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    • 03. Experiència de PFC a l'Illinois Institute Technology de la Universitat de Chicago 

      Vendrell Villafruela, Xavier (2009-02-27)
      Audiovisual
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    • 7 - Hydrogen production in microreactors 

      Soler Turu, Lluís; Jiménez Divins, Nuria; Vendrell Villafruela, Xavier; Serrano Carreño, M. Isabel; Llorca Piqué, Jordi (Elsevier, 2020-07-24)
      Capítol de llibre
      Accés restringit per política de l'editorial
      Catalytic microreactors constitute a crucial technology for process intensification in the production of hydrogen, particularly for on-site and/or onboard applications intended to feed fuel cells. This chapter describes ...

    • A straightforward method to prepare supported Au clusters by mechanochemistry and its application in photocatalysis 

      Chen, Yufen; Soler Turu, Lluís; Xie, Chenyang; Vendrell Villafruela, Xavier; Serafin, Jaroslaw; Crespo Artiaga, Daniel; Llorca Piqué, Jordi (Elsevier, 2020-12)
      Article
      Accés obert
      Reducing the metal particle size on semiconductor-based materials from a few nanometers down to well-dispersed clusters or single atoms has been demonstrated to be an effective strategy to enhance the photocatalytic ...

    • Bimetallic NiFe nanoparticles supported on CeO2 as catalysts for methane steam reforming 

      Braga, Andrea; Armengol Profitós, Marina; Pascua Solé, Laia; Vendrell Villafruela, Xavier; Soler Turu, Lluís; Serrano Carreño, M. Isabel; Villar García, Ignacio J.; Pérez Dieste, Virginia; Jiménez Divins, Nuria; Llorca Piqué, Jordi (American Chemical Society, 2023-05-12)
      Article
      Accés obert
      Ni-Fe nanocatalysts supported on CeO2 have been prepared for the catalysis of methane steam reforming (MSR) aiming for coke-resistant noble metal-free catalysts. The catalysts have been synthesized by traditional incipient ...

    • Bimetallic Ru–Pd supported on CeO2 for the catalytic partial oxidation of methane into syngas 

      Fazlikeshteli, Shiva; Vendrell Villafruela, Xavier; Llorca Piqué, Jordi (2023-02-15)
      Article
      Accés obert
      A series of monometallic Ru, Pd, and bimetallic Ru–Pd catalysts loaded on CeO2 support have been prepared via mechanochemical and conventional incipient wetness impregnation methods and used in the partial oxidation of ...

    • Ceria-based catalysts studied by near ambient pressure x-ray photoelectron spectroscopy: A review 

      García de Andrés, Xènia; Soler Turu, Lluís; Jiménez Divins, Nuria; Vendrell Villafruela, Xavier; Serrano Carreño, M. Isabel; Lucentini, Ilaria; Prat Albert, Jordi; Solano Minuesa, Eduardo; Tallarida, Massimo; Escudero, Carlos; Llorca Piqué, Jordi (2020-03-03)
      Article
      Accés obert
      The development of better catalysts is a passionate topic at the forefront of modern science, where operando techniques are necessary to identify the nature of the active sites. The surface of a solid catalyst is dynamic ...

    • CO oxidation on ceria studied by electrochemical impedance spectroscopy 

      Vendrell Villafruela, Xavier; Kubyshin, Yu A.; Mestres, Lourdes; Llorca Piqué, Jordi (2020-09-14)
      Article
      Accés obert
      Electrochemical impedance spectroscopy technique has been widely used to analyze the electrical properties of a large number of materials. In this study, the electrical properties of CeO2 pellets under CO oxidation conditions ...

