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Browsing by Subject "Nickel"

Now showing items 1-20 of 25

A new selective fluorogenic probe for trivalent cations

Barba Bon, Andrea; Costero, Ana; Gil Grau, Salvador; Parra Álvarez, Margarita; Soto Camino, Juan; Martínez Mañez, Ramón; Sancenón Galarza, Félix (Royal Society of Chemistry, 2012)

[EN] A new selective chromo-fluorogenic probe for Fe 3+, Cr 3+ and Al 3+ is reported. Detection limits are in the ¿M range and the fluorogenic sensing ability could be observed by the naked eye when illuminated with UV-light. ...
A Square-Planar Dinickel(II) Complex with a Noninnocent Dinucleating Oxamate Ligand: Evidence for a Ligand Radical Species

Aukauloo, A.; Ottenwaelder, X.; Ruiz, R.; Poussereau, S.; Pei, Y.; Journaux, Y.; Fleurat, P.; Volatron, F.; Cervera, B.; Muñoz Roca, María Del Carmen (John Wiley & Sons, 1999-06-17)

[EN] The new bimetallic nickel(II) compound (PPh4)4[Ni2(2)]·6H2O (3), where H8[2] stands for N,N',N'',N'''-1,2,4,5-benzene-tetrayltetrakis(oxamic acid), has been synthesized and its crystal structure determined by ...
Catalizadores de Níquel basados en Sepiolita natural aplicados al reformado con vapor de Bioetanol

López Gil, Eva (Universitat Politècnica de València, 2013-06-17)

[ES] Preparación de catalizadores en la producción de hidrógeno a partir de bioetanol utilizando catalizadores de níquel soportados sobre sepiolita natural
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 ...
Design of improved hydrocracking catalysts by increasing the proximity between acid and metallic sites

Francis, J.; Guillon, E.; Bats, Nicolas; Pichon, C.; Corma Canós, Avelino; Simon, L.J. (Elsevier, 2011-12-15)

A new approach was undertaken to increase the bifunctionality of USY zeolite based catalyst. Nickel metallic phase was first impregnated onto USY zeolite and composite catalysts NiMo/[γ-Al2O3 + (Ni)/USY] were prepared from ...
Determination of transport properties of Ni(II) through a Nafion cation-exchange membrane in chromic acid solutions

Martí Calatayud, Manuel César; García Gabaldón, Montserrat; Pérez-Herranz, Valentín; Ortega Navarro, Emma María (Elsevier, 2011-07-07)

The transport properties of a cation-exchange membrane in the presence of nickel sulphate solutions were investigated by means of chronopotentiometry. The interest of this study relies on the application to the treatment ...
Double-template fabrication of three-dimensional porous nickel electrodes for hydrogen evolution reaction

Herraiz-Cardona, Isaac; Ortega Navarro, Emma María; Vázquez-Gómez, Lourdes; Pérez-Herranz, Valentín (PERGAMON-ELSEVIER SCIENCE LTD, 2012-02)

[EN] Three-dimensional (3D) porous nickel structures were fabricated via a double-template electrochemical deposition process. The construction of the foam structures was achieved by means of a hydrogen bubble dynamic ...
El fango activado como adsorbente de cobre, níquel y cianuro

Castro Rubio, Estefanía; Lloret Salinas, Sergio; Aguado García, Daniel; Barat, Ramón (Infoedita, 2019-10)

[EN] Conventional wastewater treatment plants (WWTP) used to get an insufficient removal of pollutants such as copper, nickel and cyanide, which can affect the aquatic media quality that receiving the final effluent. In ...
Enhanced NiO Dispersion on a High Surface Area Pillared Heterostructure Covered by Niobium Leads to Optimal Behaviour in the Oxidative Dehydrogenation of Ethane

Rodríguez-Castellón, Enrique; Delgado-Muñoz, Daniel; Dejoz, Ana; Vázquez, Isabel; Agouram, Said; Cecilia, Juan A.; Solsona, Benjamín; López Nieto, José Manuel (John Wiley & Sons, 2020-07-27)

[EN] A Nb-containing siliceous porous clay heterostructure (PCH) with Nb contents from 0 to 30 wt %) was prepared from a bentonite and used as support in the preparation of supported NiO catalysts with NiO loading from 15 ...
Furfural steam reforming over Ni-based catalysts. Influence of Ni incorporation method

Sayas Valero, Salvador; Chica, Antonio (Elsevier, 2014-03-26)

Catalytic steam reforming of biomass-derived compounds as furfural could be a promising option to produce renewable hydrogen; however efficient catalysts are still under study. Different commercial supports (SiO2, Al2O3, ...
Influence of Temperature on the Corrosion Behaviour and on the Hydrogen Evolution Reaction on Nickel and Stainless Steels in LiBr Solutions

Guiñón Pina, Virginia; Igual Muñoz, Anna Neus; García Antón, José (Electrochemical Science Group, 2011)

