Exploració per autor "Llorca Piqué, Jordi"
Ara es mostren els items 334-347 de 347
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Ultradispersed Mo/TiO2 catalysts for CO2 hydrogenation to methanol
Pérez Dieste, Virginia; Llorca Piqué, Jordi; Puzenat, Eric; Afanasiev, Pavel; Morfin, Franck; Piccolo, Laurent (Royal Society of Chemistry (RSC), 2021-09-21)
Article
Accés obertMo/TiO2 catalysts with atomic dispersion of molybdenum appear active and stable in the gas-phase hydrogenation of CO2. A comparison between various titania materials shows a crucial effect of the support surface structure ... -
Unraveling the chemical state of cobalt in Co-based catalysts during Ethanol steam reforming: an in situ study by near ambient pressure XPS and XANES
Huck-Iriart, Cristián; Soler Turu, Lluís; Casanovas Grau, Albert; Marini, Carlo; Prat, Jordi; Llorca Piqué, Jordi; Escudero, Carlos (2018-01-01)
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Accés obert -
Unveiling the role of counter-anions in amorphous transition metal-based oxygen evolution electrocatalysts
Wang, Xiang; Xu, Han; Du, Ruifeng; Liang, Zhifu; Zuo, Yong; Guardia, Pablo; Li, Junshan; Llorca Piqué, Jordi; Arbiol Cobos, Jordi; Zheng, Renji; Cabot, Andreu (Elsevier, 2023-01-01)
Article
Accés restringit per política de l'editorialAt the initial stage of the oxygen evolution reaction (OER) most electrocatalysts undergo structural and chemical surface reconstruction. While this reconstruction strongly influences their performance, it is frequently ... -
UO2 surface oxidation by mixtures of water vapor and hydrogen as a function of temperature
Espriu Gascon, Alexandra; Llorca Piqué, Jordi; Domínguez Escalante, Montserrat; Giménez Izquierdo, Francisco Javier; Casas Pons, Ignasi; Pablo Ribas, Joan de (Elsevier, 2015-12-01)
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Accés obertIn the present work, X-Ray Photoelectron Spectroscopy (XPS) was used to study the effect of water vapor on the UO2 surface as a function of temperature. The experiments were performed in situ inside a high pressure chamber ... -
Up-conversion luminescence coupled to plasmonic gold nanorods for light harvesting and hydrogen production
AlGhamdi, H.; Katsiev, K.; Wahab, A.K.; Llorca Piqué, Jordi; Idriss, Hicham (2017-11-07)
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Accés obertThe conversion of infrared light to visible-light which allows a larger fraction of sun-light to be used is needed to improve light-harvesting. In this work a tri-functional material composed of an up-converter (NaYF4–Yb–Tm), ... -
UV to far-IR reflectance spectra of carbonaceous chondrites - I. Implications for remote characterization of dark primitive asteroids targeted by sample-return missions
Trigo Rodríguez, Josep Maria; Moyano Cambero, Carles E.; Llorca Piqué, Jordi; Fornasier, Sonia; Barucci, Maria Antonietta; Belskaya, Irina N.; Martins, Zita; Rivkin, Andrew S.; Dotto, Elisabetta; Madiedo, José María; Alonso Azcárate, Jacinto (2014-01-01)
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Accés restringit per política de l'editorialWe analyse here a wide sample of carbonaceous chondrites from historic falls (e.g. Allende, Cold Bokkeveld, Kainsaz, Leoville, Murchison, Murray, Orgueil and Tagish Lake) and from NASA Antarctic collection.With the ... -
Vegetable oil tansesterification in supercritical conditions using Co-solvent carbon dioxide over solid catalysts: A screening study
Saez, B; Santana, A; Ramírez-Llodra, E.; Maçaira Nogueira, Jose Miguel Lopes; Ledesma Rodriguez, Cristian; Llorca Piqué, Jordi; Larrayoz Iriarte, María Angeles (American Chemical Society (ACS), 2014-09-01)
