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Aproximadamente 29 registro(s) hasta el momento: (journal)

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Recurso libre

Effect of the intercalated cation on the properties of poly(o-methylaniline)/maghnite clay nanocomposites
Salavagione, Horacio Javier - Cazorla Amorós, Diego - Tidjane, Selma - Belbachir, Mohammed - Benyoucef, Abdelghani - Morallón Núñez, Emilia

Formato:	info:eu-repo/semantics/article
Enlaces:	A detailed study about the synthesis, characterization and properties of poly(o-methylaniline)(PoMea)/maghnite nanocomposites has been performed. Changes in the characteristics of the nanocomposites, depending on the intercalated cation between the clay layers before the synthesis, have been observed. Intercalated morphology has…
Fecha:	2008-09-30
Recurso:	RUA Docencia

Recurso libre

The effects of manifold flow on mass transport in electrochemical filter-press reactors
Frías Ferrer, Ángel - González García, José - Sáez Bernal, Verónica - Ponce de León Albarrán, Carlos - Walsh, Frank C.

Formato:	info:eu-repo/semantics/article
Enlaces:	The mass transport rates to planar electrodes, in a series of electrochemical laboratory filter-press reactors were measured to quantify the effects of the inlet and outlet design manifolds on the fluid flow. In small reactors, entrance/exit effects are especially important…
Fecha:	2008-11-05
Recurso:	RUA Docencia

Recurso libre

Electrochemical reduction of perchloroethylene in aqueous media: influence of the electrode material
Sáez Bernal, Verónica - Esclapez Vicente, María Deseada - Frías Ferrer, Ángel - Bonete Ferrández, Pedro - González García, José

Formato:	info:eu-repo/semantics/article
Enlaces:	The electrochemical reduction of perchloroethylene (PCE) in water has been analyzed through voltammetric studies with a rotating disc electrode and controlled potential bulk electrolysis. The influence of the mass transport conditions and initial concentration on lead, copper and carbon electrodes…
Fecha:	2009-02-05
Recurso:	RUA Docencia

Recurso libre

Characterization and stability of doped SnO2 anodes
Vicent Velasco, Francisco - Morallón Núñez, Emilia - Quijada Tomás, César - Vázquez Picó, José Luis - Aldaz Riera, Antonio - Cases Iborra, Francisco Javier

Formato:	info:eu-repo/semantics/article
Enlaces:	Doped tin dioxide electrodes have been prepared by a standard spray pyrolysis technique. The electrochemical behaviour of these electrodes has been investigated by cyclic voltammetry in sulphuric acid using the Fe2+/Fe3+ redox couple system as test reaction. Oxygen evolution has…
Fecha:	2008-08-04
Recurso:	RUA Docencia

Recurso libre

Kinetics of electrocrystallization of PbO2 on glassy carbon electrodes: influence of ultrasound
González García, José - Gallud Martínez, Francisco - Iniesta Valcárcel, Jesús - Montiel Leguey, Vicente - Aldaz Riera, Antonio - Lasia, Andrzej

Formato:	info:eu-repo/semantics/article
Enlaces:	Electrocrystallisation of lead dioxide on glassy carbon electrodes was studied in 1 M HNO3+ 0.1 M Pb(NO3)2 in the presence of ultrasound using chronoamperometry and scanning electron microscopy. In order to compare these results with those obtained in the absence…
Fecha:	2008-11-05
Recurso:	RUA Docencia

Recurso libre

Redox flow cells for energy conversion
Ponce de León Albarrán, Carlos - Frías Ferrer, Ángel - González García, José - Szánto, D.A. - Walsh, Frank C.

