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Browsing by Subject "Platinum"

Now showing items 1-14 of 14

A Ligand-Free Pt3 Cluster Catalyzes the Markovnikov Hydrosilylation of Alkynes with up to 106 Turnover Frequencies

Rivero-Crespo, Miguel Ángel; Leyva Perez, Antonio; Corma Canós, Avelino (John Wiley & Sons, 2017)

[EN] The Pt-catalyzed hydrosilylation of alkynes is the procedure of choice to obtain vinylsilanes, and is claimed to be the most relevant application of Pt in organic synthesis. More than half a century after its discovery, ...
A method of pulse array design for voltammetric electronic tongues

Campos Sánchez, Inmaculada; Alcañiz Fillol, Miguel; Masot Peris, Rafael; Soto Camino, Juan; Martínez Mañez, Ramón; Vivancos, José-Luís; Gil Sánchez, Luís (Elsevier, 2012-01-03)

This paper proposes a reasonable methodology for the design of pulse arrays applied in classification and quantification techniques based on the use of pulse voltammetric electronic tongues. As model problem we designed a ...
A novel humid electronic nose combined with an electronic tongue for assessing deterioration of wine

Gil Sánchez, Luís; Soto Camino, Juan; Martínez Mañez, Ramón; García Breijo, Eduardo; Ibáñez Civera, Francisco Javier; Llobet Valero, Eduard (Elsevier, 2011-11)

We report herein the use of a combined system for the analysis of the spoilage of wine when in contact with air. The system consists of a potentiometric electronic tongue and a humid electronic nose. The potentiometric ...
Characterization of azo dyes on Pt and Pt/polyaniline/dispersed Pt electrodes

Molina Puerto, Javier; Fernández Sáez, Javier; Del Río García, Ana Isabel; Bonastre Cano, José Antonio; Cases Iborra, Francisco Javier (Elsevier, 2012-06-15)

The electrochemical characterization of two organic dyes (amaranth and procion orange MX-2R) has been performed on Pt electrodes and Pt electrodes coated with polyaniline and dispersed Pt. Electrodes with different Pt loads ...
Controllable synthesis of metal nanoparticles for catalytic applications

Liu, Lichen (2015-02-24)

[EN] In this thesis, I have discussed the synthesis of Cu nanoparticles and their applications in C-N coupling reactions. I find that Cu nanoparticles will decompose into Cu clusters and Cu clusters are the real active ...
Design of an electronic system and its application to electronic tongues using variable amplitude pulse voltammetry and impedance spectroscopy

Alcañiz Fillol, Miguel; Vivancos, José-Luís; Masot Peris, Rafael; Ibáñez Civera, Francisco Javier; Raga Ramón, María; Soto Camino, Juan; Martínez Mañez, Ramón (Elsevier, 2012-07)

Electronic equipment (IDM-1) especially designed for the application of voltammetric and impedometric electronic tongues is described. For impedance spectroscopy the equipment permits the generation of sinusoidal signals ...
Electrochemical treatment of a synthetic wastewater containing a sulphonated azo dye. Determination of naphthalenesulphonic compunds produced as main by-products

Del Río García, Ana Isabel; Fernández Sáez, Javier; Molina Puerto, Javier; Bonastre Cano, José Antonio; Cases Iborra, Francisco Javier (Elsevier, 2011-06-15)

The electrochemical treatment of wastewaters from textile industry is a promising technique for substances which are resistant to biodegradation. This paper deals with the electrochemical decolourisation/degradation of ...
Electron Emission of Pt: Experimental Study and Comparison With Models in the Multipactor Energy Range

Bronchalo, Enrique; Coves, Angela; Mata Sanz, Rafael; Gimeno Martinez, Benito; Montero, Isabel; Galán, Luis; Boria Esbert, Vicente Enrique; Mercadé-Morales, Laura; Sanchis Kilders, Esteban (Institute of Electrical and Electronics Engineers (IEEE), 2016-08)

Experimental data of secondary emission yield (SEY) and electron emission spectra of Pt under electron irradiation for normal incidence and primary energies lower than 1 keV are presented. Several relevant magnitudes, as ...
One-Pot Selective Catalytic Synthesis of Pyrrolidone Derivatives from Ethyl Levulinate and Nitro Compounds

Vidal, Juan D; Climent Olmedo, María José; Corma Canós, Avelino; Concepción Heydorn, Patricia; Iborra Chornet, Sara (John Wiley & Sons, 2017)

[EN] N-substituted 5-methyl-2-pyrrolidones were prepared in a one-pot process starting from ethyl levulinate and nitro compounds in the presence of a nanosized Pt-based catalyst. Pt supported on TiO2 nanotubes (Pt/TiO2-NT) ...
Similarities and Differences between the "Relativistic" Triad Gold, Platinum, and Mercury in Catalysis

Leyva Perez, Antonio; Corma Canós, Avelino (Wiley-VCH Verlag, 2012)

[EN] Relativistic effects in the valence shell of the elements reach a maximum in the triad Pt¿Au¿Hg and determine their catalytic activity in organic reactions. In this Review we examine the catalytic activity of Pt, ...
Stereoselective single (copper) or double (platinum) boronation of alkynes catalyzed by magnesia-supported copper oxide or platinum nanoparticles

Grirrane, Abdessamad; Corma Canós, Avelino; García Gómez, Hermenegildo (Wiley-VCH Verlag, 2011-02-18)

Copper(II) oxide nanoparticles supported on magnesia have been prepared from CuII supported on magnesia by hydrogen reduction at 400°C followed by storage under ambient conditions. X-ray photoelectron spectroscopy of the ...
TNT detection using a voltammetric electronic tongue based on neural networks

García Breijo, Eduardo; Olguín Pinatti, Cristian Ariel; Masot Peris, Rafael; Alcañiz Fillol, Miguel; Martínez Mañez, Ramón; Soto Camino, Juan (Elsevier, 2013-04-01)

We report here the use of a voltammetric electronic tongue based on simple metallic electrodes for the detection and discrimination of different concentrations of 2, 4, 6-trinitrotoluene (TNT) in acetonitrile: water 1:1 ...
Tuning the behavior of Au an Pt catalysts for the chemoselective hydrogenation of nitroaromatic compounds

Serna Merino, Pedro Manuel; Boronat Zaragoza, Mercedes; Corma Canós, Avelino (Springer Verlag (Germany), 2011-04)

Efficient catalysts for the synthesis of functionalized anilines from the corresponding substituted nitroaromatics should combine an excellent chemoselectivity with a high hydrogenation activity. Attempts to increase the ...
Understanding the effect of the adatoms in the formic acid oxidation mechanism on Pt(111) electrodes

Ferre Vilaplana, Adolfo; Perales Rondón, Juan Víctor; Feliu, Juan M.; Herrero, Enrique (American Chemical Society, 2015-02)

The engineered search for new catalysts requires a deep knowledge about reaction mechanisms. Here, with the support of a combination of computational and experimental results, the oxidation mechanism of formic acid on ...