A5003260084- Metal complexes synthesis and properties
- Catalytic Processes in Materials Science
- Electrocatalysts for Energy Conversion
- Advanced Chemical Physics Studies
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- CO2 Reduction Techniques and Catalysts
- Photochemistry and Electron Transfer Studies
- Organometallic Complex Synthesis and Catalysis
- TiO2 Photocatalysis and Solar Cells
- Hydrogen Storage and Materials
- Ionic liquids properties and applications
- Molecular Sensors and Ion Detection
- Machine Learning in Materials Science
- Synthetic Organic Chemistry Methods
- Catalysis and Hydrodesulfurization Studies
- Porphyrin and Phthalocyanine Chemistry
- Gas Sensing Nanomaterials and Sensors
- Mesoporous Materials and Catalysis
- Advanced Photocatalysis Techniques
- Asymmetric Hydrogenation and Catalysis
- Catalysts for Methane Reforming
- Luminescence and Fluorescent Materials
- Ferrocene Chemistry and Applications
- Lanthanide and Transition Metal Complexes
King Abdulaziz University
2017-2025
Ecole Nationale d'Ingénieurs de Monastir
2020
King Abdullah University of Science and Technology
2014-2016
Sorbonne Université
2010-2015
Laboratoire de Chimie Théorique
2010-2014
University of Carthage
2012
Centre National de la Recherche Scientifique
2010-2012
Institut Préparatoire aux Études d'Ingénieurs de Monastir
2010
The challenge in the electrochemical reduction of aqueous carbon dioxide is designing a highly selective, energy-efficient, and non-precious-metal electrocatalyst that minimizes competitive proton to form hydrogen during CO2 conversion. A non-noble metal based on copper-indium (Cu-In) alloy selectively converts CO with low overpotential reported. deposition In rough Cu surfaces led Cu-In surfaces. DFT calculations showed preferentially located edge sites rather than corner or flat d-electron...
We report a selective and stable electrocatalyst utilizing non-noble metals consisting of Cu Sn for the efficient reduction CO2 to CO over wide potential range. The bimetallic electrode was prepared through electrodeposition species on surface oxide-derived copper (OD-Cu). surface, when decorated with an optimal amount Sn, resulted in Faradaic efficiency (FE) greater than 90% current density −1.0 mA cm–2 at −0.6 V vs RHE, compared FE 63% −2.1 OD-Cu. Excess caused H2 evolution decreased...
Abstract The challenge in the electrochemical reduction of aqueous carbon dioxide is designing a highly selective, energy‐efficient, and non‐precious‐metal electrocatalyst that minimizes competitive proton to form hydrogen during CO 2 conversion. A non‐noble metal based on copper‐indium (Cu‐In) alloy selectively converts with low overpotential reported. deposition In rough Cu surfaces led Cu‐In surfaces. DFT calculations showed preferentially located edge sites rather than corner or flat...
Selective electrocatalytic CO<sub>2</sub>reduction was achieved using CuIn alloy synthesized from CuInO<sub>2</sub>.
Liquid organic chemical hydrides are effective hydrogen storage media for easy and safe transport. The couple of methylcyclohexane (MCH) toluene (TOL) has been considered one the feasible cycles a carrier, but selective dehydrogenation MCH to TOL reported using only Pt-based noble metal catalysts. This study reports supported NiZn as selective, non-noble-metal catalyst. A combined experimental computational was conducted provide insight into site requirements reaction mechanism TOL, which...
Methylcyclohexane (MCH)-toluene (TOL) chemical hydride cycles as hydrogen carrier systems are successful with the selective dehydrogenation of MCH to TOL, which has been achieved only using precious Pt-based catalysts. Herein, we report improved selectivity non-precious metal nickel-based bimetallic catalysts, where second occupies unselective step sites.
The article illustrates the design flexibility of tridentate ligands and resultant platinum complexes, highlighting impact this on anticancer potential.
The lack of availability efficient, selective, and stable electrocatalysts is a major hindrance to the scalability CO2 reduction processes. use Cu with Indium (In) Tin (Sn) form bimetallic composite electrocatalyst materials has been shown, from our pioneering work, greatly improve selectivity through changes in morphology electronic structure. Such were result suppression hydrogen evolution reaction (HER), whilst showing only slight weakening adsorption energy CO. Due mild poisoning active...