Formato:	info:eu-repo/semantics/article
Enlaces:	Energy storage technologies provide an alternative solution to the problem of balancing power generation and power consumption. Redox flow cells are designed to convert and store electrical energy into chemical energy and release it in a controlled fashion when required.…
Fecha:	2008-11-06
Recurso:	RUA Docencia

Recurso libre

Pt/carbon nanofibers electrocatalysts for fuel cells: effect of the support oxidizing treatment
Zaragoza Martín, Francisco - Sopeña Escario, Daniel - Morallón Núñez, Emilia - Salinas Martínez de Lecea, Concepción

Formato:	info:eu-repo/semantics/article
Enlaces:	Different Pt-based electrocatalysts supported on carbon nanofibers and carbon black (Vulcan XC-72R) have been prepared using a polymermediated synthesis. The electrocatalysts have been characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and cyclic voltammetry. The effect of carbon nanofibers…
Fecha:	2008-09-22
Recurso:	RUA Docencia

Recurso libre

Voltammetric and in situ FTIRS study on CN- and Au(CN)-x complexes at the polycrystalline gold surface in citrate medium
Huerta Arráez, Francisco - Mele, Claudio - Bozzini, Benedetto - Morallón Núñez, Emilia

Formato:	info:eu-repo/semantics/article
Enlaces:	The adsorption and reactivity of citrate anions, cyanide anions, and the Au(I) and Au(III) cyanocomplexes (KAu(CN)2 and KAu(CN)4, respectively) on gold polycrystalline electrodes have been investigated by means of cyclic voltammetry and in situ FTIR spectroscopy in pH 7 sodium…
Fecha:	2008-09-25
Recurso:	RUA Docencia

Recurso libre

Spectroelectrochemical study of the oxidation of aminophenols on platinum electrode in acid medium
Salavagione, Horacio Javier - Arias Pardilla, Joaquín - Garcés Terradillos, Pedro - Morallón Núñez, Emilia - Barbero, César Alfredo - Vázquez Picó, José Luis

Formato:	info:eu-repo/semantics/article
Enlaces:	The electrochemical oxidation of para-, meta- and ortho-aminophenols was carried out using a platinum electrode in aqueous acid medium. The spectroscopic results indicate that p-aminophenol suﬀers hydrolysis giving the formation of hydroquinone/p-benzoquinone. CO2 has been detected by in situ FTIR…
Fecha:	2008-09-25
Recurso:	RUA Docencia

Recurso libre

10.

Conducting films obtained by electro-oxidation of p-aminodiphenylamine (ADPA) in the presence of aniline in buffer aqueous solution at pH 5
Cases Iborra, Francisco Javier - Huerta Arráez, Francisco - Lapuente Aragó, Rocío - Quijada Tomás, César - Morallón Núñez, Emilia - Vázquez Picó, José Luis

Formato:	info:eu-repo/semantics/article
Enlaces:	The electrochemical oxidation of aniline and p-aminodiphenylamine (ADPA) was carried out in a phosphate buffer solution at pH 5. Cyclic voltammetry and ‘‘in situ’’ FTIR spectroscopy were combined to study the redox behavior of the oxidation products. When ADPA is…
Fecha:	2008-09-25
Recurso:	RUA Docencia

Recurso libre

11.

Voltammetric and in situ FTIRS study of the electrochemical oxidation of aniline from aqueous solutions buffered at pH 5
Cases Iborra, Francisco Javier - Huerta Arráez, Francisco - Garcés Terradillos, Pedro - Morallón Núñez, Emilia - Vázquez Picó, José Luis

Formato:	info:eu-repo/semantics/article
Enlaces:	The electrochemical oxidation of aniline at low concentration was carried out in phosphate buffer solutions of pH 5. Both electrochemical and spectroscopic results indicate that during the initial stages of aniline oxidation, a dimerisation process takes place. The dimer has…
Fecha:	2008-09-25
Recurso:	RUA Docencia

Recurso libre

12.

Electrochemical behaviour of amino acids on Pt(hkl): a voltammetric and in situ FTIR study. Part IV. Serine and alanine on Pt(100) and Pt(110)
Huerta Arráez, Francisco - Morallón Núñez, Emilia - Vázquez Picó, José Luis - Aldaz Riera, Antonio

Formato:	info:eu-repo/semantics/article
Enlaces:	The electrochemical oxidation of serine and alanine was performed at Pt(100) and Pt(110) electrodes and analysed by means of FTIR spectroscopy and cyclic voltammetry. The open circuit adsorption of both amino acids was also investigated. The oxidation of serine gives…
Fecha:	2008-09-25
Recurso:	RUA Docencia

Recurso libre

13.

