Now showing items 1-20 of 21

    • 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 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 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 ...
    • 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 ...
    • 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
      Open Access
      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 Total and Preferential Oxidation over Stable Au/TiO2 Catalysts Derived from Preformed Au Nanoparticles 

      Jiménez Divins, Nuria; López López, Eduardo; Angurell Purroy, Inmaculada; Neuberg, Stefan; Zapf, Ralf; Kolb, Gunther; Llorca Piqué, Jordi (2020-09-07)
      Article
      Open Access
      CO preferential oxidation (PROX) is an effective method to clean reformate H2 streams to feed low-temperature fuel cells. In this work, the PROX and CO oxidation reactions were studied on preformed Au nanoparticles (NPs) ...
    • CO-PrOx over nano-Au/TiO2: Monolithic catalyst performance and empirical kinetic model fitting 

      Moreno, Marta S.; Lopez, Eduardo; Adrover, E; Jiménez Divins, Nuria; Llorca Piqué, Jordi (2016-12-21)
      Article
      Open Access
      In this work, the performance of ceramic monoliths washcoated with Au/TiO2 is studied on CO preferential oxidation (CO-PrOx) reaction in H2-rich environments under a wide range of operating conditions of practical interest. ...
    • Effect of impregnation protocol in the metallic sites of Pt-Ag/activated carbon catalysts for water denitration 

      Aristizabal, A.; Contreras, Sandra; Jiménez Divins, Nuria; Llorca Piqué, Jordi; Medina Cabello, Francisco (2014-04-15)
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      The influence of the Pt precursor and the impregnation protocol in the catalytic behavior of 3%Pt-1.5%Ag supported on activated carbon for water denitration in a continuous reactor was studied. Pt(NH3)(4)(NO3)(2) and H2PtCl6 ...
    • Ethanol catalytic membrane reformer for direct PEM FC feeding 

      Koch, Reinhold; López, Eduardo; Jiménez Divins, Nuria; Allué Fantova, Miguel; Jossen, Andreas; Riera, Jordi (Riera Colomer); Llorca Piqué, Jordi (2013)
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      In this paper an ethanol reformer based on catalytic steam reforming with a catalytic honeycomb loaded with RhPd/CeO2 and palladium separation membranes with an area of 30.4 cm2 has been used to generate a pure hydrogen ...
    • Ethanol steam reforming for hydrogen generation over structured catalysts 

      López, Eduardo; Jiménez Divins, Nuria; Anzola, Andrés; Schbib, Susana; Borio, Daniel O.; Llorca Piqué, Jordi (2013-04)
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      The present paper reports on the preparation, characterization and reaction evaluation of structured catalysts toward hydrogen generation via ethanol steam reforming. To these ends, 400 cpsi cordierite monoliths were ...
    • Finding a suitable catalyst for on-board ethanol reforming using exhaust heat from an internal combustion engine 

      Casanovas Grau, Albert; Jiménez Divins, Nuria; Rejas García, Albert; Bosch Tous, Ricardo; Llorca Piqué, Jordi (2017-05-11)
      Article
      Open Access
      Ethanol steam reforming with pure ethanol and commercial bioethanol (S/C = 3) was carried out inside the housing of the exhaust gas pipe of a gasoline internal combustion engine (ICE) by using exhaust heat (610–620 °C). ...
    • Hydrogen production from ethanol over Pd-Rh/CeO2 with a metallic membrane reactor 

      López, Eduardo; Jiménez Divins, Nuria; Llorca Piqué, Jordi (2012-10-15)
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      The present paper reports on experimental results of an ethanol reformer equipped with a Pd-based metallic membrane toward the production of pure hydrogen, suited for PEM-fuel cell feeding. The ethanol steam reforming ...
    • In situ electrochemical oxidation of Cu2S into CuO nanowires as a durable and efficient electrocatalyst for oxygen evolution reaction 