    • Curs 0: preparació per als estudis a l’EEBE 

      Tornil Sin, Sebastián; Botey Cumella, Muriel; Alarcón Jordán, Marta; Alcaraz Sendra, Olga; Ametller Congost, Lluís; Bruna Escuer, Pere; Camps Anaya, Germinal; Carmona Mejías, Ángeles; Claverol Aguas, Mercè; Crespo Artiaga, Daniel; Pablo Ribas, Joan de; Barrio Casado, María del; Valle Mendoza, Luis Javier del; Encinas Bachiller, Andrés Marcos; Farran Marsà, Adriana; Florido Pérez, Antonio; Gámez López, Antonio; García Senz, Domingo; Gibert Agulló, Oriol; Ikhouane, Fayçal; Jiménez Jiménez, María José; José Pont, Jordi; Linares Alegret, Manuel; Lloveras Muntané, Pol Marcel; López López, José; Macovez, Roberto; Mas Blesa, Albert; Mitjana Riera, Margarida; Muñoz Romero, José; Pardo Soto, Luis Carlos; Periago Oliver, M. Cristina; Pineda Soler, Eloi; Pradell Cara, Trinitat; Ruiz Ordóñez, Magda; Sala Cladellas, Glòria; Soler Turu, Lluís; Tamarit Mur, José Luis; Vendrell Villafruela, Xavier; Zanuy Gomara, David (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2022-05)
      Article
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      Aquest article presenta el desenvolupament i primers resultats d'ús d'un conjunt de cursos virtuals que pretenen proporcionar uns coneixements inicials bàsics de Matemàtiques, Física i !ímica als estudiants que accedeixen ...

    • Exploring different sintering atmospheres to reduce nonlinear response of modified KNN piezoceramics 

      Vendrell Villafruela, Xavier; García García, José Eduardo; Rubio Marcos, F.; Ochoa Guerrero, Diego A.; Mestres Vila, Lourdes; Fernández, José F. (Elsevier, 2013-04)
      Article
      Accés restringit per política de l'editorial
      Dense lead-free (K0.44Na0.52Li0.04)(Nb0.86Ta0.10Sb0.04)O3 piezoelectric ceramics are prepared by the conventional mixed oxide method. The effect of different sintering conditions (synthetic air, O2 and Ar) on some structural, ...

    • Growth and physical properties of highly oriented La-doped (K,Na)NbO3 ferroelectric thin films 

      Vendrell Villafruela, Xavier; Raymond, Oscar; Ochoa Guerrero, Diego A.; García García, José Eduardo; Mestres, Lourdes (2015-02-27)
      Article
      Accés obert
      Lead-free (K,Na)NbO3 (KNN) and La doped (K,Na)NbO3 (KNN-La) thin films are grown on SrTiO3 substrates using the chemical solution deposition method. The effect of adding different amounts of Na and K excess (0-20 mol%) is ...

    • Impedance spectroscopy: A useful technique to unveil the mechanism of a CO oxidation reaction 

      Dos Santos Veiga, Emerson Luiz; Beltrán Mir, Hector; Vendrell Villafruela, Xavier; Llorca Piqué, Jordi; Cordoncillo, Eloísa (John Wiley & sons, 2024-01-01)
      Article
      Accés obert
      In this work, the impedance spectroscopy (IS) technique was used to aid in understanding the reaction mechanism of the CO oxidation reaction using the Pr2Zr2-xFexO7±d (x = 0 and 0.10) mixed oxide as a heterogeneous catalyst. ...

    • Improving the functional properties of (K0.5Na0.5)NbO3 piezoceramics by acceptor doping 

      Vendrell Villafruela, Xavier; García García, José Eduardo; Bril, X; Ochoa Guerrero, Diego A.; Mestres, Lourdes; Dezanneau, Guillem (Elsevier, 2015-01-01)
      Article
      Accés obert
      ZrO2 and TiO2 modified lead-free (K0.5Na0.5)NbO3 (KNN) piezoelectric ceramics are prepared by a conventional solid-state reaction. The effect of acceptor doping on structural and functional properties is investigated. A ...

