A5054674351- Catalytic Processes in Materials Science
- Catalysts for Methane Reforming
- Catalysis and Oxidation Reactions
- Astro and Planetary Science
- Electrocatalysts for Energy Conversion
- Catalysis and Hydrodesulfurization Studies
- Planetary Science and Exploration
- Advanced Photocatalysis Techniques
- Catalysis for Biomass Conversion
- Nanomaterials for catalytic reactions
- Copper-based nanomaterials and applications
- Isotope Analysis in Ecology
- Chalcogenide Semiconductor Thin Films
- Nanocluster Synthesis and Applications
- TiO2 Photocatalysis and Solar Cells
- Stellar, planetary, and galactic studies
- Quantum Dots Synthesis And Properties
- Mesoporous Materials and Catalysis
- Advanced battery technologies research
- Advanced Nanomaterials in Catalysis
- Layered Double Hydroxides Synthesis and Applications
- Advancements in Battery Materials
- Ammonia Synthesis and Nitrogen Reduction
- Chemical Looping and Thermochemical Processes
- Gas Sensing Nanomaterials and Sensors
Universitat Politècnica de Catalunya
2016-2025
Universitat de Barcelona
2000-2024
Astrophysique Relativiste, Théories, Expériences, Métrologie, Instrumentation, Signaux
2023
Universitat Rovira i Virgili
2010-2022
FC Barcelona
2015-2020
Energy Technologies Institute
2016-2020
Institut d'Estudis Catalans
2020
Politecnico di Milano
2017
Institut de Recerca en Energia de Catalunya
2010-2016
University of Udine
1996-2015
Engineering the shape and size of catalyst particles interface between different components heterogeneous catalysts at nanometer level can radically alter their performances. This is particularly true with CeO2-based catalysts, where precise control surface atomic arrangements modify reactivity Ce4+/Ce3+ ions, changing oxygen release/uptake characteristics ceria, which, in turn, strongly affects catalytic performance several reactions like CO, soot, VOC oxidation, WGS, hydrogenation,...
In this study, a series of conventional polycrystalline ceria and single-crystalline nanorods nanocubes were prepared by hydrothermal methods, their structural, redox, morphological properties investigated using XRD, SEM, HRTEM, BET, temperature-programmed reduction, oxygen storage capacity measurements. According to they are characterized exposure different surfaces: {100} surface for nanocubes; {100}, {110}, in part {111} nanorods; mainly ceria, with morphology dominated {111}-enclosed...
Because of the problems associated with generation and storage hydrogen in portable applications, use ammonia has been proposed for on-site production through decomposition. First, an analysis existing systems decomposition challenges this technology are presented. Then, state art catalysts used to date is described considering composed noble non-noble metals their combinations, as well novel materials such alkali metal amides imides. The effect supports promoters analyzed detail, catalytic...
An open superstructure: A Pd/CeO2 catalyst prepared by solution combustion synthesis is three to five times more active for CH4 than the best conventional palladium-based systems. The contains an ordered, stable Pd-O-Ce surface superstructure (see picture; cyan arrow a square-planar Pd site, red undercoordinated O atom) and example of ultra-highly dispersed, PdO within oxide carrier. Detailed facts importance specialist readers are published as ”Supporting Information”. Such documents...
The surface atomic arrangement of metal oxides determines their physical and chemical properties, the ability to control optimize structural parameters is crucial importance for many applications, in particular heterogeneous catalysis photocatalysis. Whereas structures macroscopic single crystals can be determined with established methods, nanoparticles (NPs), this a challenging task. Herein, we describe use CO as probe molecule determine structure surfaces exposed by rod-shaped ceria NPs....
Supported nanoparticles make the reaction faster Several techniques now allow surface structures used as catalysts to be probed during exposure reactive gases, opposed under vacuum conditions. Divins et al. near-ambient-pressure x-ray photoelectron spectroscopy compare effect of gases on unsupported palladium-rhodium versus ones a reducible cerium oxide support. For ethanol with steam produce hydrogen, supported were more and less prone reduction rearrangement. Science , this issue p. 620
Abstract The shuttle effect and the sluggish reaction kinetics of lithium polysulfide (LiPS) seriously compromise performance lithium–sulfur batteries (LSBs). To overcome these limitations enable fabrication robust LSBs, here use a Mott–Schottky catalyst based on bimetallic phosphide CoFeP nanocrystals supported carbon nitride tubular nanostructures as sulfur hosts is proposed. Theoretical calculations experimental data confirm that CoFeP@CN composites are characterized by suitable...
Development of cost-effective oxygen evolution catalysts is capital importance for the deployment large-scale energy-storage systems based on metal–air batteries and reversible fuel cells. In this direction, a wide range materials have been explored, especially under more favorable alkaline conditions, several metal chalcogenides particularly demonstrated excellent performances. However, are thermodynamically less stable than corresponding oxides hydroxides oxidizing potentials in media....
To commercially realize the enormous potential of lithium-sulfur batteries (LSBs) several challenges remain to be overcome. At cathode, lithium polysulfide (LiPS) shuttle effect must inhibited and redox reaction kinetics need substantially promoted. In this direction, work proposes a cathode material based on transition-metal selenide (TMSe) as both adsorber catalyst hollow nanoreactor architecture: ZnSe/N-doped carbon (ZnSe/NHC). It is here demonstrated experimentally by means density...
The shuttling behavior and sluggish conversion kinetics of the intermediate lithium polysulfides (LiPS) represent main obstructions to practical application lithium-sulfur batteries (LSBs). Herein, a 1D π-d conjugated metal-organic framework (MOF), Ni-MOF-1D, is presented as an efficient sulfur host overcome these limitations. Experimental results density functional theory calculations demonstrate that Ni-MOF-1D characterized by remarkable binding strength for trapping soluble LiPS species....
Abstract The shuttle effect and sluggish conversion kinetics of lithium polysulfides (LiPS) hamper the practical application lithium–sulfur batteries (LSBs). Toward overcoming these limitations, herein an in situ grown C 2 N@NbSe heterostructure is presented with remarkable specific surface area, as a Li–S catalyst LiPS absorber. Density functional theory (DFT) calculations experimental results comprehensively demonstrate that characterized by suitable electronic structure charge...
The shuttling of soluble lithium polysulfides (LiPS) and the sluggish Li-S conversion kinetics are two main barriers toward practical application lithium-sulfur batteries (LSBs). Herein, we propose addition copper selenide nanoparticles at cathode to trap LiPS accelerate reaction kinetics. Using both computational experimental results, demonstrate crystal phase concentration vacancies control electronic structure selenide, its affinity chemisorption, electrical conductivity. adjustment...
Metal clusters supported on TiO2 are widely used in many photocatalytic applications, including pollution control and production of solar fuels. Besides high photoactivity, stability during the photoreaction is another essential quality high-performance photocatalysts, however systematic studies this attribute absent for metal TiO2. Here we have studied, both experimentally with first-principles simulation methods, Pt, Pd Au prepared by ball milling nanoshaped anatase nanoparticles...