A5058062355- Nanomaterials for catalytic reactions
- Electrocatalysts for Energy Conversion
- Catalytic Processes in Materials Science
- Graphene research and applications
- Covalent Organic Framework Applications
- Advanced Photocatalysis Techniques
- Ammonia Synthesis and Nitrogen Reduction
- Catalytic Cross-Coupling Reactions
- Molecular Junctions and Nanostructures
- Carbon Nanotubes in Composites
- Luminescence and Fluorescent Materials
- Radical Photochemical Reactions
- Advancements in Battery Materials
- Surface Chemistry and Catalysis
- Supercapacitor Materials and Fabrication
- Metal-Organic Frameworks: Synthesis and Applications
- Muon and positron interactions and applications
- Porphyrin and Phthalocyanine Chemistry
- Advanced Nanomaterials in Catalysis
- Asymmetric Hydrogenation and Catalysis
- CO2 Reduction Techniques and Catalysts
- Graphene and Nanomaterials Applications
- Mesoporous Materials and Catalysis
- Carbon and Quantum Dots Applications
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
Universidad Autónoma de Madrid
2020-2024
National Interuniversity Consortium of Materials Science and Technology
2018-2021
University of Padua
2018-2021
Instituto Nacional del Carbón
2013-2019
IMDEA Nanoscience
2018
Universidad de Oviedo
2016
Instituto de Catálisis y Petroleoquímica
1997-1998
In the quest for designing efficient and stable photocatalytic materials CO2 reduction, hybridizing a selective noble-metal-free molecular catalyst carbon-based light-absorbing has recently emerged as fruitful approach. this work, we report about Co quaterpyridine complexes covalently linked to graphene surfaces functionalized by carboxylic acid groups. The nanostructured were characterized X-ray photoemission spectroscopy, absorption IR Raman spectroscopies, high-resolution transmission...
Abstract Crystalline porous organic polymers (CPPs) or covalent frameworks (COFs), are composed by light elements linked bonds. Despite the remarkable progress attained, there still bottlenecks limiting further development, some of them related to presence defects during their synthesis as well in‐depth understanding structure active centers and/or details reaction mechanism. Indeed, very often proposed structures far from reality because and disorders have not been considered. The present...
Oxidized multiwall carbon nanotubes (CNT) were covalently modified with appropriate hydroxyl-ending imidazolium salts using their carboxylic acid groups. Characterization of the imidazolium-modified samples through typical solid characterization techniques, such as TGA or XPS, allows for determination 16 wt % in CNT-1 and 31 CNT-2 amount imidazolic fragments nanotubes. The imidazolium-functionalized materials used to prepare nanohybrid containing iridium N-heterocyclic carbene (NHC)-type...
One of the most attractive applications carbon nanomaterials is as catalysts, due to their extreme surface-to-volume ratio. The substitution C with heteroatoms (typically B and N p- n-dopants) has been explored enhance catalytic activity. Here we show that encapsulation within weakly doping macrocycles can be used modify properties nanotubes towards reduction nitroarenes, either enhancing it (n-doping) or slowing down (p-doping). This artificial regulation strategy presents a unique...
Bifunctional graphene acid–Pd nanohybrids catalyse homo- and cross-coupling Suzuki reactions under eco-friendly conditions.
Efficient heterogeneous catalysis of hydrogen oxidation reaction (HOR) by platinum group metal (PGM)-free catalysts in proton-exchange membrane (PEM) fuel cells represents a significant challenge toward the development sustainable economy. Here, we show that graphene acid (GA) can be used as an electrode scaffold for noncovalent immobilization bioinspired nickel bis-diphosphine HOR catalyst. The highly functionalized structure this material and optimization electrode-catalyst assembly sets...
The encapsulation of an organic dye, 10-phenylphenothiazine (PTH), in the inner cavity single-walled carbon nanotubes (SWNTs) as a breaking heterogenization strategy is presented. PTH@oSWNT material was microscopically and spectroscopically characterized, showing intense photoemission when illuminated with visible light at nanoscale. Thus, employed heterogeneous photocatalyst single electron transfer dehalogenation reactions under irradiation. showed enhanced photocatalytic activity,...
A manganese-based metal-organic framework with dipyrazole ligands has been metalated atomically dispersed Rh and Co species used as a catalyst for the hydroformylation of styrene. The Rh-based materials exhibited excellent conversion at 80 °C complete chemoselectivity, high selectivity branched aldehyde, recyclability, negligible metal leaching.
GO's weaknesses as metal-free catalyst are overcome by graphene acid (GA), who performs better than metals in alcohol oxidations. Mechanistic insights and DFT calculations unravel key aspects on the catalytic cycle for control of selectivity.
Oxidation of the support increase HT catalytic activity.
Abstract Herein, the direct covalent functionalization of single‐walled carbon nanotubes (SWNT) is presented with an amino‐decorated phenyl‐phenothiazine (PTH‐NH 2 ) organophotocatalyst through diazonium chemistry protocol. Three different SWNT‐PTH hybrids are prepared by varying amount PTH‐NH and agent fully characterized. These differ not only in degree functionalization, but also chemical structure photophysical properties. The study shows that these features affect photoredox activity...
Thiol-terminated porphyrins are covalently attached to 2D-MoSe<sub>2</sub> edges. The HER activity is enhanced (or suppressed) by the presence absence) of hydroxyl groups in porphyrin. porphyrin/MoSe<sub>2</sub> hybrid forms a type II heterojunction with improved photoactivity.
Abstract Graphene acid (GA) is a novel graphene platform where the carboxylic groups are located in basal plane of carbon network. The chemical route to develop such has been proposed and final product displays series advantages with respect well‐known much used oxide (GO), i. e . more uniform functionalization an enhanced electronic conduction when compared GO. In this review we discuss most recent literature data which demonstrate that excellent GA properties may have impact on catalytic...
The hybrid materials resulting from the covalent attachment of iridium NHC complexes, bearing 3-methyl-imidazol-2-ylidene and 3-(propyl-3-sulfonate)-imidazol-2-ylidene ligands to carbon nanotubes through ester functions, efficiently catalyzed water oxidation under chemical electrochemical conditions. catalyst featuring an ligand with a propyl-sulfonate wingtip has shown improved catalytic performance compared that unfunctionalized material TOF50 numbers up 1140 h–1 using ammonium cerium(IV)...
The immobilization of TiO2 nanoparticles on graphene acid (GA), a conductive derivative densely functionalized with COOH groups, is presented. interaction between the carboxyl groups surface and titanium precursor leads to controlled heterogenization nanosheet according microscopic spectroscopic characterizations. Electronic communication shared among semiconductor shifts hybrid material optical features toward less energetic radiation but maintaining conductivity. Therefore, GA-TiO2...
The modelling of long-range ordered nanostructures is still a major issue for the scientific community. In this work, self-assembly redox-active tetra(N-methyl-4-pyridyl)-porphyrin cations (H2TMPyP) on an iodine-modified Au(100) electrode surface has been studied by means Cyclic Voltammetry (CV) and in-situ Electrochemical Scanning Tunneling Microscopy (EC-STM) with submolecular resolution. While CV measurements enable conclusions about charge state organic species, in particular,...