The lack of availability efficient, selective, and stable electrocatalysts is a major hindrance to the scalability CO2 reduction processes. use Cu with Indium (In) Tin (Sn) form bimetallic composite electrocatalyst materials has been shown, from our pioneering work, greatly improve selectivity through changes in morphology electronic structure. Such were result suppression hydrogen evolution reaction (HER), whilst showing only slight weakening adsorption energy CO. Due mild poisoning active...
We propose a theoretical model for photocatalytic processes on titanium dioxide, described by its most stable phase and surface, rutile-TiO2(110). The excitation induced light promotes electrons from the valence band to conduction band. In this context, one important requirement is having correct value of magnitude electronic gap. use GGA+U or LDA+U functional with an appropriate U allows this. correction has little consequence adsorption strength itself TiO2(110) surface. For ground state,...
Abstract A new donor-π-acceptor derived from phenothiazine, namely 2-(2-((10-hexyl-10H-phenothiazin-3-yl)methylene)-3-oxo-2,3-dihydroinden-1-ylidene) malononitrile (PTZON) was synthesized and fully characterized, its potential as a fluorescent sensor for cyanide anion investigated. The PTZON showed visible absorption band at 564 nm corresponds to an intramolecular charge transfer (ICT) emission 589 in CH 3 CN/H 2 O. results of titration revealed ratiometric changes both fluorescence spectra...
Three tridentate Schiff base ligands were synthesized from the reactions between 2-picolylamine and salicylaldehyde derivatives (3-ethoxy (OEt), 4-diethylamino (NEt 2 ) 4-hydroxy (OH)).
Graphene and other 2D materials have gained significant attention in the development of gas sensors. In this study, we employed Density Functional Theory (DFT) to investigate adsorption properties diazomethanes (1a-1g) with various functional groups (R = OH (a), OMe (b), OEt (c), OPr (d), CF3 (e), Ph (f)) on pristine graphene. Furthermore, explored behavior activated carbenes (2a-2g) generated from decomposition graphene, as well functionalized graphene derivatives (3a-3g) resulting [2 + 1]...
Reaction of triisobutylaluminum with SBA15700 at room temperature occurs by two parallel pathways involving either silanol or siloxane bridges. It leads to the formation a well-defined bipodal [([triple bond, length as m-dash]SiO)2Al-CH2CH(CH3)2] 1a, silicon isobutyl [[triple m-dash]Si-CH2CH(CH3)2] 1b and hydride m-dash]Si-H] 1c. Their structural identity was characterized FT-IR advanced solid-state NMR spectroscopies (1H, 13C, 29Si, 27Al 2D multiple quantum), elemental gas phase analysis,...
The well-defined single-site silica-supported hafniaaziridine complex [(≡Si–O−)Hf(η2,π-MeNCH2)(η1-NMe2)(η1-HNMe2)] was prepared using surface organometallic chemistry. Upon thermal treatment under high vacuum, the grafted species converted into unprecedented hafnium imido bis-amido [(≡Si–O−)Hf(═NMe)(η1-NMe2)]. complexes were characterized by elemental analysis and following spectroscopic techniques: infrared, solid-state single multiple quantum NMR, advanced DNP-SENS, extended X-ray...
The solar cell and light-emitting device research community is currently focusing on investigating two-dimensional (2D) hybrid perovskite materials owing to their remarkable stability intriguing optoelectronic characteristics, which hold significant promise for various applications. In general, the introduction of chirality in perovskites arises from symmetry breaking within inorganic frameworks. Nevertheless, despite this understanding, specific factors driving observed increase splitting...
The reaction of mesoporous silica (SBA15) dehydroxylated at 700 °C with diisobutylaluminum hydride, i-Bu2AlH, gives after thermal treatment a single-site tetrahedral aluminum hydride high selectivity. starting isobutyl and the final have been fully characterized by FT-IR, advanced SS NMR spectroscopy (1H, 13C, multiple quanta (MQ) 2D 1H–1H, 27Al), elemental analysis, while DFT calculations provide rationalization occurring reactivity. Trimeric i-Bu2AlH reacts selectively surface silanols...
This study provides a complete analysis of the electronic and photophysical properties of, derivative uracil, IsoOrotic (IOA) azo dyes. The ability dye to work as an excited state intramolecular proton transfer (ESIPT) was investigated by using Density Functional Theory (DFT) Time Dependent (TD-DFT) methods. effect electron-donating substituents (CH3 NMe2) electron-withdrawing one (NO2) examined. In addition, solvent polarity on ESIPT process is studied. All geometrical structures in singlet...
CO adsorption on iron clusters is studied using density functional theory. Both topologies and electronic structures are detailed. With increasing size, Fe tend to dissociate CO.