Oxidation of methylamine and ethylamine on Pt single crystal electrodes in acid medium
Huerta Arráez, Francisco - Morallón Núñez, Emilia - Pérez Martínez, Juan Manuel - Vázquez Picó, José Luis - Aldaz Riera, Antonio

Formato:	info:eu-repo/semantics/article
Enlaces:	Cyclic voltammetry (CV) and Fourier transform infrared reflection-absorption spectroscopy (FT-IRRAS) have been combined to analyse the oxidation of methylamine and ethylamine on platinum single crystal electrodes in an acidic medium. The oxidation of both amines on Pt(hkl) electrodes gives rise…
Fecha:	2008-09-25
Recurso:	RUA Docencia

Recurso libre

14.

The adsorption of methylamine on Pt single crystal surfaces
Huerta Arráez, Francisco - Morallón Núñez, Emilia - Quijada Tomás, César - Vázquez Picó, José Luis - Pérez Martínez, Juan Manuel - Aldaz Riera, Antonio

Formato:	info:eu-repo/semantics/article
Enlaces:	The irreversible adsorption of methylamine at platinum single-crystal electrodes has been studied by a combination of electrochemical and in situ spectroscopic techniques. From purely electrochemical data, it has been stated that the adsorption of CH3NH2 molecules results in significant alteration…
Fecha:	2008-09-25
Recurso:	RUA Docencia

Recurso libre

15.

Potential modulated reflectance spectroscopy of Pt(111) in acidic and alkaline media: cyanide adsorption
Huerta Arráez, Francisco - Morallón Núñez, Emilia - Quijada Tomás, César - Vázquez Picó, José Luis - Berlouis, L.E.A.

Formato:	info:eu-repo/semantics/article
Enlaces:	The electroreflectance (ER) technique has been applied to the study of a Pt(111) electrode in different acidic and alkaline electrolytes. The variation in the normalised potential derivative of the reflectance signal, 1/R(dR/dE) is observed in sulphuric and perchloric acid media…
Fecha:	2008-09-25
Recurso:	RUA Docencia

Recurso libre

16.

A voltammetric and FTIR–ATR study of the electropolymerization of phenol on platinum electrodes in carbonate medium Influence of sulfide
Lapuente Aragó, Rocío - Cases Iborra, Francisco Javier - Garcés Terradillos, Pedro - Morallón Núñez, Emilia - Vázquez Picó, José Luis

Formato:	info:eu-repo/semantics/article
Enlaces:	Voltammetry and FTIR–ATR techniques have been employed to investigate polyphenol films formed on platinum surfaces by electrochemical oxidation of phenol. The media used in the electropolymerization were aqueous carbonate solutions, with and without Na2S. The polymeric films created are not…
Fecha:	2008-09-25
Recurso:	RUA Docencia

Recurso libre

17.

Electrochemical behaviour of amino acids on Pt(h,k,l): a voltammetric and in situ FTIR study. Part 1. Glycine on Pt(111)
Huerta Arráez, Francisco - Morallón Núñez, Emilia - Cases Iborra, Francisco Javier - Rodes García, Antonio - Vázquez Picó, José Luis - Aldaz Riera, Antonio

Formato:	info:eu-repo/semantics/article
Enlaces:	A spectroelectrochemical study of the adsorption and oxidation of glycine on a Pt(111) electrode has been carried out in 0.1 M HClO4 solution. Two types of adsorbate were identified. On the one hand, strongly adsorbed cyanide which comes from the…
Fecha:	2008-09-25
Recurso:	RUA Docencia

Recurso libre

18.

