252 Results Found

The selective enhancement of catalytic activity is a challenging task, as catalyst modification is generally accompanied by both desirable and undesirable properties. For example, in the case of the direct synthesis of hydrogen peroxide, Pt on Pd imp...

Titania nanotubes (TNTs) impregnated with Pd and Pt nanoparticles are evaluated as heterogeneous catalysts in different conditions in two reactions: catalytic CO oxidation (gas phase, up to 500 °C) and H₂O₂ direct synthesis (liquid phase, 30 °C). The...

Infrared (IR) spectroscopy is among the most powerful spectroscopic techniques available for the morphological and physico-chemical characterization of catalytic systems, since it provides information on (i) the surface sites at an atomic level, (ii)...

In this study, we investigated the catalytic properties of mono- and bimetallic palladium (Pd) and platinum (Pt) nanoparticles deposited via supercritical fluid reactive deposition (SFRD) on titanium dioxide (TiO₂) powder. Transmission electron micro...

Hydrogen peroxide (H₂O₂) is an important industrial chemical that is widely applied in many areas. The direct synthesis of H₂O₂ from H₂ and O₂ has proved to be a green and economic pathway. Pd-based bimetallic catalysts, due to their superior catalyt...

With a focus on catalysts prepared by an excess-chloride wet impregnation procedure and supported on the zeolite ZSM-5(30), the introduction of low concentrations of tertiary base metals, in particular Cu, into supported AuPd nanoparticles can be obs...

The regulation of the interaction between H₂O₂ and its catalysts is a promising route to achieve high productivity and selectivity towards H₂O₂. Herein, mesoporous anatase/TiO₂(B) whisker (mb-TiO₂) modified with heterogeneous carbon was prepared as t...

Hydrogen peroxide (H₂O₂), as a clean and green oxidant, is widely used in many fields. The direct synthesis of H₂O₂ (DSHP) from H₂ and O₂ has attracted most research interest because it relates to a facile, environmentally friendly, and economic proc...

We have studied the direct synthesis of hydrogen peroxide using a catalytic system consisting of palladium supported on silica bifunctionalized with sulfonic acid groups and bromide in the absence of acid and halide promoters in solution. Catalysts w...

The focus of this work is on the relationship between the quantitative structural characterization of bimetallic Au-Pd nanoparticles dispersed in an amorphous polymer matrix and their catalytic activity in the direct synthesis of hydrogen peroxide (D...

The performance of bifunctional hybrid catalysts based on phosphotungstic acid (H₃PW₁₂O₄₀, HPW) supported on TiO₂ combined with a Cu-ZnO(Al) catalyst in the direct synthesis of dimethyl ether (DME) from syngas has been investigated. In this work, dif...

The performance of bifunctional hybrid catalysts based on phosphotungstic acid (H₃PW₁₂O₄₀, HPW) supported on TiO₂ combined with Cu-ZnO(Al) catalyst in the direct synthesis of dimethyl ether (DME) from syngas has been investigated. We studied the effe...

Rechargeable metal-ion batteries (RMIBs) are prospective highly effective and low-cost devices for energy storage. Prussian blue analogues (PBAs) have become a subject of significant interest for commercial applications owing to their exceptional spe...

The process of Fischer–Tropsch synthesis is commonly described as a series of reactions in which CO and H₂ are dissociated and adsorbed on the metals and then rearranged to produce hydrocarbons and H₂O. However, CO dissociation adsorption is re...

Hydrogen peroxide (H₂O₂) is a chemical which has gained wide importance in several industrial and research fields. Its mass production is mostly performed by the anthraquinone (AQ) oxidation reaction, leading to high energy consumption and significan...

A tripodal anion receptor has been obtained by an easy and fast single-reaction synthesis from commercial reagents. The three ligand arms-bearing aromatic groups able to form anion–π interactions define ligand clefts where large anions, such...

Layered silicates with a montmorillonite structure are widely used in various fields related to adsorption, gas and water treatment, catalysis, cosmetology and medicine. Under conditions of directed hydrothermal synthesis, montmorillonites with the s...