      Zuo, Yong; Liu, Yongpeng; Li, Junshan; Du, Ruifeng; Han, Xu; Zhang, Ting; Arbiol, Jordi; Jiménez Divins, Nuria; Llorca Piqué, Jordi; Guijarro, Néstor; Sivula, Kevin; Cabot Codina, Andreu (2019-08-15)
      Article
      Open Access
      Development of cost-effective oxygen evolution catalysts is of capital importance for the deployment of large-scale energy-storage systems based on metal–air batteries and reversible fuel cells. In this direction, a wide ...
    • In situ photoelectron spectroscopy study of ethanol steam reforming over RhPd nanoparticles and RhPd/CeO2 

      Jiménez Divins, Nuria; Llorca Piqué, Jordi (2016-05-25)
      Article
      Open Access
      In situ X-ray photoelectron spectroscopy (XPS) was carried out over model Rh0.5Pd0.5 nanoparticles and Rh0.5Pd0.5 nanoparticles supported on CeO2 following exposure to oxygen at 573-823 K, to hydrogen at 573 K (activation ...
    • Macroporous silicon microreactor for the preferential oxidation of CO 

      Jiménez Divins, Nuria; López, E.; Llorca Piqué, Jordi; Vega, Didac; Rodríguez, A.; Gonzàlez de Rivera, Ferran; Angurell Purroy, Inmaculada; Seco García, Miquel Angel; Rossell Alfonso, Josep Oriol (IEEEXPLORE, 2013)
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      A macroporous silicon micromonolith containing ca. 40,000 regular channels of 3.3 ¿m in diameter per square millimeter has been successfully functionalized with an Au/TiO2 catalyst for CO preferential oxidation (CO-PrOx) ...
    • Methane oxidation activity and nanoscale characterization of Pd/CeO2 catalysts prepared by dry milling Pd acetate and ceria 

      Danielis, Maila; Orozco, Ivan; Jiménez Divins, Nuria; Llorca Piqué, Jordi; Rodriguez, Jose A.; Senanayake, Sanjaya D.; Colussi, Sara; Trovarelli, Alessandro (2021-03-01)
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      The milling of Palladium acetate and CeO2 under dry conditions results in robust, environmentally friendly catalysts with excellent methane oxidation activity. These catalysts show superior performance compared to those ...
    • Modelling and simulation of catalytic ammonia decomposition over Ni-Ru deposited on 3D-printed CeO2 

      Lucentini, Ilaria; García Colli, Germán; Luzi, Carlos Daniel; Serrano Carreño, M. Isabel; Soler Turu, Lluís; Jiménez Divins, Nuria; Martínez, Osvaldo Miguel; Llorca Piqué, Jordi (2022-01)
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      3D-printed ceria structures have been prepared by robocasting, without using any additive, and impregnated with different amounts of Ni and Ru, characterized and tested for the catalytic decomposition of ammonia in a fixed ...
    • Pt-Ag/activated carbon catalysts for water denitration in a continuous reactor: Incidence of the metal loading, Pt/Ag atomic ratio and Pt metal precursor 

      Aristizabal, A.; Contreras, Sandra; Jiménez Divins, Nuria; Llorca Piqué, Jordi; Medina, Francisco (2012-10-30)
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      Several Pt–Ag catalysts supported on activated carbon powder were tested in the catalytic reduction of nitrates in a continuous flow reactor. The influence of the noble metal precursor (Pt(NH3)4(NO3)2 or H2PtCl6), the Pt/Ag ...
    • Structural evolution of bimetallic PtPd/CeO2 methane oxidation catalysts prepared by dry milling 

      Mussio, Andrea; Danielis, Maila; Jiménez Divins, Nuria; Llorca Piqué, Jordi; Colussi, Sara; Trovarelli, Alessandro (2021-06-02)
      Article
      Open Access
      Bimetallic Pt–Pd catalysts supported on ceria have been prepared by mechanochemical synthesis and tested for lean methane oxidation in dry and wet atmosphere. Results show that the addition of platinum has a negative effect ...
    • The formation of nanodomains of Ce6O11 in ceria catalyzed soot combustion 

      Aneggi, Eleonora; Jiménez Divins, Nuria; de Leitenburg, Carla; Llorca Piqué, Jordi; Trovarelli, Alessandro (2014-04)
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      The behavior of a series of CeO2 catalysts in soot combustion reaction was investigated by HRTEM and XPS. It is shown that nanodomains of reduced ceria in the form of Ce6O11 develop during reaction under oxygen-containing ...