A5004127604- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Catalysts for Methane Reforming
- Advanced Photocatalysis Techniques
- Electrocatalysts for Energy Conversion
- Catalysis and Hydrodesulfurization Studies
- Nanomaterials for catalytic reactions
- Advanced Materials Characterization Techniques
- Ammonia Synthesis and Nitrogen Reduction
- CO2 Reduction Techniques and Catalysts
- Carbon dioxide utilization in catalysis
- Metal-Organic Frameworks: Synthesis and Applications
- TiO2 Photocatalysis and Solar Cells
- Electronic and Structural Properties of Oxides
- Covalent Organic Framework Applications
- Catalysis for Biomass Conversion
- Machine Learning in Materials Science
- Zeolite Catalysis and Synthesis
- Carbon Dioxide Capture Technologies
- Enhanced Oil Recovery Techniques
- Nanoplatforms for cancer theranostics
- Copper-based nanomaterials and applications
- Advanced materials and composites
- Diamond and Carbon-based Materials Research
- Advanced Nanomaterials in Catalysis
Utrecht University
2018-2025
University of Trieste
2014-2023
National Interuniversity Consortium of Materials Science and Technology
2014-2018
Institute for the Chemistry of OrganoMetallic Compounds
2015-2017
Philadelphia University
2017
University of Pennsylvania
2017
Carbon dioxide is a desired feedstock for platform molecules, such as carbon monoxide or higher hydrocarbons, from which we will be able to make many different useful, value-added chemicals. Its catalytic hydrogenation over abundant metals requires the amalgamation of theoretical knowledge with materials design. Here leverage understanding structure sensitivity, along library supports, tune selectivity methanation in Power-to-Gas concept nickel. For example, show that nickel can and does...
Hydrogen is currently mainly produced via steam reforming of methane (SMR: CH4 + H2O → CO 3H2). An alternative to this process, utilizing carbon dioxide and thus potentially mitigating its environmentally harmful emissions, dry (DMR: CO2 2CO 2H2). Both these reactions are structure sensitive, that is, not all atoms in a catalytic metal nanoparticle have the same activity. Mapping sensitivity understanding mechanistic workings provides ways design better, more efficient, stable catalysts....
Abstract Transforming carbon dioxide into valuable chemicals and fuels, is a promising tool for environmental industrial purposes. Here, we present catalysts comprising of cobalt (oxide) nanoparticles stabilized on various support oxides hydrocarbon production from dioxide. We demonstrate that the activity selectivity can be tuned by selection oxide oxidation state. Modulated excitation (ME) diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) reveals follows...
Reducible supports can affect the performance of metal catalysts by formation suboxide overlayers upon reduction, a process referred to as strong metal-support interaction (SMSI). A combination operando electron microscopy and vibrational spectroscopy revealed that thin TiOx formed on nickel/titanium dioxide during 400°C reduction were completely removed under carbon hydrogenation conditions. Conversely, after 600°C exposure reaction conditions led only partial reexposure nickel, forming...
Carbon-supported, Pt and PtCo nanocrystals (NCs) with controlled size composition were synthesized examined for hydrodeoxygenation (HDO) of 5-hydroxymethylfurfural (HMF). Experiments in a continuous flow reactor 1-propanol solvent, at 120 to 160 °C 33 bar H2, demonstrated that reaction is sequential on both alloys, 2,5-dimethylfuran (DMF) formed as an intermediate product. However, the DMF greatly suppressed such Pt3Co2 catalyst achieved yields high 98%. XRD XAS data indicate consists...
This brief review is focused on recent advancements in methane catalytic oxidation, an important reaction for environmental remediation and clean power generation. Particular attention given to Pd‐based catalysts novel strategies gain a fundamental understanding of the mechanism improve activity stability Pd catalysts. The combined approaches exploiting nanostructured catalysts, operando spectroscopic microscopic measurements computational methods demonstrated.