A new synthetic method for the synthesis of C-substituted [RC(O)CH₂-CB₁₁H₁₁]⁻ carborate anions has been developed. The reaction of [closo-B₁₁H₁₁]²⁻ with terminal alkynes in the presence of a copper catalyst leads to insertion into the bor...

The synthesis, crystal structures, and luminescence of two lanthanide polynuclear complexes with the general formula [Ln₂(tda)₃(H₂O)₅]·3H₂O (Ln = Sm, Eu; tda = thiodiacetato anion) are reported. The compounds were obtained by direct reaction o...

ZnO nanoparticles in a spherical-like structure were synthesized via filtration and calcination methods, and different amounts of ZnO nanoparticles were added to MgH₂ via ball milling. The SEM images revealed that the size of the composites was about...

Coordination complexes play a crucial role in modern research. 4-benzopyranone-2-carboxylic acid is a fascinating class of molecules with numerous applications, including the synthesis of pharmaceuticals and valuable chiral compounds. Antibacterial a...

CeO₂ is a crucial functional material in catalysis and energy applications, whose performance is highly morphology-dependent. Traditional synthesis methods often rely on organic templates or surfactants, which complicate the processes and pose enviro...

NaV₂O₅ mesocrystals were successfully synthesized from an alkaline-stripped pentavalent vanadium solution through a novel hydrothermal hydrogen reduction process. The optimal conditions for the hydrogen partial pressure, reaction temperature, initial...

Layered 2D zeolite MCM-22 and its delaminated derivative, ITQ-2, were modified with iron, by different methods (ion-exchange and direct synthesis), and with the use of different precursors (FeSO₄∙7H₂O, Fe(NO₃)₃∙9H₂O, and [Fe₃(OCOCH₃)₇∙OH∙2H₂O]NO₃ oli...

Enclosed nanoscale volumes, i.e., confined spaces, represent a fascinating playground for the controlled synthesis of inorganic materials, albeit their role in determining the synthetic outcome is currently not fully understood. Herein, we address th...

The development of efficient synthetic procedures to access fused N, O-heterocyclic skeletons has been a pivotal research topic in organic synthesis for several years. Owing to the applications of N, O-fused heterocycles in organic synthesis, materia...

The synthesis, crystal structure, phase transformations, and thermal expansion of (Y_1−xEu_x)₂(SO₄)₃*8H₂O (where x = 0, 0.17, 0.33, 0.50, 0.66, 0.83, and 1) are presented. (Y_1−xEu_x)₂(SO₄)₃*8H₂O solid solutions were synthesized via crystalli...

Hydrogen peroxide (H₂O₂) is one of the most environmentally friendly and versatile chemical oxidizing agents, with only O₂ and H₂O as reaction products. It is widely used in environmental protection, industrial production, and medical fields. At pres...

Conventionally, methanol is derived from a petroleum base and natural gas, but biomethanol is obtained from biobased sources, which can provide a good alternative for commercial methanol synthesis. The fermentation of molasses to produce biomethanol...

Herein, we present the synthesis and structural characterisation of two layered MOFs with the asymmetric ligand 3-chloro,6-cyano-2,5-dihydroxy-1,4-benzoquinone dianion (C₆O₄(CN)Cl²⁻ = chlorocyananilato). These compounds, formulated as (H₃O)[Eu(...

This work reports the preparation of La₂O₃ uniformly doped Mo nanopowders with the particle sizes of 40–70 nm by solution combustion synthesis and subsequent hydrogen reduction (SCSHR). To reach this aim, the foam-like MoO₂ precursors (20&ndash...

The manufacturing of technical catalysts generally involves a sequence of different process steps, of which co-precipitation is one of the most important. In this study, we investigate how continuous co-precipitation influences the properties of Cu/Z...

The direct synthesis of dimethyl ether (DME) is an ideal process to achieve the environmental objective of CO₂ conversion together with the economic objective of DME production. The effect of the reaction conditions (temperature, pressure, space time...

Human mesenchymal stem cell (hMSC) and extracellular vesicle (EV) therapy is a promising treatment for discogenic low back pain (LBP). Although promising, major obstacles remain to be overcome. Cellular senescence reduces self-renewal and multipotent...

