Now showing items 1-20 of 261

    • 3D printed microstructured Au/TiO2 catalyst for hydrogen photoproduction 

      Elkoro Ugarteburu, Ander; Soler Turu, Lluís; Llorca Piqué, Jordi; Casanova Hormaechea, Ignasi (Elsevier, 2019-06-25)
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      We successfully 3D printed Au/TiO2 monoliths for photogenerating hydrogen from water/ethanol gaseous mixtures under dynamic conditions. Monolith designs were printed by additive superposition of microfilaments of titania-based ...
    • 4-Mercaptophenyldiphenylphosphine as linker to immobilize Pd onto the surface of magnetite nanoparticles. Excellent catalytic efficiency of the system after partial linker removal 

      Guarnizo, A; Angurell Purroy, Inmaculada; Rosell, Monica; Llorca Piqué, Jordi; Müller Jevenois, Guillermo; Seco, M; Rossell Alfonso, Josep Oriol (2015-10-27)
      Article
      Open Access
      This journal is © The Royal Society of Chemistry. The molecule 4-mercaptophenyldiphenylphosphine (Sdp) has been synthesized for use as a linker to immobilize Pd nanoparticles onto the surface of magnetite nanoparticles. ...
    • 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)
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      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 comparative study of water-immiscible organic solvents in the production of furfural from xylose and birch hydrolysate 

      Gómez Millán, Gerardo; Hellsten, Sanna; King, Alistair W.T.; Pokki, Juha-Pekka; Llorca Piqué, Jordi; Sixta, Herbert (2019-04-25)
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      Furfural (FUR) was produced from xylose using a biphasic batch reaction system. Water-immiscible organic solvents such as isophorone, 2-methyltetrahydrofuran (2-MTHF) and cyclopentyl methyl ether (CPME) were used to promptly ...
    • A general approach to fabricate fe3O4 nanoparticles decorated with Pd, Au, and Rh: Magnetically recoverable and reusable catalysts for Suzuki C-C cross-coupling reactions, hydrogenation, and sequential reactions 

      Gonzàlez de Rivera, Ferran; Angurell Purroy, Inmaculada; Rossell Abrodos, Marta-Dacil; Erni, Rolf P.; Llorca Piqué, Jordi; Jiménez Divins, Nuria; Müller Jevenois, Guillermo; Seco García, Miquel Angel; Rossell Alfonso, Josep Oriol (2013-09-02)
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      A facile strategy has been explored for loading noble metals onto the surface of ferrite nanoparticles with the assistance of phosphine-functionalized linkers. Palladium loading is shown to occur with participation of both ...
    • A low temperature solid state reaction to produce hollow MnxFe3-xO4 nanoparticles as anode for lithium-ion batteries 

      Yu, Xiaoting; Zhang, C.; Luo, Zhishan; Liu, Junshan; Zuo, Yong; Jacas Biendicho, Jordi; Llorca Piqué, Jordi; Arbiol, Jordi; Morante Lleonart, Joan Ramon; Cabot, Andreu (2019-12-01)
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      Hollow MnxFe3-xO4 nanoparticles (NPs) with an average size of 15¿nm are produced from the solid state reaction of Fe3O4–Mn3O4 heterostructures. These heterostructures are synthesized through the seeded-growth of Mn3O4 ...
    • A luminescent hydrogel based on a new Au(i) complex 

      Gavara, Raquel; Llorca Piqué, Jordi; Lima, Joao Carlos; Rodríguez Raurell, Laura (2013-01-04)
      Article
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      The reaction of the water soluble phosphine 1,3,5-triaza-7-phosphaadamantane (PTA) with [Au(CRC–C5H4N)]n yields the highly luminescent water soluble [(PTA)Au(4-pyridylethynyl)] complex. A detailed analysis of the compound ...
    • A million-channel CO-PrOx microreactor on a fingertip for fuel cell application 

      Llorca Piqué, Jordi; Rosell, O.; Divins, N.J.; López, E.; Roig Costa, Maria; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; González de Rivera, F.; Rodríguez, L.I.; Seco, M. (2010)
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      A silicon micromonolith containing ca.40000 regular channels of 3.3 μm in diameter per square millimeter has been successfully functionalized with anAu/TiO2 catalyst for CO preferential oxidation(CO-PrOx) in the presence ...
    • A million-microchannel multifuel steam reformer for hydrogen production 

      Jiménez Divins, Nuria; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Llorca Piqué, Jordi (2020-05-05)
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      A functionalized silicon micromonolith of 7¿mm in diameter and 210¿µm-thick was evaluated for the production of hydrogen from the steam reforming (SR) of various fuels, containing different functional groups, such as ...
    • A nafion film cover to enhance the analytical performance of the CuO/Cu electrochemical sensor for determination of chemical oxygen demand 