Characterization of a carbon felt electrode: structural and physical properties
González García, José - Bonete Ferrández, Pedro - Expósito Rodríguez, Eduardo - Montiel Leguey, Vicente - Aldaz Riera, Antonio - Torregrosa Maciá, Rosa

Formato:	info:eu-repo/semantics/article
Enlaces:	The aim of this paper is the characterization of a carbon felt (Le Carbone Lorraine, RVC 4002) to be used as three-dimensional electrode. A wide group of very different techniques were used in the physical and structural characterization of this…
Fecha:	2008-11-03
Recurso:	RUA Docencia

Recurso libre

19.

Recovery by means of electrodialysis of an aromatic amino acid from a solution with a high concentration of sulphates and phosphates
Montiel Leguey, Vicente - García García, Vicente - González García, José - Carmona, F. - Aldaz Riera, Antonio

Formato:	info:eu-repo/semantics/article
Enlaces:	In the industrial obtention of D-a-p-hydroxyphenylglycine the separation of the amino acid is carried out by precipitation and during this process, a mother liquor is produced with a high salt content (phosphates and sulphates) and an amino acid concentration of…
Fecha:	2008-11-04
Recurso:	RUA Docencia

Recurso libre

20.

Kinetics of electrocrystallization of PbO2 on glassy carbon electrodes: partial inhibition of the progressive three-dimensional nucleation and growth
González García, José - Gallud Martínez, Francisco - Iniesta Valcárcel, Jesús - Montiel Leguey, Vicente - Aldaz Riera, Antonio - Lasia, Andrzej

Formato:	info:eu-repo/semantics/article
Enlaces:	Electrocrystallization of PbO2 on glassy carbon electrodes was studied in 1 M HNO3 + 0.1 M Pb(NO3)2 using cyclic voltammetry rotating disk electrode experiments, chronoamperometry, and scanning electron microscopy. In order to explain the experimental curves, a new theory of…
Fecha:	2008-11-05
Recurso:	RUA Docencia

Recurso libre

21.

Effects of ultrasound on the electrodeposition of lead dioxide on glassy carbon electrodes
González García, José - Iniesta Valcárcel, Jesús - Aldaz Riera, Antonio - Montiel Leguey, Vicente

Formato:	info:eu-repo/semantics/article
Enlaces:	The electrodeposition of lead dioxide from lead(II) nitrate in an acid medium has been used as a test reaction to study the effects of an ultrasound field. The different behaviours found between platinum and glassy carbon electrodes have been compared…
Fecha:	2008-11-04
Recurso:	RUA Docencia

Recurso libre

22.

Electrochemical behaviour of amino acids on Pt(hkl): a voltammetric and in situ FTIR study. Part III. Glycine on Pt(100) and Pt(110)
Huerta Arráez, Francisco - Morallón Núñez, Emilia - Vázquez Picó, José Luis - Pérez Martínez, Juan Manuel - Aldaz Riera, Antonio

Formato:	info:eu-repo/semantics/article
Enlaces:	The electrochemical behaviour of glycine on well-defined Pt(100) and Pt(110) electrodes has been studied in an acid medium by means of cyclic voltammetry and in situ FTIR spectroscopy. The results presented in this paper and those reported previously for the…
Fecha:	2008-09-25
Recurso:	RUA Docencia

Recurso libre

23.

Electrochemical behaviour of amino acids on Pt(h, k, l): a voltammetric and in situ FTIR study. Part II. Serine and alanine on Pt(111)
Huerta Arráez, Francisco - Morallón Núñez, Emilia - Cases Iborra, Francisco Javier - Rodes García, Antonio - Vázquez Picó, José Luis - Aldaz Riera, Antonio

Formato:	info:eu-repo/semantics/article
Enlaces:	A spectroelectrochemical study of the adsorption and oxidation of serine and alanine on Pt(111) electrodes has been carried out in 0.1 M HClO4 solutions. From the voltammetric and FTIR spectroscopic results, we concluded that adsorbed cyanide is formed at the…
Fecha:	2008-09-25
Recurso:	RUA Docencia

Recurso libre

24.