[EN] The effects of temperature and hydrogen generation on the passive behaviour of nickel, austenitic and duplex stainless steels are investigated in lithium bromide aqueous solution (992 g/l) by Open Circuit Potential ...
Mixed Proton-Electron Conducting Chromite Electrocatalysts as Anode Materials for LWO-Based Solid Oxide Fuel Cells

Solis Díaz, Cecilia; Vert Belenguer, Vicente Bernardo; Balaguer Ramírez, María; Escolástico Rozalén, Sonia; Roitsch, Stefan; Serra Alfaro, José Manuel (Wiley-VCH Verlag, 2012-11)

[EN] Chromite anodes in LWO PC-SOFC: Chemically compatible LSCN/LWO symmetric cells show the high protonic conductivity and p-type electronic conductivity of LSCN in reducing atmospheres. This allows to avoid blending with ...
New Catalysts based on Ni-Birnessite and Ni-Todorokite for the Efficient Production of Hydrogen by Bioethanol Steam Reforming

Fuertes, A.; Da Costa Serra, Javier Francisco; Chica, Antonio (Elsevier, 2012)

Catalytic steam reforming of bioethanol seems to be a promise option to produce renewable hydrogen; however efficient catalysts are still under development. Recently, manganese oxide based materials (MO) are the subject ...
Nickel exsolution driven phase transformation from an n=2 to an n=1 Ruddlesden Popper manganite for methane steam reforming reaction in SOFC conditions

Vecino-Mantilla, Sebastián; Gauthier-Maradei, Paola; Huvé, Marielle; Serra Alfaro, José Manuel; Roussel, Pascal; Gauthier, Gilles H. (John Wiley & Sons, 2019-09-19)

[EN] An original way to perform the exsolution of Ni nanoparticles on a ceramic support was explored for the development of methane steam reforming catalyst in SOFC anode conditions. The n=2 Ruddlesden-Popper (RP) phase ...
Nickel exsolution effect on the catalytic behavior of ruddlesden-popper manganites in sofc conditions using colombian natural gas

Vecino Mantilla, Juan Sebastián (Universitat Politècnica de València, 2020-09-02)

[EN] Several major problems have to be solved before Solid Oxide Fuel Cells (SOFC) can operate continuously using hydrocarbon fuels such as natural gas. The risk of low catalytic behavior for fuel reforming, the carbon ...
Oligomerización de Etileno sobre catalizadores heterogéneos Ni-BETA. Estudio cinético preliminar

Moussa Martí, Sara (Universitat Politècnica de València, 2013-06-17)

[ES] En este trabajo se muestra el catalizador NI-Beta como activo y estable en la ollgomerización heterogénea de etileno. No todas las especies de Ni ocupando posiciones de intercambio resultaron Igualmente activas. Se ...
Particular Transport Properties of NiFe2O4 Thin Films at High Temperatures

Solis Díaz, Cecilia; Somacescu, Simona; Palafox, E.; Balaguer Ramírez, María; Serra Alfaro, José Manuel (American Chemical Society, 2014-10-23)

NiFe2O4 (NFO) thin films were deposited on quartz substrates by rf magnetron sputtering, and the influence of the deposition conditions on their physic-chemical properties was studied. The films structure and the high ...
Producción sostenible de gas de síntesis a partir de glicerina utilizando catalizadores basados en níquel soportado sobre sepiolita

Menor Valls, María (Universitat Politècnica de València, 2015-10-19)

[ES] El aumento de la producción de biodiesel lleva consigo un aumento en la producción de glicerina, su subproducto mayoritario. Esta situación hace que se disponga de cantidades considerables de glicerina cuya transformación ...
Quantitative colorimetric-imaging analysis of nickel in iron meteorites

Lahuerta Zamora, L.; Alemán López, P.; Antón Fos, G.M.; Martín Algarra, R.; Mellado Romero, Ana María; Martínez Calatayud, J. (Elsevier, 2011-02)

A quantitative analytical imaging approach for determining the nickel content of metallic meteorites is proposed. The approach uses a digital image of a series of standard solutions of the nickel-dimethylglyoxime coloured ...
Rational design of a new class of heterobimetallic molecule-based magnets: Synthesis, crystal structures, and magnetic properties of oxamato-bridged M 3M2 (M = LiI and MnII; M = NiII and CoII) open-frameworks with a three-dimensional honeycomb architecture

Cangussu, D.; Pardo, E.; Dul, M. C.; Lescouëzec, R.; Herson, P.; Journaux, Y.; Pedroso, E. F.; Pereira, C. L. M.; Stumpf, H. O.; Muñoz, M. C.; Ruiz-García, R.; Cano, J.; Julve, M.; Lloret, F. (Elsevier, 2008-09-01)

[EN] Two new series of oxamato-bridged heterobimetallic coordination networks of general formula Li-5[Li3M2(mpba)(3)(H2O)(6)] center dot 31H(2)O [M= Ni-II (1a) and Co-II (1b)] and Li-2[Mn3M2(mpba)(3)(H2O)(6)] center dot ...