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Browsing by Subject "Heterogeneous catalysis"

Now showing items 1-20 of 127

"One-pot" synthesis of 5-(Hydroxymethyl)furfural from carbohydrates using tin-Beta zeolite

Nikolla, Eranda; Román-Leshkov, Yuriy; Moliner Marin, Manuel; Davis, Mark E. (American Chemical Society, 2011)

[EN] Conversion of carbohydrates to 5-(hydroxymethyl)furfural (HMF) may provide a step forward toward achieving a renewable biomass-based chemicals and fuels platform. Recently, we reported that a tin-containing, high-silica ...
A heterogeneous mechanism for the catalytic decomposition of hydroperoxides and oxidation of alkanes over CeO2 nanoparticles: A combined theoretical and experimental study

López Auséns, Javier Tirso; Boronat Zaragoza, Mercedes; Concepción Heydorn, Patricia; Chouzier, Sandra; Mastroianni, Sergio; Corma Canós, Avelino (Elsevier, 2016)

[EN] A nanoparticulate CeO2 catalyst is presented that is able to oxidize cyclohexane to K/A-oil (a mixture of cyclohexanone and cyclohexanol) using hydroperoxides as oxidizing species. The improvement in selectivity with ...
A Pyridyltriazol Functionalized Zirconium Metal-Organic Framework for Selective and Highly Efficient Adsorption of Palladium

Daliran, Saba; Ghazagh-Miri, Mahbobeh; Oveisi, Ali Reza; Khajeh, Mostafa; Navalón Oltra, Sergio; Alvaro Rodríguez, Maria Mercedes; Ghaffari-Moghaddam, Mansour; Delarami, Hojat Samareh; García Gómez, Hermenegildo (American Chemical Society, 2020-06-03)

[EN] This work reports the synthesis of pyridyltriazol-functionalized UiO-66 (UiO stands for University of Oslo), namely, UiO-66-Pyta, from UiO-66-NH2 through three postsynthetic modification (PSM) steps. The good performance ...
A Rational Analysis on Key Parameters Ruling Zerovalent Iron-Based Treatment Trains: Towards the Separation of Reductive from Oxidative Phases

Sciscenko, Iván; Arqués Sanz, Antonio; Escudero-Oñate, Carlos; Roccamante, Melina; Ruiz-Delgado, Ana; Miralles-Cuevas, Sara; Malato, Sixto; Oller, Isabel (MDPI AG, 2021-11)

[EN] The development of treatment trains for pollutant degradation employing zerovalent iron has been attracting a lot of interest in the last few years. This approach consists of pre-treatment only with zerovalent iron, ...
Advances in the synthesis of titanosilicates: From the medium pore TS-1 zeolite to highly-accessible ordered materials

Moliner Marin, Manuel; Corma Canós, Avelino (Elsevier, 2014-05-01)

[EN] In the present review, we would like to cover the most fundamental advances achieved in the design of ordered titanosilicates since the earlier discovery of TS-1 reported by EniChem in the mid-eighties. The invention ...
alpha,beta-Enone Borylation by Bis(Pinacolato)Diboron Catalyzed by Cu-3(BTC)(2) Using Cesium Carbonate as a Base

Dhakshinamoorthy, Amarajothi; Alvaro Rodríguez, Maria Mercedes; Asiri, Abdullah M.; García Gómez, Hermenegildo (MDPI AG, 2021-06)

[EN] Cu-3(BTC)(2) (BTC: 1,3,5-benzenetricarboxylate) as a heterogeneous catalyst in the presence of cesium carbonate as a base is reported for the borylation of alpha,beta-conjugated enones by bis(pinacolato)diboron ...
Aqueous Phase Methanol Reforming Catalyzed by Fe-Cu Alloy Nanoparticles Wrapped on Nitrogen-Doped Graphene

García-Baldoví, Alberto; Peng, Lu; Santiago-Portillo, Andrea; Asiri, Abdullah M.; Primo Arnau, Ana Maria; García Gómez, Hermenegildo (American Chemical Society, 2022-07-25)

[EN] Small Fe-Cu nanoparticles (NPs) (about 1 nm) supported at a high loading (over 10 wt %) on N-doped graphitic carbon have been prepared in a single pyrolytic step from chitosan adsorbing Cu2+ and Fe2+ salts. The presence ...
Beyond Acid Strength in Zeolites: Soft Framework Counteranions for Stabilization of Carbocations on Zeolites and Its Implication in Organic Synthesis

Cabrero Antonino, Jose Ramón; Leyva Perez, Antonio; Corma Canós, Avelino (Wiley, 2015-05-04)

[EN] The generation of a carbocation with an acid depends not only on the acid strength but also on the ability of the counteranion to stabilize the positive charge left behind. Here we report that despite their relatively ...
Bimetallic iron-copper oxide nanoparticles supported on nanometric diamond as efficient and stable sunlight-assisted Fenton photocatalyst

Manickam-Periyaraman, Premkumar; Espinosa, Juan C.; Ferrer Ribera, Rosa Belén; Subramanian, Sivanesan; Alvaro Rodríguez, Maria Mercedes; García Gómez, Hermenegildo; Navalón Oltra, Sergio (Elsevier, 2020-08-01)