Cyanide and phenol oxidation on nanostructured Co3O4 electrodes prepared by different methods
Berenguer Betrián, Raúl - Valdés-Solís Iglesias, Teresa - Fuertes Arias, Antonio Benito - Quijada Tomás, César - Morallón Núñez, Emilia

Formato:	info:eu-repo/semantics/article
Enlaces:	Nanostructured cobalt oxide (Co3O4) electrodes were prepared by two different methods. The first one involved the synthesis of Co3O4 nanoparticles through a nanocasting route using commercial silica gel as a sacrificial template, and in the second one, the Co3O4 electrodes…
Fecha:	2009-04-28
Recurso:	RUA Docencia

Recurso libre

25.

Electrochemical methods to enhance the capacitance in activated carbon/polyaniline composites
Bleda Martínez, María Jesús - Peng, Chuang - Zhang, Shenguen - Chen, George Z. - Morallón Núñez, Emilia - Cazorla Amorós, Diego

Formato:	info:eu-repo/semantics/article
Enlaces:	Activated carbon/polyaniline composites have been prepared using different electrochemical methods: single-step potentiostatic polymerization, multiple-step potentiostatic polymerization, and potentiodynamic polymerization with the anodic potential limits being fixed at either 0.75 or 1 V (vs Ag/AgCl). The prepared composite samples were characterized…
Fecha:	2009-05-19
Recurso:	RUA Docencia

Recurso libre

26.

Ferrocenium strong adsorption on sulfonated polyaniline modified electrodes
Sanchis Bermúdez, Carlos - Salavagione, Horacio Javier - Morallón Núñez, Emilia

Formato:	info:eu-repo/semantics/article
Enlaces:	The electrocatalytic oxidation of ferrocene (Fc) at neutral pH in aqueous solution has been studied over thin films of electroactive sulfonated polyaniline (SPAN) by cyclic voltammetry. Strong adsorption of the oxidised species (ferrocenium ion) on the polymer arises as the…
Fecha:	2009-05-19
Recurso:	RUA Docencia

Recurso libre

27.

Electrochemical deposition of platinum nanoparticles on different carbon supports and conducting polymers
Domínguez Domínguez, Sonia - Arias Pardilla, Joaquín - Berenguer Murcia, Ángel - Morallón Núñez, Emilia - Cazorla Amorós, Diego

Formato:	info:eu-repo/semantics/article
Enlaces:	Electrodeposition of Pt nanoparticles under potentiostatic conditions was performed on several types of carbon electrode supports: commercial macroporous carbon (a three-dimensional electrode), glassy carbon and graphite. Conducting polymers (poly-aniline and poly-oaminophenol) were also used. The platinum nanoparticles were obtained by…
Fecha:	2009-04-28
Recurso:	RUA Docencia

Recurso libre

28.

Hybrid sol-gel conducting polymer synthetised by electrochemical insertion: tailoring the capacitance of polyaniline
Montilla Jiménez, Francisco - Cotarelo Méndez, María de los Ángeles - Morallón Núñez, Emilia

Formato:	info:eu-repo/semantics/article
Enlaces:	The templated growth of polyaniline through porous sol–gel films on ITO substrates has been performed. The polyaniline–silica composites have been synthesized by electrochemical reactive insertion in potentiodynamic and potentiostatic conditions. When the polymer is synthesized by potential step experiments, the…
Fecha:	2009-05-19
Recurso:	RUA Docencia

Recurso libre

29.

Voltammetric and in situ FTIRS study of the electropolymerization of o-aminobenzoic acid at gold and graphite carbon electrodes: influence of pH on the electrochemical behaviour of polymer films
Benyoucef, Abdelghani - Huerta Arráez, Francisco - Ferrahi, Mohammed Issam - Morallón Núñez, Emilia

Formato:	info:eu-repo/semantics/article
Enlaces:	The electrochemical homopolymerization of o-aminobenzoic acid has been performed on both gold and graphite surfaces in perchloric acid aqueous medium by cyclic scanning of the potential. Electroactive polymeric materials are formed in all cases but the amount of electropolymerization products…
Fecha:	2009-05-19
Recurso:	RUA Docencia