Showing papers in "Molecular Catalysis in 2018"

TL;DR: In this paper, the effects of Fe/Ag ratios and pretreatment atmosphere on the structure and catalytic activity for CO oxidation of Ag/Fe2O3 catalysts were investigated and it was found that rarefied oxygen environment in a muffle furnace was beneficial to the formation of small size Ag0 species and larger specific surface area, which could be due to the reductive gases produced by the decomposition of MIL-100(Fe) and nitrate.

TL;DR: In this paper, NH2-MIL-125(Ti)/TiO2 composites with different molar ratios were successfully prepared by a facile one-pot solvothermal method and used for visible-light driven photocatalytic selective oxidation of cyclohexane.

TL;DR: In this paper, a green magnetic nanocatalyst based on natural clay was fabricated and the morphology and chemistry of the Fe3O4@HNTs-PEI nanocomposite was fully characterized by Fourier transform infrared (FT-IR) spectroscopy spectra, field-emission scanning electron micrograph (FE-SEM) images, thermogravimetric analysis (TGA), energy-dispersive X-ray (EDX) analysis, XRD) pattern and vibrating sample magnetometer (VSM) curve analyses.

TL;DR: In this paper, the morphology effects on the activity and stability of nano-sheets (CM S), nano-particles (CM P) and nano-rods (CM R) were compared and investigated.

TL;DR: In this article, a facile strategy for the in-situ growth of Co-based oxide precursors with unique hierarchical architectures oriented aslant or perpendicular to the Ni surfaces was reported.

TL;DR: In this article, a novel Ni-Ce-Ti mixed oxide catalyst was developed for the selective catalytic reduction of NOx by NH3, which showed high NH3-SCR activity, excellent N2 selectivity with broad operation temperature window.

TL;DR: In this article, a metal-induced Z-scheme CdS/Ag/g-C3N4 photocatalyst was prepared for photocatalytic H2 evolution under visible light irradiation.

TL;DR: In this article, non-noble Cu supported on MgO-Al2O3 catalysts have been prepared by co-precipitation and have shown excellent catalytic performance for conversion of furfural to furfuryl alcohol in near-critical iso-propanol.

TL;DR: In this paper, the aerobic oxidation of bio-platform compound 5-hydroxymethylfurfural (HMF) to value-added 2,5-furandicarboxylic acid (FDCA) was studied over hydroxyapatite supported ruthenium (Ru/HAP) nanocatalyst without extra addition of soluble base.

TL;DR: In this article, the authors reported an oxidative desulfurization system for oxidation of sulfur-containing compounds in model oil and diesel by catalysis using SiO2-supported phosphomolybdate hybrid material with 30% H2O2 aqueous solution as the oxidant.

TL;DR: In this article, a new visible-light driven photocatalyst, carbon quantum dots (CQDs)/KNbO3 composite, is successfully prepared via hydrothermal and mixed-calcination methods.

TL;DR: In this article, Nanocrystalline MgO has been synthesized by simple precipitation method followed by calcination at 450 °C, which indicated the presence of mesoscopic void space and excellent catalytic activity for the synthesis of organic cyclic carbonates by chemical fixation of CO2 on a wide range of epoxides.

TL;DR: In this paper, a polymer supported Ni(II) catalyst was used for the hydrogenation of halonitrobenzene to haloaniline, avoiding the formation of hydro-dehalogenated sideproducts.

TL;DR: Mesoporous Ni/NiO catalyst was synthesized using an organosilane as a mesopore template as discussed by the authors for hydrogenation of glucose to sorbitol using N2 sorption, XRD, SEM, TEM, SQUID, and XPS techniques.

TL;DR: In this paper, the first systematic study of solvent effect on reductive amination of ketones with ammonia and dihydrogen (H2) over Ru/C, Rh/C and Pd/C catalysts was performed.