Abstract The influence of water vapor on methane catalytic combustion was studied over a Pd@CeO 2 /Si‐Al O 3 catalyst, carefully designed to maximize Pd‐CeO interaction and prevent metal sintering compared conventional impregnated catalyst with identical chemical composition. Although the nanostructured is thermally stable, addition reaction feed leads transient deactivation at low temperatures, consistent well documented competitive adsorption. In this, hierarchically structured exhibits an...
The concept of self-regenerating or "smart" catalysts, developed to mitigate the problem supported metal particle coarsening in high-temperature applications, involves redispersing large particles by incorporating them into a perovskite-structured support under oxidizing conditions and then exsolving as small reducing conditions. Unfortunately, redispersion process does not appear work practice because surface areas perovskite supports are too low diffusion lengths for ions within bulk...
Advances in the synthesis of pure brookite and brookite-based TiO2 materials have opened way to fundamental applicative studies once least known polymorph. Brookite is now recognized as an active phase, some cases showing enhanced performance with respect anatase, rutile or their mixture. The peculiar structure determines its distinct electronic properties, such band gap, charge–carrier lifetime mobility, trapping sites, surface energetics, atom arrangements adsorption sites. Understanding...
Surface composition of the highly selective Ni–Cu catalysts was characterized by NAP-XPS under conditions relevant to HDO reaction.
Some fundamental concepts of catalysis are not fully explained but paramount importance for the development improved catalysts. An example is concept structure insensitive reactions, where surface-normalized activity does change with catalyst metal particle size. Here we explore this and its relation to surface reconstruction on a set silica-supported Ni nanoparticles (mean sizes 1-6 nm) by spectroscopically discerning sensitive (CO2 hydrogenation) from (ethene reaction. Using...
Nickel metal nanoparticles are intensively researched for the catalytic conversion of carbon dioxide. They commercially explored in so-called power-to-methane application which renewably resourced H2 reacts with CO2 to produce CH4, is better known as Sabatier reaction. Previous work has shown that this reaction structure-sensitive. For instance, Ni/SiO2 catalysts reveal a maximum performance when nickel ∼2–3 nm used. Particularly important understanding structure sensitivity over...
A thiophene-based donor-acceptor phenothiazine dye has been functionalized with a peripheral glucose unit (PTZ-GLU) to bust its affinity water and enhance dye-sensitized photogeneration of hydrogen. Compared the corresponding alkyl derivative (PTZ-ALK), as well common hydrophilic triethylene glycol substitution (PTZ-TEG), sugar shows lower contact angle; PTZ-GLU performed twice more efficient than PTZ-TEG in hydrogen terms evolved gas turnover number.
Dye-sensitized photocatalytic H2 generation has been investigated using a metal-free phenothiazine-based donor–acceptor sensitizer (PTZ-GLU) in combination with coadsorbents. The coadsorption of the PTZ-GLU dye, functionalized glucose end-group, glucose-based coadsorbent, afforded improved activity compared to absence coadsorbents, use conventional (chenodeoxycholic acid) or by replacing dye functionality an alkyl chain. results suggest strategic role directional intermolecular...
Production of molecular hydrogen (H2) is becoming an increasingly prominent process, due to high expectations as a new green energy carrier and key reagent for many industrial processes. Herein we report the efficiency H2 production via photoreforming ethanol using catalyst based on hierarchical carbon nanocones hybridised with inorganic layer nanocrystalline TiO2 containing Pd nanoparticles.
Cerium oxide (CeO2) nanoparticles (NPs) are used in polishing products and absorbents, as promoters wound healing, organopesticide decontaminants. While systemic bioaccumulation organ toxicity has been described after inhalation, data on CeO2 NPs’ transdermal permeation lacking. Our study was an vitro investigation of the 17-nm NPs dispersed synthetic sweat (1 g L−1) using excised human skin Franz cells. Experiments were performed intact needle-abraded skin, separately. The average amount Ce...