Mª Dolores; Solsona Espriu, Benjamín Eduardo; Zamora Blanco, Segundo; Agouram, Said; Concepción Heydorn, Patricia; López Nieto, José Manuel (Elsevier, 2019-07-25)

[EN] Tungsten oxide bronze-based materials show extremely adaptive structural and compositional features that make them suitable for functional properties modulation. Herein we report the preparation of a series of ...
Utilización de biomasa como combustible en una celda de combustiblede óxido sólido

Castillo Genís, Carlos (Universitat Politècnica de València, 2020-05-06)

[ES] Este trabajo se centra en el uso de biomasa como combustible en una celda de combustible de óxido sólido. Se puede separar en dos partes. La primera es una parte teórica que explica qué es una celda de combustible, ...