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Listar por palabra clave "Catalysts"

Mostrando ítems 1-20 de 38

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Activity of ceria and ceria-supported gold nanoparticles for the carbamoylation of aliphatic amines by dimethyl carbonate

Juárez Marín, Raquel; Corma Canós, Avelino; García Gómez, Hermenegildo (International Union of Pure and Applied Chemistry, 2011-09-19)

Aliphatic amines react sluggishly with dimethyl carbonate (DMC) to give a mixture of N-methylation and carbamoylation. Nanoparticulated ceria as catalyst increases, in general, conversion and selectivity toward carbamoylation. ...
Aerobic oxidation of cycloalkenes catalyzed by iron metal organic framework containing N-hydroxyphthalimide

Dhakshinamoorthy, Amarajothi; Alvaro Rodríguez, Maria Mercedes; García Gómez, Hermenegildo (Elsevier, 2012)

[EN] Iron metal organic framework [Fe(BTC)) loaded with N-hydroxyphthalimide (NHPI) promotes the aerobic oxidation of (cyclo)alkenes to give variable percentages of allylic oxidation products and the corresponding epoxide, ...
Au@MOF-5 and Au/MOx@MOF-5 (M = Zn, Ti; x = 1, 2): Preparation and Microstructural Characterisation

Müller, Maike; Stuart, Turner; Lebedev, Oleg, I.; Wang, Yuemin; Van Tendeloo, Gustaaf; Fischer, Roland A. (Wiley-VCH Verlag, 2011)

[EN] The Zn-carboxylate-based porous coordination polymer MOF-5 [Zn4O(bdc)(3)] and the metal oxide loaded materials ZnO@MOF-5 and TiO2@MOF-5 were loaded in a second step with the precursor [ClAuCO] to yield intermediate ...
Bioethanol steam reforming on Ni-based modified mordenite. Effect of mesoporosity, acid sites and alkaline metals

Da Costa Serra, Javier Francisco; Navarro Ruiz, María Teresa; Rey Garcia, Fernando; Chica, Antonio (Elsevier, 2012-04)

Support plays an important role in the preparation of highly active and selective bioethanol steam reforming catalysts since it helps in the dispersion of metal particles and enhances its activity via metal-support ...
Carbon materials with tailores porosity by self-assembly method:Influence of the synthesis conditions

Zubizarreta Saenz de Zaitegui, Leire; Iserte Nebot, María Rosa; Llovera Segovia, Pedro; Gil Agustí, María Teresa (Elsevier, 2011)

A series of different carbon materials have been obtained by self-assembly method under different conditions in order to study the effect of the nature of carbon precursor, pore forming agent and catalyst concentration on ...
Catalysts and catalytic processes for the transformation of tars and other non-conventional feedstocks into fuels and chemicals

Raad, Zaher (Universitat Politècnica de València, 2021-12-03)

[ES] Debido al agotamiento de las fuentes de petróleo, la mayor demanda de energía y combustibles para el transporte, y la necesidad de reducir las emisiones de gases de efecto invernadero y la dependencia de los recursos ...
Competitive ultrafast electron and proton transfer reactions within titania and silica mesoporous materials

Gil, Michael; Organero, Juan Angel; Navarro Ruiz, María Teresa; Corma Canós, Avelino; Douhal, Abderrazzak (American Chemical Society, 2012-07-26)

[EN] We report on UV-visible absorption and emission and ultrafast emission dynamics of 7-hydroxyquinoline (7HQ) encapsulated within titania-doped silicates (mesoporous and unstructured) and purely TiO2 nanomaterials. When ...
Control de las propiedades ácidas de las zeolitas MFI y RTH sintetizadas con agentes directores de estructura fosforados

Fernandez Vazquez, Alicia (Universitat Politècnica de València, 2021-01-28)

[ES] Las zeolitas son sólidos cristalinos microporosos, generalmente aluminosilicatos, que se utilizan ampliamente como catalizadores para llevar a cabo diferentes reacciones de interés industrial. Uno de los principales ...
CuNi/Al hydrotalcites synthesized in presence of microwave irradiation

Ayala, Abraham; Fetter, Geolar; Palomares Gimeno, Antonio Eduardo; Bosch, Pedro (Elsevier, 2011)

[EN] To enhance the electronic properties of nanoparticles, functional clusters are usually supported on metal oxides as alumina. Copper and nickel clusters supported on magnesia or alumina are promising materials to ...
Diastereoisomeric enrichment of 1,4-enediols and H-2-splitting inhibition on Pd-supported catalysts

Leyva Perez, Antonio; Ballesteros-Soberanas, Jordi; Mon-Conejero, Marta (The Royal Society of Chemistry, 2023-09-13)

[EN] Pd-supported catalysts are fundamental tools in organic reactions involving H-2 splitting. Here we show that 1,4-enediols enriched in one diastereoisomer are produced from the classical Pd-catalyzed semi-hydrogenation ...
Effect of Framework Composition and NH3 on the Diffusion of Cu+ in Cu-CHA Catalysts Predicted by Machine-Learning Accelerated Molecular Dynamics