TL;DR: In this paper, deep eutectic solvents (DESs) based on (-)-menthol and fatty acids (octanoic, decanoic and dodecanoic acid) were investigated as reaction media for the lipase catalyzed esterification of the DES compounds itself to synthesize (--menthol fatty acid esters.

TL;DR: In this paper, an open metal site metal-organic framework of MIL-100(Cr) was selected as a support for the multi-step grafting of molybdenum complexes.

TL;DR: In this article, the entropy effects when bimolecular and unimolecular reactions are computed for processes occurring in solution are studied as a test case to reveal the entropy effect of catalytic reactions.

TL;DR: In this paper, a bimetallic catalytic system of Ru and Ni supported onto nitrogen-doped activated carbon (Ru-Ni-AC/N) was developed and its performances on hydrogenolysis of lignin model compounds under mild reaction conditions (1.0 MPa, 230°C, in aqueous) were investigated.

TL;DR: In this article, a Co-doped Mn-Ce mixed oxides (CoMC-0.25Mn0.75CeOδ) was synthesized using a co-precipitation method and the results demonstrated that a solid solution was formed with more active oxygen induced by Co doping.

TL;DR: In this article, the outstanding basicity of negative charged Lindqvist type polyoxoniobate K7HNb6O19·13H2O has been proved experimentally as well as by theoretical NBO calculations, the results reveal high electron density on terminal and bridging oxygen atoms of niobate anion.

TL;DR: In this article, the authors presented the design and synthesis of a polymer support sustainable heterogeneous [PS-Zn(II)L] catalyst from modified chloromethylated polystyrene, which showed its efficient catalytic activity towards the formation of organic cyclic carbonate from epoxides via CO2 fixation at room temperature under 1 atm CO2 pressure in solvent free condition.

TL;DR: In this article, a critical review outlines the close relationship and mutual interplay between molecular recognition, active site considerations in enzyme catalysis involving organocatalysis via hydrogen bonding, and the discovery and mechanistic elucidation of such reactions are likely to improve the understanding of enzyme active sites.

TL;DR: In this article, a series of gold-palladium catalysts supported in a mesoporous surface functionalized silica SBA-15 was studied for H2O2 direct synthesis.

TL;DR: In this article, a series of DBU-based ionic liquids (DILs) were synthesized via facile neutralization of superbase 1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) with corresponding hydrogen bond donor acids, such as D(−)-tartaric acid (TA), malic acid(MA) and succinic acid (SA).

TL;DR: In this paper, a series of short rod-like micro-mesoporous composite SBA-15 materials with developed porosity and enhanced mass transfer performance were rationally designed and synthesized, and highly dispersed and thermally stable Pd nanoparticles were successfully introduced into the mesopore channels of SBA15-r via an extraordinary incipient wetness impregnation with the assistance of furfuryl alcohol and trimethylbenzene.

TL;DR: In this article, a novel heterogeneous catalyst made of Ru nanoparticles (NPs) supported on N-doped hierarchically porous carbon from biomass, Ru/NHPC, was shown to be highly active, selective and stable in catalytic transformation from levulinic acid (LA) into γ-valerolactone (GVL).

TL;DR: In this paper, the structural and surface properties of the prepared Fe/ZSM-5 catalysts are characterized by solid-state NMR, XRD, N2 sorption, TEM, H2-TPR, NH3-TPD and XPS techniques, giving an insight into the active sites responsible for NH3 decomposition reaction.

TL;DR: In this paper, a facile approach for the preparation of nitrogen deficient g-C3N4 was developed by polymerization of urea with a small amount of formamide, which displays extended optical absorption and enhanced migration and separation of photogenerated charge carriers, which result in efficient photocatalytic hydrogen evolution.

TL;DR: In this article, a series of bismuth oxyfluoride/bistuth oxyiodide/graphene oxide (BiOmFn/BiOxIy/GO) nanocomposites with different GO contents were synthesized through a simple hydrothermal method.