Now showing items 1-12 of 241

    • Enhanced photoproduction of hydrogen on Pd/TiO2 prepared by mechanochemistry 

      Chen, Yufen; Soler Turu, Lluís; Armengol Profitós, Marina; Xie, Chenyang; Crespo Artiaga, Daniel; Llorca Piqué, Jordi (Elsevier, 2022-07-15)
      Article
      Open Access
      Supported metal clusters are considered as promising cocatalysts in heterogeneous photocatalysis due to their singular geometric structures and unique reactivity. Nevertheless, to explore efficient synthetic routes that ...
    • Au/TiO2 2D-photonic crystals as UV–visible photocatalysts for H2 production 

      Torras, Miquel; Molet, Pau; Soler Turu, Lluís; Llorca Piqué, Jordi; Roig, Anna; Mihi, Agustin (2022-02-10)
      Article
      Restricted access - publisher's policy
      Noble metal decoration of wideband gap semiconductors enables the excitation of surface plasmons in the visible range that upon relaxation generate hot carriers used for catalysis. However, this strategy leads to photocatalytic ...
    • 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
      Restricted access - publisher's policy
      Mo/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 ...
    • Preparation of SBA-15 and Zr-SBA-15 materials by direct-synthesis and pH-adjustment methods 

      Chimentäo, Ricardo José; Peixoto, Agnes; Llorca Piqué, Jordi (2021-10-15)
      Article
      Restricted access - publisher's policy
      SBA-15 mesoporous silica materials with zirconium atoms incorporated into its structure were prepared by two methods: direct-synthesis and pH-adjustment. Two nominal ratios of Zr/Si = 0 and 0.10 were evaluated. N2-physisorption, ...
    • Ligand conversion in nanocrystal synthesis: the oxidation of alkylamines to fatty acids by nitrate 

      Calcabrini, Mariano; Miquel Ribot, Sebastià; Llorca Piqué, Jordi (American Chemical Society (ACS), 2021-11-22)
      Article
      Open Access
      Ligands are a fundamental part of nanocrystals. They control and direct nanocrystal syntheses and provide colloidal stability. Bound ligands also affect the nanocrystals’ chemical reactivity and electronic structure. Surface ...
    • Catalytic ammonia decomposition over Ni-Ru supported on CeO2 for hydrogen production: Effect of metal loading and kinetic analysis 

      Lucentini, Ilaria; García Colli, Germán; Luzi, Carlos Daniel; Serrano Carreño, M. Isabel; Martínez, Osvaldo Miguel; Llorca Piqué, Jordi (Elsevier, 2021-06-05)
      Article
      Restricted access - publisher's policy
      Ceria-supported Ni-Ru bimetallic catalysts with different metal loadings have been prepared by co-impregnation, characterized and tested in the production of hydrogen from the catalytic decomposition of ammonia. The ...
    • PbS-Pb-Cu xS Composites for Thermoelectric Application 

      Li, Mengyao; Liu, Yu; Zhang, Yu; Han, Xu; Xiao, Ke; Nabahat, Mehran; Arbiol, Jordi; Llorca Piqué, Jordi; Alzate Ibáñez, Angélica María; Cabot, Andreu (2021-10-19)
      Article
      Restricted access - publisher's policy
      Composite materials offer numerous advantages in a wide range of applications, including thermoelectrics. Here, semiconductor-metal composites are produced by just blending nanoparticles of a sulfide semiconductor obtained ...
    • The importance of surface adsorbates in solution-processed thermoelectric materials: the case of SnSe 

      Liu, Yu; Calcabrini, Mariano; Yu, Yuan; Genç, Aziz; Chang, Cheng; Costanzo, Tommaso; Kleinhanns, Tobias; Lee, Seungho; Llorca Piqué, Jordi; Cojocaru-Mirédin, Oana; Ibánez, María (John Wiley & sons, 2021-12-29)
      Article
      Open Access
      Solution synthesis of particles emerges as an alternative to prepare thermoelectric materials with less demanding processing conditions than conventional solid-state synthetic methods. However, solution synthesis generally ...
    • Photocatalytic hydrogen production from alcohol aqueous solutions over TiO2-activated carbon composites decorated with Au and Pt 

      Serafin, Jaroslaw; Ouzzine, Mohammed; Srensce-Nazzal, Joanna; Llorca Piqué, Jordi (2022-03)
      Article
      Restricted access - publisher's policy
      Nanocomposites based on titanium dioxide loaded with metal nanoparticles (Au and Pt) and activated carbon were synthesized and tested for hydrogen photogeneration in the gas phase using a mixture of alcohol-water (methanol, ...
    • 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
      Restricted access - publisher's policy
      Ceria 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 ...
    • 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
      Open Access
      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 ...
    • Molecular engineering to tune the ligand environment of atomically dispersed nickel for efficient alcohol electrochemical oxidation 

      Liang, Zhifu; Jiang, Daochuan; Wang, Xiang; Shakouri, Mohsen; Zhang, Ting; Li, Zhongjun; Tang, Pengyi; Llorca Piqué, Jordi; Liu, Lijia; Yuan, Yupeng; Heggen, Marc; Dunin-Borkowski, Rafal E.; Morante Lleonart, Joan Ramon; Cabot Codina, Andreu; Arbiol, Jordi (2021-09-16)
      Article
      Open Access
      Atomically dispersed metals maximize the number of catalytic sites and enhance their activity. However, their challenging synthesis and characterization strongly complicates their optimization. Here, the aim is to demonstrate ...