      Carchi, Tany; Lapo, Byron; Alvarado, José; Espinoza Montero, Patricio J.; Llorca Piqué, Jordi; Fernández, Lenys (Multidisciplinary Digital Publishing Institute (MDPI), 2019-02-06)
      Article
      Open Access
      We modified and evaluated the performance of a CuO/Cu electrochemical electrode for chemical oxygen demand (COD) determination by covering it with a Nafion (Nf) film. The resulting modified CuONf/Cu electrode sensor was ...
    • A Pd/Al2O3-based micro-reformer unit fully integrated in silicon technology for H-rich gas production 

      Bianchini, Marco; Alayo, Nerea; Soler Turu, Lluís; Salleras, M.; Fonseca Chácharo, Luis; Llorca Piqué, Jordi; Tarancón Rubio, Albert (Institute of Physics (IOP), 2019-11-01)
      Article
      Open Access
      This work reports the design, manufacturing and catalytic activity characterization of a micro-reformer for hydrogen-rich gas generation integrated in portable-solid oxide fuel cells (µ-SOFCs). The reformer has been designed ...
    • A plausible link between the asteroid 21 Lutetia and CH carbonaceous chondrites 

      Moyano Cambero, Carles E.; Trigo-Rodríguez, José María; Llorca Piqué, Jordi; Fornasier, Sonia; Barucci, Maria Antonietta; Rimola, Albert (2016-10-01)
      Article
      Open Access
      A crucial topic in planetology research is establishing links between primitive meteorites and their parent asteroids. In this study, we investigate the feasibility of a connection between asteroids similar to 21 Lutetia, ...
    • A SnS2 molecular precursor for conformal nanostructured coatings 

      Zuo, Yong; Li, Junshan; Yu, Xiaoting; Du, Ruifeng; Zhang, Ting; Wang, Xiang; Arbiol, Jordi; Llorca Piqué, Jordi; Cabot, Andreu (American Chemical Society (ACS), 2020-02-11)
      Article
      Open Access
      We present a simple, versatile, and scalable procedure to produce SnS2 nanostructured layers based on an amine/thiol-based molecular ink. The ratios amine/thiol and Sn/S, and the reaction conditions, are systematically ...
    • A straightforward method to prepare supported Au clusters by mechanochemistry and its application in photocatalysis 

      Chen, Yufen; Soler Turu, Lluís; Xie, Chenyang; Vendrell, Xavier; Serafin, Jaroslaw; Crespo Artiaga, Daniel; Llorca Piqué, Jordi (Elsevier, 2020-12)
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      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 ...
    • Absorption mechanisms in macroporous silicon photonic crystals 

      Segura García, Daniel; Cardador Maza, David; Rodríguez Martínez, Ángel; Llorca Piqué, Jordi (Elsevier, 2019-01-01)
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      We investigate the large differences classically found in literature between theoretical and empirical results in the optical characterization of macroporous silicon photonic crystals. Mainly, we study the impact of two ...
    • Al2O3-supported Pt/Rh catalysts for NOx removal under lean conditions 

      Castoldi, Lidia; Matarrese, Roberto; Daturi, Marco; Llorca Piqué, Jordi; Lietti, Luca (2019-07-05)
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      In this work the reactivity of Pt-Rh NOx storage-reduction (NSR) catalysts in the reduction of NOx under lean conditions is investigated. It is found that significant amounts of NOx are stored on both Rh- and Pt-based ...
    • Alcohols and bio-alcohols steam and autothermal reforming in a membrane reactor 

      Llorca Piqué, Jordi; Hedayati, Ali (2014-11-28)
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      Considerable work has been reported concerning catalytic steam reforming, partial oxidation and oxidative steam reforming (autothermal reforming) aimed at hydrogen generation from alcohol-water mixtures. They include ...
    • Ambient pressure photoemission spectroscopy reveals the mechanism of carbon soot oxidation in ceria-based catalysts 

      Soler Turu, Lluís; Casanovas Grau, Albert; Escudero, Carlos; Pérez-Dieste, Virginia; Aneggi, Eleonora; Trovarelli, Alessandro; Llorca Piqué, Jordi (2016-06-27)
      Article
      Open Access
      Removing soot is one of the most important challenges in minimizing the impact of combustion engines on the environment. Catalysts based on CeO2 have proved suitable to oxidize soot due to their capacity to store and release ...
    • Ammonia decomposition over 3D-printed CeO2 structures loaded with Ni 

      Lucentini, Ilaria; Serrano Carreño, M. Isabel; Soler Turu, Lluís; Jiménez Divins, Nuria; Llorca Piqué, Jordi (2020-02-05)
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      Binder-free ceria pastes have been formulated and used to prepare ceria structures with a woodpile arrangement of microchannels through 3D printing. After loading them with nickel, these catalytic structures have been ...
    • An efficient and reusable catalyst based on Pd/CeO2 for the room temperature aerobic Suzuki–Miyaura reaction in water/ethanol 

      Amoroso, Francesco; Colussi, Sara; Del Zotto, Alessandro; Llorca Piqué, Jordi; Trovarelli, Alessandro (2010)
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      The Pd/CeO2 system behaves as an efficient precatalyst for the Suzuki–Miyaura cross-coupling under mild conditions (298 K, in air) in ethanol/water. A broad range of aryl bromides, including those deactivated, and ...