A5065180072- Mesoporous Materials and Catalysis
- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Radioactive element chemistry and processing
- Zeolite Catalysis and Synthesis
- Catalysts for Methane Reforming
- Carbon dioxide utilization in catalysis
- Electrocatalysts for Energy Conversion
- Metal-Organic Frameworks: Synthesis and Applications
- Chemical Synthesis and Reactions
- Advanced battery technologies research
- Polyoxometalates: Synthesis and Applications
- Metal Forming Simulation Techniques
- Chemical Synthesis and Analysis
- Multicomponent Synthesis of Heterocycles
- Asymmetric Hydrogenation and Catalysis
- Metallurgy and Material Forming
- Fuel Cells and Related Materials
- Laser and Thermal Forming Techniques
- Advanced Photocatalysis Techniques
- Sulfur-Based Synthesis Techniques
- Welding Techniques and Residual Stresses
- Nuclear materials and radiation effects
- Supercapacitor Materials and Fabrication
- Synthesis of Organic Compounds
Shell (Qatar)
2021-2024
Qatar Science and Technology Park
2021-2024
Agency for Science, Technology and Research
2022-2023
Singapore Institute of Manufacturing Technology
2022-2023
Shell (India)
2022
Banaras Hindu University
2014
Indian Institute of Chemical Technology
2006-2009
University of Vermont
2005-2007
Bhabha Atomic Research Centre
1999-2006
Sluggish kinetics of the anodic oxygen evolution reaction (OER) and minor upstream upsets in feed water quality remain bottlenecks for efficient electrolysis, which is exacerbated under near-neutral pH environments due to H2O dissociation. In this work, we report introduction a NiSx interlayer Co-(NiFe) oxide/nitride catalyst on nickel foam substrate. Postmortem OER characterization neutral synthetic seawater (SSW) shows that stable cationic [Co-(NiFe)]δ+ anionic [O-N]δ– surface species...
Using abundant seawater can reduce reliance on freshwater resources for hydrogen production from electrocatalytic water splitting. However, has detrimental effects the stability and activity of evolution reaction (HER) electrocatalysts under different pH conditions. In this work, we report synthesis binary metallic core-sheath nitride@oxynitride [Ni(ETM)]δ+-[O-N]δ-, where ETM is an early transition metal V or Cr. NiVN a nickel foam (NF) substrate, demonstrate HER overpotential as low 32 mV...
Green hydrogen presents itself as a clean energy vector, which can be produced by electrolysis of water utilizing renewable such solar or wind. While current technologies are sufficient to support commercial deployment fresh electrolyzers, there remain few well-defined challenges in the path commercializing direct seawater predominantly related sluggish oxygen evolution reaction (OER) kinetics and competing chlorine (CER) at anode. Herein, we report facile swift fabrication an S,B-codoped...
The room temperature, liquid-phase oxidation of 2-chloroethyl ethyl sulfide (CEES), an analogue mustard gas, was investigated using vanadium-doped acid-prepared mesoporous silica ("V−APMS") as a solid catalyst. V−APMS samples were prepared by wet impregnation with NH4VO3, followed calcination. XRD, N2 physisorption, SEM, and EPR used to characterize the products. Samples lower V contents (0.1−10 wt %) found contain isolated vanadyl species highly effective for CEES corresponding sulfoxide...
This study deals with the development and evaluation of lanthana promoted Cu-based catalysts for CO2 hydrogenation reaction. The samples were prepared using solution combustion synthesis method. demonstrates that incorporation 3wt% (La2O3) into a CuO/ZnO/Al2O3 results in catalyst exceptionally high catalytic performance. synthesized thoroughly characterized by various analytical tools such as HRTEM, XRD, XPS, H2-TPR, H2-TPD CO2-TPD. assessed reaction high-pressure fixed-bed reactor. La2O3...
Abstract To explore options for simple, safe, and compact chemical reactors that preserve wanted metastable initial products from sequential unwanted reactions, academic industrial researchers have tried to repurpose reciprocating piston equipment or an “engine-like” design be used as a reactor. Piston offer the benefit of achieving very high temperature pressure conditions at short defined residence times. Such promise enhanced performance several conversions. This paper provides review...