Millán-Cabrera, Reisel; Bello-Jurado, Estefanía; Moliner Marin, Manuel; Boronat Zaragoza, Mercedes; Gomez-Bombarelli, Rafael (American Chemical Society, 2023-10-18)

[EN] Cu-exchanged zeolites rely on mobile solvated Cu+ cations for their catalytic activity, but the role of the framework composition in transport is not fully understood. Ab initio molecular dynamics simulations can ...
Estudio de la hidrogenación quimioselectiva de ésteres de ácidos grasos a alcoholes grasos mediante catalizadores metálicos soportados

Quintero Ramos, Diego (Universitat Politècnica de València, 2021-12-29)

[ES] Los alcoholes grasos o alcoholes de cadena larga suelen ser compuestos de elevado peso molecular y de cadena lineal con un número de átomos de carbono comprendido entre 6 y 26 átomos, dependiendo de la materia prima ...
Exploring the Mechanisms and Kinetic Modeling of Phenol Amination Using Pd and Rh-Based Catalysts

Ortega, Maray; Garrido, Benjamin; Gómez-Acosta, Daviel; Fernandez-Andrade, Alex Ariel; Domine, Marcelo Eduardo; Jiménez, Romel; Arteaga-Pérez, Luis E (John Wiley & Sons, 2024-09-30)

[EN] Producing biomass-derived chemicals to substitute their petrochemical counterparts has long been an aspiration of the green chemistry research community. However, synthesizing secondary amines from biomass precursors ...
FIB-SEM tomography in catalysis and electrochemistry

Ródenas Torralba, Tania; Prieto González, Gonzalo (Elsevier, 2022-12-01)

[EN] Tomographic imaging methods have been incorporated, mostly from other scientific disciplines, into catalysis research. They are invaluable tools for the structural diagnostics of solid catalyst and electrode materials, ...
Heterogeneous Fenton Catalysts Based on Activated Carbon and Related Materials

Navalón Oltra, Sergio; Dhakshinamoorthy, Amarajothi; Alvaro Rodríguez, Maria Mercedes; García Gómez, Hermenegildo (Wiley-Blackwell, 2011)

[EN] The Fenton reaction is widely used for remediation of waste water and for the degradation of organic pollutants in water. Currently, there is considerable interest to convert the classical Fenton reaction, which ...
High-current water electrolysis performance of metal phosphides grafted on porous 3D N-doped graphene prepared without using phosphine

Hu, Hu Jiajun; Peng, Lu; Primo Arnau, Ana Maria; Albero-Sancho, Josep; García Gómez, Hermenegildo (Elsevier, 2022-05-18)

[EN] Development of efficient and stable electrodes for hydrogen and oxygen evolution from water constituted of abundant elements and prepared by sustainable and scalable procedures is of considerable importance for producing ...
Hydrothermal Synthesis of Ruthenium Nanoparticles with a Metallic Core and a Ruthenium Carbide Shell for Low-Temperature Activation of CO2 to Methane

Cored-Bandrés, Jorge; Garcia-Ortiz, Andrea; Iborra Chornet, Sara; Climent Olmedo, María José; Liu, Lichen; Chuang, Cheng-Hao; Chan, Ting-Shan; Escudero, Carlos; Concepción Heydorn, Patricia; Corma Canós, Avelino (American Chemical Society, 2019-12-11)

[EN] Ruthenium nanoparticles with a core-shell structure formed by a core of metallic ruthenium and a shell of ruthenium carbide have been synthesized by a mild and easy hydrothermal treatment. The dual structure and ...
Influence of Excitation Wavelength (UV or Visible Light) on the Photocatalytic Activity of Titania Containing Gold Nanoparticles for the Generation of Hydrogen or Oxygen from Water

Gomes Silva, Claudia; Juárez Marín, Raquel; Marino, Tiziana; Molinari, Raffaele; García Gómez, Hermenegildo (American Chemical Society, 2011)

: Gold nanoparticles supported on P25 titania (Au/TiO2) exhibit photocatalytic activity for UV and visible light (532 nm laser or polychromatic light ¿ > 400 nm) water splitting. The ef¿ciency and operating mechanism are ...
Influence of the irradiation wavelength on the photocatalytic activity of Au-Pt nanoalloys supported on TiO2 for hydrogen generation from water

Montes Navajas, Pedro Manuel; Serra, Marco; García Gómez, Hermenegildo (Royal Society of Chemistry, 2013)

[EN] Seven samples of P25 titania containing Au Pt nanoalloys at constant total metal loading (0.25% wt),very similar particle size (1.5 nm) and different proportions of Pt (0.0, 22.8, 27.8, 35.0, 50.0, 69.0 and 100.0% wt) ...
Influence of Zeolite Surface in the Sorption of Methane from Molecular Dynamics

Combariza Montañez, Aldo Fabrizzio; Sastre Navarro, German Ignacio (2011-06-23)

We report results of molecular dynamics simulations on the transient and equilibrium surface adsorption of methane in a model Si-LTA zeolite structure with explicit silanol terminal groups. Using probability occupancy ...