Now showing items 1-20 of 32

    • 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)
      Part of book or chapter of book
      Restricted access - publisher's policy
      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)
      Article
      Restricted access - publisher's policy
      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)
      Article
      Open Access
      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)
      Article
      Open Access
      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 ...
    • 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
      Open Access
      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 ...
    • Catalytic hydrogen production over RhPd/CeO2 catalysts and CO purification over Au/TiO2 catalysts 

      Jiménez Divins, Nuria (Universitat Politècnica de Catalunya, 2015-04-10)
      Doctoral thesis
      Open Access
      This Thesis focuses on the study of the catalytic production of hydrogen from a biofuel, namely the bioethanol. It also studies the subsequent purification of pre-cleaned reformate streams. The end use of the hydrogen ...
    • 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)
      Article
      Restricted access - publisher's policy
      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 ...
    • Enhancing the performance of a novel CoRu/CeO2 bimetallic catalyst for the dry reforming of methane via a mechanochemical process 

      Armengol Profitós, Marina; Braga, Andrea; Pascua Solé, Laia; Lucentini, Ilaria; García de Andrés, Xènia; Soler Turu, Lluís; Vendrell Villafruela, Xavier; Serrano Carreño, M. Isabel; Villar García, Ignacio J.; Pérez Dieste, Virginia; Escudero, Carlos; Jiménez Divins, Nuria; Llorca Piqué, Jordi (Elsevier, 2024-05-15)
      Article
      Open Access
      A mechanochemical synthesis method has been used to synthesize CoRu nanoparticles supported on CeO2 for methane dry reforming. In this work, we study the effect of Ru addition to Co/CeO2-based catalysts and of the synthesis ...
    • 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)
      Article
      Restricted access - publisher's policy
      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)
      Article
      Restricted access - publisher's policy
      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). ...
    • High yield hydrogen production enabled by macroporous silicon monoliths 

      Vega Bru, Didac; Jiménez Divins, Nuria; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Llorca Piqué, Jordi (Phantoms Foundation, 2023)
      Conference lecture
      Restricted access - publisher's policy
      A macroporous silicon (MPS) membrane of 210 µm thickness was functionalized and evaluated for hydrogen production by steam reforming of various fuels. Performance is comparable to conventional reactors, but in a much ...
    • Hydrogen production from ethanol over Pd-Rh/CeO2 with a metallic membrane reactor 

      López, Eduardo; Jiménez Divins, Nuria; Llorca Piqué, Jordi (2012-10-15)
      Article
      Restricted access - publisher's policy
      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 ...
    • 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
      Open Access
      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 ...
    • Investigation of the mechanochemically promoted Pd–Ce interaction under stoichiometric methane oxidation conditions 

      Danielis, Maila; Jiménez Divins, Nuria; Llorca Piqué, Jordi; Soler Turu, Lluís; García de Andrés, Xènia; Serrano Carreño, M. Isabel; Betancourt, Luis E.; Xu, Wenqian; Rodriguez, Jose A.; Senanayake, Sanjaya D.; Colussi, Sara; Trovarelli, Alessandro (2023)
      Article
      Open Access
      The optimization of the supported Pd phase for CH4 activation on Pd/CeO2 catalysts has been a matter of great interest in the recent literature, aiming at the design of efficient methane abatement catalysts for Natural Gas ...