[EN] Bimetallic iron and copper oxide nanoparticles (NPs) supported on hydroxylated diamond (D3) exhibits an improved activity for the heterogeneous Fenton phenol degradation under natural or simulated sunlight irradiation ...
C-N cross-coupling on supported copper catalysts: The effect of the support, oxidation state, base and solvent

Tirsoaga Alina; Cojocaru, Bogdan; Teodorescu, Christian; Vasiliu, Florin; Grecu, Maria nicoleta; Ghica, Daniela; Parvulescu, Vasile I.; García Gómez, Hermenegildo (Elsevier, 2016)

[EN] A series of supported copper catalysts at two different loadings (1 and 2 wt%) have been prepared by deposition precipitation on various supports including TiO2, ZnO, Al2O3 and active carbon and submitted or not to ...
Carbonylation of Methanol on Metal Acid Zeolites: Evidence for a Mechanism Involving a Multisite Active Center

Blasco Lanzuela, Teresa; Boronat Zaragoza, Mercedes; Concepción Heydorn, Patricia; Corma Canós, Avelino; Law, David; Vidal Moya, José Alejandro (John Wiley & Sons, 2007)
Cascade reactions catalyzed by metal organic frameworks

Dhakshinamoorthy, Amarajothi; García Gómez, Hermenegildo (Wiley-VCH Verlag, 2014-09)

[EN] Cascade or tandem reactions where two or more individual reactions are carried out in one pot constitute a clear example of process intensification, targeting the maximization of spatial and temporal productivity with ...
Catalizadores metálicos subnanométricos altamente eficientes en reacciones de formación de enlaces C-C

Escobar Bedia, Francisco Javier (Universitat Politècnica de València, 2021-09-02)

[ES] De forma general, el trabajo realizado durante la presente tesis doctoral se ha enfocado al diseño y optimización de catalizadores heterogéneos basados en Pd y Ru soportado sobre óxidos metálicos y materiales carbonosos. ...
Catalysis at the Heart of Success!

Bornscheuer, Uwe T.; Hashmi, A. Stephen K.; García Gómez, Hermenegildo; Rowan, Michael A. (John Wiley & Sons, 2017)
Catalytic stereoselective addition to alkynes. Borylation or silylation promoted by magnesia-supported iron oxide and cis-diboronation or silaboration by supported platinum nanoparticles

Khan, Anish; Asiri, Abdullah M.; Kosa, Samia A.; García Gómez, Hermenegildo; Grirrane, Abdessamad (Elsevier, 2015-09)

Iron oxide nanoparticles supported on magnesia (FeO/MgO) have been prepared by NaBH4 reduction of Fe(SO4) on MgO and spontaneous reoxidation upon storage. XPS of FeO/MgO indicates the presence of Fe(0) (16%) and Fe(II) ...
Catalytic transformations of glycerol via hydroxyacetone into nitrogen heterocycles of industrial interest

Mazarío Santa-Pau, Jaime (Universitat Politècnica de València, 2022-01-17)

[ES] La presente tesis doctoral aborda el desarrollo de nuevos procesos catalíticos centrados en la valorización del glicerol, subproducto principal en la síntesis de biodiesel. El objetivo principal del trabajo consiste ...
Chiral NHC-Complexs with Dioxolane Backbone Heterogenized on MCM-41. Catalytic Activity

Villaverde, Gonzalo; Corma Canós, Avelino; Iglesias, Marta; Sánchez, Félix (Wiley-VCH Verlag, 2011-08-08)

[EN] Rhodium, palladium, and gold complexes of chiral (NHC)¿dioxolane¿amino ligands were prepared. Herein, new methods for the heterogenization of NHC-chiral complexes on porous silica supports are demonstrated for the ...
Cianosililación de cetonas catalizada por óxido de cerio. Estudio mecanístico

Rivero Crespo, Miguel Ángel (Universitat Politècnica de València, 2015-09-18)

[EN] Cyanosilylation of carbonylic compounds has a great interest in organic chemistry. In the present work ketones cyanosilylation is performed catalyzed by cerium oxide in mild conditions. A kinetic study was carried ...
Co-Fe Clusters Supported on N-Doped Graphitic Carbon as Highly Selective Catalysts for Reverse Water Gas Shift Reaction

Peng, Lu; Jurca, Bogdan; Primo Arnau, Ana Maria; Gordillo, Alvaro; Parvulescu, Vasile I.; García Gómez, Hermenegildo (American Chemical Society, 2021-07-19)

[EN] Graphitic carbons are suitable supports of metal nanoparticles with catalytic activity. In the present study, the preparation of N-doped graphitic carbon supporting clusters of Fe-Co alloys starting from biomass waste ...
Co-Fe Nanoparticles Wrapped on N-Doped Graphitic Carbons as Highly Selective CO2 Methanation Catalysts

Jurca, Bogdan; Peng, Lu; Primo Arnau, Ana Maria; Gordillo, Alvaro; Parvulescu, Vasile I.; García Gómez, Hermenegildo (American Chemical Society, 2021-08-11)

[EN] Pyrolysis of chitosan containing various loadings of Co and Fe renders Co-Fe alloy nanoparticles supported on N-doped graphitic carbon. Transmission electron microscopy (TEM) images show that the surface of Co-Fe NPs ...