A new class of porous, mixed phase titanosilicate materials containing a microporous TS-1 and mesoporous Ti-MCM-48 has been successfully synthesized. novel, one-pot synthesis method was used in which the organic templates for phases were added sequentially to same reaction mixture, followed by crystallization at 150 °C. The gemini surfactant 18-12-18 form mesophase; subsequent addition tetrapropylammonium cation (TPA+) led formation TS-1. relative amounts two within final products controlled...
Abstract Higly efficient hydroarylation and hydroalkylation of styrenes with various arenes 1,3-dicarbonyl compounds respectively have been developed using Amberlyst-15 as a heterogeneous catalyst. The excellent yields, short reaction times, high selectivity are the advantages this method. C–H functionalization has achieved here under metal-free conditions.
This work investigates the effects of solution combustion synthesis (SCS) variables on performance copper-based catalysts for CO2 hydrogenation to methanol. The catalyst with a composition 30wt%CuO50%ZnO/Al2O3 was prepared at various glycine nitrates (G/O) ratios in range between 0.1 and 1.23. A correlation calcination activation temperatures catalytic activity also studied. synthesized G/O ratio 0.206, calcined air 400 °C activated stream pure hydrogen temperature 350 resulted significant...
MCM-48 samples containing uranium (U−MCM-48) to the extent of 1 6 wt % were synthesized hydrothermally and characterized using powder XRD, 29Si MAS NMR, FTIR spectroscopy, DR UV−Vis N2 sorption, TEM techniques. These analyses confirmed formation an ordered cubic-phase mesomaterial where existed in hexavalent state forming a local uranate type structure. A part uranyl groups found be incorporated framework positions, while rest anchored on wall host silica matrix. Also, U−MCM-48 exhibited...
Bi0.8La0.15RE0.05Fe0.9Mn0.1O3 (where RE = Pr and Nd) have been prepared via conventional solid state route. The Rietveld refinement of X-ray diffraction patterns shows that both systems crystallize in orthorhombic Pnma space group. Raman modes observed for these two indicate are very close to structure. Appearance prominent A1-3 weak E-2 Bi0.8La0.15Nd0.05Fe0.9Mn0.1O3 the presence chemically more active Bi-O covalent bonds (which favors stereochemical activity Bi lone pair electrons)...
Abstract The synthesis of 14‐aryl‐ or 14‐alkyl‐14 H ‐dibenzo[ a , j ]xanthenes 3 involving the treatment naphthalen‐2‐ol ( 1 ) with arenecarboxaldehydes alkanals 2 in presence HClO 4 ⋅SiO as heterogeneous catalyst was achieved Table ), and this reaction extended to preparation N ‐[(2‐hydroxynaphthalen‐1‐yl)methyl]amides 5 by three‐component urea 4a an amide 4b – d third reactant ).
Abstract Ethylene dimerization is an efficient industrial chemical process to produce 1‐butene, with demanding selectivity and activity requirements on new catalytic systems. Herein, a series of monodentate phosphinoamine‐nickel complexes immobilized UiO‐66 are described for ethylene dimerization. These catalysts display extensive molecular tunability the ligand similar organometallic catalysis, while maintaining high stability attributed metal–organic framework (MOF) scaffold. The highly...
CO2 capture and conversion to value-added products have seen continued advancement in recent years through electrochemical thermochemical routes. In this work, we adapted a facile potentially scalable reduction technique that directly reduces different-quality reduced graphene oxide (rGO) solids. Several characterization techniques been undertaken investigate the role of two- three-dimensional copper catalytic substrates, reaction time, humidity content on characteristics prepared rGO....
The paper presents a comparative study on the characteristics of uranium oxide crystallites deposited in mesopores MCM-41 by two different methods, one involving repeated cycles wet impregnation template-free with uranyl acetate and other way exchanging template cations an as-synthesized host matrix. XPS, DRUV visible XRD studies revealed that both preparation procedures resulted initial binding groups Si–OH sites matrix, part which converted to U3O8 particles upon calcination. size...