0000000001301716
AUTHOR
José J. Calvino
showing 7 related works from this author
Selective oxidative dehydrogenation of ethane over SnO2-promoted NiO catalysts
2012
[EN] Ni-Sn-O mixed oxides catalysts have been investigated for the oxidative dehydrogenation of ethane. The catalysts were prepared through the evaporation of aqueous solutions of nickel nitrate and tin oxalate and finally calcined in air at 500 degrees C for 2 h. These materials have been characterized by several techniques (N-2-adsorption, X-ray diffraction, High-Resolution Electron Microscopy, temperature programmed reduction, X-Ray Photoelectron Spectroscopy, Fourier Transformed Infrared Spectroscopy of adsorbed CO and O-18/O-16 isotope exchange). The addition of just a tiny amount of tin highly increases the selectivity to ethylene (from ca. 40% to 80-90%). Thus, high selectivity to et…
Synthesis of Densely Packaged, Ultrasmall Pt02Clusters within a Thioether-Functionalized MOF: Catalytic Activity in Industrial Reactions at Low Tempe…
2018
The gram-scale synthesis, stabilization, and characterization of well-defined ultrasmall subnanometric catalytic clusters on solids is a challenge. The chemical synthesis and X-ray snapshots of Pt02 clusters, homogenously distributed and densely packaged within the channels of a metal-organic framework, is presented. This hybrid material catalyzes efficiently, and even more importantly from an economic and environmental viewpoint, at low temperature (25 to 140 °C), energetically costly industrial reactions in the gas phase such as HCN production, CO2 methanation, and alkene hydrogenations. These results open the way for the design of precisely defined catalytically active ultrasmall metal c…
Silver Clusters of Five Atoms as Highly Selective Antitumoral Agents Through Irreversible Oxidation of Thiols
2022
Low atomicity clusters present properties dependent on the size, due to the quantum confinement, with well-defined electronic structures and high stability. Here it is shown that Ag5 clusters catalyze the complete oxidation of sulfur to S+6. Ag5 catalytic activity increases with different oxidant species in the order O2 ≪ H2O2 < OH•. Selective oxidation of thiols on the cysteine residues of glutathione and thioredoxin is the primary mechanism human cells have to maintain redox homeostasis. Contingent upon oxidant concentration, Ag5 catalyzes the irreversible oxidation of glutathione and thioredoxin, triggering apoptosis. Modification of the intracellular environment to a more oxidized state…
Confined Pt-1(1+) Water Clusters in a MOF Catalyze the Low-Temperature Water-Gas Shift Reaction with both CO2 Oxygen Atoms Coming from Water
2018
[EN] The synthesis and reactivity of single metal atoms in a low-valence state bound to just water, rather than to organic ligands or surfaces, is a major experimental challenge. Herein, we show a gram-scale wet synthesis of Pt-1(1+) stabilized in a confined space by a crystallographically well-defined first water sphere, and with a second coordination sphere linked to a metal-organic framework (MOF) through electrostatic and H-bonding interactions. The role of the water cluster is not only isolating and stabilizing the Pt atoms, but also regulating the charge of the metal and the adsorption of reactants. This is shown for the low-temperature water-gas shift reaction (WGSR: CO + H2O CO2 + H…
CCDC 1587822: Experimental Crystal Structure Determination
2018
Related Article: Marta Mon, Miguel A. Rivero-Crespo, Jesffls Ferrando-Soria, Alejandro Vidal-Moya, Mercedes Boronat, Antonio Leyva-Pérez, Avelino Corma, Juan C. Hernandez-Garrido, Miguel Lopez-Haro, José J. Calvino, Giulio Ragazzon, Alberto Credi, Donatella Armentano, Emilio Pardo|2018|Angew.Chem.,Int.Ed.|57|6186|doi:10.1002/anie.201801957
CSD 1409698: Experimental Crystal Structure Determination
2018
Related Article: Marta Mon, Miguel A. Rivero-Crespo, Jesffls Ferrando-Soria, Alejandro Vidal-Moya, Mercedes Boronat, Antonio Leyva-Pérez, Avelino Corma, Juan C. Hernandez-Garrido, Miguel Lopez-Haro, José J. Calvino, Giulio Ragazzon, Alberto Credi, Donatella Armentano, Emilio Pardo|2018|Angew.Chem.,Int.Ed.|57|6186|doi:10.1002/anie.201801957
CCDC 1587821: Experimental Crystal Structure Determination
2018
Related Article: Marta Mon, Miguel A. Rivero-Crespo, Jesffls Ferrando-Soria, Alejandro Vidal-Moya, Mercedes Boronat, Antonio Leyva-Pérez, Avelino Corma, Juan C. Hernandez-Garrido, Miguel Lopez-Haro, José J. Calvino, Giulio Ragazzon, Alberto Credi, Donatella Armentano, Emilio Pardo|2018|Angew.Chem.,Int.Ed.|57|6186|doi:10.1002/anie.201801957