Luminescent, heterometallic terbium(III)–lutetium(III) terephthalate metal-organic frameworks (MOFs) were synthesized via direct reaction between aqueous solutions of disodium terephthalate and nitrates of corresponding lanthanides by using two...

A series of hierarchical H-MOR zeolites with different pore structure were designed and synthesized by alkaline and alkaline-acid post-synthesis methods. The catalytic performance of hierarchical H-MOR zeolite-supported vanadium oxide was investigate...

A convenient and general method for the synthesis in 26–73% yields of a new series of 7-alkyl(aryl/heteroaryl)-2-amino-5-trifluoromethyl-1,8-naphthyridines from direct cyclocondensation reactions of 4-alkoxy-1,1,1-trifluoroalk-3-en-2-ones [CF₃C(O)CH=...

SnS/N-doped graphene (SnS/NG) composites are promising anode materials for sodium ion batteries. Generally, SnS is synthesized from SnCl₂·2H₂O. However, SnCl₂·2H₂O is not suitable for large-scale production due to its high price. Compar...

A new effective method is proposed to prepare vanadium nitride (VN) via carbothermal reduction–nitridation (CRN) of the precursor, obtained by adding carbon black (C) to the stripping solution during the vanadium recovery from black shale. VN was suc...

Metal oxide semiconductor-based photocatalysis and advanced oxidation processes (AOPs) are effective in treating various recalcitrant pollutants such as organic dyes present in industrial wastewater streams. AOPs rely on the highly reactive hydroxyl...

The synthesis of bulk pure Co₃O₄ catalysts by different routes has been examined in order to obtain highly active catalysts for lean methane combustion. Thus, eight synthesis methodologies, which were selected based on their relatively low complexity...

The direct transition-metal-catalyzed addition of C–H bonds to unsaturated C=X (X=C, O, and N) bonds via C–H bond activation has been recognized as a powerful tool for the construction of C–C bonds (in terms of atom and step economy...

The advantages of new types of H₂TiO₃ lithium-ion sieves, including excellent adsorption performance, high-efficiency Li⁺-ion selectivity, reliable regeneration, environmental friendliness, and easy preparation, have attracted considerable attention....

The reaction time, temperature, ratio of precursors, and concentration of sodium citrate are known as the main factors that affect the direct synthesis process of SiO₂@Au based on the chemical reaction of HAuCl4 and sodium citrate. Hence, we investig...

Dibenzoxazepinones exhibit unique biological activities and serve as building blocks for synthesizing pharmaceutical compounds. Despite remarkable advancements in organic chemistry and recent developments in synthetic approaches to dibenzoxazepinone...

A straightforward one-pot route for the synthesis of a new 4-phenyl-1,2,5,6-tetraazafluoranthen-3(2H)-one is reported form the direct hydrazinolysis of triketo ester and hydrazine hydrate in ethanol. 4-Phenyl-1,2,5,6-tetraazafluoranthen-3(2H)-one was...

An in-situ dehydrating system built in a continuous flow fixed-bed bubbling reactor for direct synthesis of dimethyl carbonate (DMC) was designed. 3A molecular sieve (MS) was selected as the ideal dehydrating agent and the water trapping efficiency w...

A fundamental understanding of the precise reduction reaction pathway of cobalt-based catalysts is a crucial piece of knowledge in terms of the Fischer–Tropsch Synthesis (FTS) reaction. The use of hydrogen (H₂) as the reduction agent results in...

In the present Short Note, we report a synthesis for the title compound, N-(9,10-dioxo-9,10-dihydroanthracen-1-yl)-2-methylbenzamide by reacting 2-methylbenzoyl chloride (or 2-methylbenzoic acid) with 1-aminoanthraquinone. The synthesized target comp...

The synthesis, structure and some properties of the one-dimensional coordination polymer, [Pr₂(pdc)₃(Hpdc)]_n·n(H3hp)·8n(H₂O), (H₂pdc = pyridine 2,6-dicarboxylic acid, C₇H₅NO₄; 3hp = 3-hydroxypyridine, C₅H₅NO) are described. One of the Pr³⁺ ions is co...