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Accés restringit per política de l'editorialThe transesterification reaction employing supercritical methanol and carbon dioxide used as a co-solvent in the presence of several heterogeneous solid acid catalysts was investigated. The solid acid catalysts were prepared ... -
Visible light-driven H2 production over highly dispersed Ruthenia on Rutile TiO2 nanorods
Thuy Duong, Nguyen-Phan; Luo, Si; Vovchock, Dimitriy; Llorca Piqué, Jordi; Graciani, Jesus; Fernandez Sanz, Javier; Sallis, Shawn; Xu, Wenquian; Bai, jianming; Piper, Louis F. J.; Polyansky, Dmitri E.; Fujita, Etsuko; Senanayake, S. D; Stacchiola, Dario J. (2016-01)
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Accés obertThe immobilization of miniscule quantities of RuO2 (~0.1%) onto one-dimensional (1D) TiO2 nanorods (NRs) allows H2 evolution from water under visible light irradiation. Rod-like rutile TiO2 structures, exposing preferentially ... -
Water splitting reaction on Ce0.15Zr0.85O2 driven by surface heterogeneity
Pappacena, Alfonsina; Boaro, Marta; Armelao, Lidia; Llorca Piqué, Jordi; Trovarelli, Alessandro (2016)
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Accés obertCe0.15Zr0.85O2 was investigated in the two-step water splitting reaction. High-temperature treatment in N-2 induced compositional and structural heterogeneities which contributed to a six-fold increase of H-2 yield after ... -
Water-gas-shift over metal-free nanocrystalline ceria: an experimental and theoretical study
Guild, Curtis J.; Vovchok, Dimitriy; Kriz, David A.; Bruix, Albert; Hammer, Bjork; Llorca Piqué, Jordi; Xu, Wenquian; El-Sawy, Abdelhamid; Biswas, Sourav; Rodriguez, Jose A.; Senanayake, S. D; Suib, Steven L. (2017-04-21)
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Accés obertA tandem experimental and theoretical investigation of a mesoporous ceria catalyst reveals the properties of the metal oxide are conducive for activity typically ascribed to metals, suggesting reduced Ce3+ and oxygen ... -
Water-mediated photo-induced reduction of platinum films
Fraxedas Calduch, Jordi; Zhang, Kuan; Sepulveda, Borja; Esplandiu, María José; García de Andrés, Xènia; Llorca Piqué, Jordi; Pérez Dieste, Virginia; Escudero, Carlos (2019-06-11)
Article
Accés restringit per política de l'editorialPlatinum thin films activated ex situ by oxygen plasma become reduced by the combined effect of an intense soft X-ray photon beam and condensed water. The evolution of the electronic structure of the surface has been ... -
X-ray photoelectron and Raman spectroscopy of nanostructured ceria in soot oxidation under operando conditions
García de Andrés, Xènia; Soler Turu, Lluís; Casanovas Grau, Albert; Escudero, Carlos; Llorca Piqué, Jordi (2021-06)
Article
Accés obertCeria nanoshapes exhibiting different amounts of {100}, {110} and {111} facets (cubes, rods, octahedra and polyhedra) were prepared, characterized, tested in the carbon soot oxidation reaction, and studied by operando near ... -
X-ray photoelectron spectroscopy (XPS) study of surface oxidation of UO2 doped with Gd2O3 at different temperatures and atmospheres
García Gómez, Sonia; Giménez Izquierdo, Francisco Javier; Casas Pons, Ignasi; Llorca Piqué, Jordi; Pablo Ribas, Joan de (2023-08)
Article
Accés obertIn this work, the influence of GdIII doping on the surface oxidation of UO2 has been investigated in situ by XPS. The samples were put in contact with either hydrogen, argon or synthetic air streams saturated with water ... -
ZnSe/N-doped carbon nanoreactor with multiple adsorption sites for stable lithium–sulfur batteries
Arbiol Cobos, Jordi; Llorca Piqué, Jordi; Cabot, Andreu (2020-10-21)
Article
Accés obertTo commercially realize the enormous potential of lithium–sulfur batteries (LSBs) several challenges remain to be overcome. At the cathode, the lithium polysulfide (LiPS) shuttle effect must be inhibited and the redox ...