    • Induced p-type semiconductivity in yttria-stabilized zirconia 

      Vendrell Villafruela, Xavier; West, Anthony R. (2019-01-01)
      Article
      Accés obert
      8 mol% yttria-stabilized zirconia (8YSZ) ceramic is an oxide ion conductor at atmospheric pressure but shows the onset of p-type semiconduction, in addition to the preexisting oxide ion conduction, on application of a dc ...

    • Investigation of the evolution of Pd-Pt supported on ceria for dry and wet methane oxidation 

      Jiménez Divins, Nuria; Braga, Andrea; Vendrell Villafruela, Xavier; Serrano Carreño, M. Isabel; García de Andrés, Xènia; Soler Turu, Lluís; Lucentini, Ilaria; Danielis, Maila; Mussio, Andrea; Colussi, Sara; Villar García, Ignacio J.; Escudero, Carlos; Trovarelli, Alessandro; Llorca Piqué, Jordi (2022-08-29)
      Article
      Accés obert
      Efficiently treating methane emissions in transportation remains a challenge. Here, we investigate palladium and platinum mono- and bimetallic ceria-supported catalysts synthesized by mechanical milling and by traditional ...

    • Low-temperature methane partial oxidation over Pd supported on CeO2: effect of the preparation method and precursors 

      Fazlikeshteli, Shiva; Llorca Piqué, Jordi; Vendrell Villafruela, Xavier (MDPI AG, 2021-02-17)
      Article
      Accés obert
      The catalytic production of syngas by the partial oxidation of methane (POM) was investigated over Pd supported on ceria (0.5–2 Pd wt.%) prepared by incipient wetness impregnation and by mechanochemical methods. The ...

    • Low-temperature partial oxidation of methane over Pd–Ni bimetallic catalysts supported on CeO2 

      Fazlikeshteli, Shiva; Vendrell Villafruela, Xavier; Llorca Piqué, Jordi (2022-08)
      Article
      Accés obert
      Monometallic Pd and Ni and bimetallic Pd–Ni catalysts supported on CeO2 are prepared via mechanochemical and conventional incipient wetness impregnation methods and tested for the production of syngas by the partial oxidation ...

    • Operando NAP-XPS studies of a ceria-supported Pd catalyst for CO oxidation 

      García de Andrés, Xènia; Soler Turu, Lluís; Vendrell Villafruela, Xavier; Serrano Carreño, M. Isabel; Herrera, Facundo; Prat, Jordi; Solano Minuesa, Eduardo; Tallarida, Massimo; Llorca Piqué, Jordi; Escudero, Carlos (Multidisciplinary Digital Publishing Institute (MDPI), 2022-12-20)
      Article
      Accés obert
      Supported Pd/CeO2 catalytic systems have been widely investigated in the low-temperature oxidation of CO (LTO CO) due to the unique oxygen storage capacity and redox properties of the ceria support, which highly influence ...

    • Revealing the role of the constant phase element in relaxor ferroelectrics 

      Vendrell Villafruela, Xavier; Ramírez González, Julia; Ye, Zuo-Guang; West, Anthony R. (2022-01-10)
      Article
      Accés obert
      Relaxor ferroelectrics exhibit both static and dynamic local structural order which controls their frequency-dependent electrical properties. A combination of advanced scattering and microscopy techniques have been used ...

    • Review of the Decomposition of Ammonia to Generate Hydrogen 

      Lucentini, Ilaria; García de Andrés, Xènia; Llorca Piqué, Jordi; Vendrell Villafruela, Xavier (American Chemical Society (ACS), 2021-05-21)
      Article
      Accés obert
      Because of the problems associated with the generation and storage of hydrogen in portable applications, the use of ammonia has been proposed for on-site production of hydrogen through ammonia decomposition. First, an ...

    • Rural Studio 

      Vendrell Villafruela, Xavier (2017-05)
      Audiovisual
      Accés obert