A5067194674- Zeolite Catalysis and Synthesis
- Mesoporous Materials and Catalysis
- Chemical Synthesis and Characterization
- Metal-Organic Frameworks: Synthesis and Applications
- Catalysis for Biomass Conversion
- Catalytic Processes in Materials Science
- Advanced NMR Techniques and Applications
- Catalysis and Hydrodesulfurization Studies
- Chemical Synthesis and Reactions
- Catalysis and Oxidation Reactions
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Magnetism in coordination complexes
- Polyoxometalates: Synthesis and Applications
- Nanomaterials for catalytic reactions
- Chemical Synthesis and Analysis
- Catalytic Cross-Coupling Reactions
- Covalent Organic Framework Applications
- Layered Double Hydroxides Synthesis and Applications
- Advanced Photocatalysis Techniques
- Ammonia Synthesis and Nitrogen Reduction
- Oxidative Organic Chemistry Reactions
- Catalytic C–H Functionalization Methods
- MXene and MAX Phase Materials
- Crystal Structures and Properties
BASF (Germany)
2020-2024
BASF (United States)
2022-2024
Robert Bosch (Germany)
2024
KU Leuven
2011-2021
University of Oxford
2017-2020
Institute of Catalysis and Petrochemistry
2014
The synthesis of titanium-carboxylate metal-organic frameworks (MOFs) is hampered by the high reactivity commonly employed alkoxide precursors. Herein, we present an innovative approach to titanium-based MOFs use titanocene dichloride synthesize COK-69, first breathing Ti MOF, which built up from trans-1,4-cyclohexanedicarboxylate linkers and unprecedented [Ti(IV)3(μ3-O)(O)2(COO)6] cluster. photoactive properties COK-69 were investigated in depth proton-coupled electron-transfer experiments,...
Silica-supported catalysts for the conversion of ethanol to 1,3-butadiene were investigated. The combination Hf(IV) and Zn(II) resulted in a stable, active, selective catalyst which effectively suppressed dehydration activity Hf(IV); preparation method plays crucial role. Using crystalline Zn-silicate hemimorphite as an alternative source proved be even more successful suppressing dehydration.
Although titanosilicalite-1 (TS-1) is among the most successful oxidation catalysts used in industry, its active site structure still debated. Recent efforts have mostly focused on understanding role of defect sites and extraframework Ti. Here, we report 47/49Ti signature TS-1 molecular analogues [Ti(OTBOS)4] [Ti(OTBOS)3(OiPr)] using novel MAS CryoProbe to enhance sensitivity. While dehydrated displays chemical shifts similar those homologues, confirming tetrahedral environment Ti consistent...
The selective decomposition of structural nitrate anions in alkaline earth MOFs generates highly dispersed base sites with catalytic applications.
Structural analysis and catalytic testing revealed that zeolite Beta from template-free synthesis introduces new possibilities in catalysis, as a result of its unprecedentedly high density active sites with exceptional stability distinctively ordered nature. Highly selective catalysts were obtained either by using it the Al-rich form (e.g. alkylation) or after post-synthesis treatments acylation). Such versatility made possible this novel route constitutes toolbox for catalysis.
The hydrous layer silicate RUB-36, (C6H16N)4 [H4Si36O76], has been used for an interlayer expansion reaction with dichlorodimethylsilane to interconnect neighboring ferrierite-type layers a three-dimensional framework silicate. linker group (−O–Si(CH3)2–O−) still the two methyl groups in as-synthesized form (material name COE-3 [Si20O38(CH3)4] framework) rendering hydrophobic properties. expanded zeolite, IEZ, is thermally stable and can be calcined at 550 °C yield hydrophilic material COE-4...
A robust catalyst that can continuously and effectively produce methanol from methane is exceedingly desired. Cu-containing zeolite catalysts were widely used in direct oxidative to reactions, the local structure of Cu species was one key factors influence reaction performance. It has been considered dicopper a highly active species, its implementation thoroughly dependent on Al pairs framework. Therefore, obtain effective Cu-exchanged AEI catalyst, synthesis with high proportion an...
Germanosilicate zeolites with various structures have been extensively synthesized, but the syntheses of corresponding zeolite in absence germanium species remain a challenge. One such example is an ITR structure, which twin ITH structure. Through modification classic organic template for synthesizing and thus designing new high compatibility to assisted by theoretical simulation, we, first time, show Ge-free synthesis structure including pure silica, aluminosilicate, borosilicate zeolites....
Zn-Co double metal cyanides (DMCs) were dispersed on silica by dry and liquid-assisted (LAG) grinding to improve the catalytic performance of DMC phase. The characterization resulting materials transmission electron microscopy, N2 physisorption, powder X-ray diffraction indicated that presence water during step, not only helped preserve structural textural properties DMC, but also facilitated dispersion active phase onto support. accessibility Lewis acid sites was increased, as evidenced...
There are a large number of zeolites, such as ITH, that cannot be prepared in the aluminosilicate form. Now, successful synthesis ITH zeolite using simple cationic oligomer an organic template is presented. Key to success has strong complexation ability with aluminum species combined structural directing for structure similar conventional template. The very high crystallinity, nanosheet-like crystal morphology, surface area, fully four-coordinated Al species, and abundant acidic sites....
Abstract The oxidative decarboxylation of amino acids to nitriles was achieved in aqueous solution by situ halide oxidation using catalytic amounts tungstate exchanged on a [Ni,Al] layered double hydroxide (LDH), NH 4 Br, and H 2 O as the terminal oxidant. Both were facilitated proximity effects between reactants LDH catalyst. A wide range converted with high yields, often >90 %. nitrile selectivity excellent, system is compatible amide, alcohol, particular carboxylic acid, amine,...
A new, layered double metal cyanide phase proved to be a reusable, stable and highly active catalyst in two important DMC applications.
Abstract With the increasingly stringent restrictions on engine exhaust gases, efforts to enhance activity, hydrothermal stability, and SO 2 ‐tolerance of NH 3 ‐SCR catalysts are highly desirable challenging. Here, we present concept controlled sitings metal active sites by modifying Cu‐SSZ‐39 with yttrium (Y) as rare‐earth for enhanced performances. Cu(0.25)‐Y(0.12)‐AEI(10) shows superior NO x conversion even after harsh aging at 900 °C, conditions under which standard Cu‐AEI cannot...
M<sup>1</sup>[Co(CN)<sub>6</sub>]<sub>2/3</sub>-type Prussian blue analogues (M<sup>1</sup>–Co PBAs) were studied as catalysts for the synthesis of propargylamines <italic>via</italic> A<sup>3</sup> coupling phenylacetylene, benzaldehyde and piperidine.
The synthesis of titanium-containing zeolite Beta was first published in this journal 1992 and has since proven to be groundbreaking the development large pore zeolites as heterogeneous catalysts with isolated Lewis acid sites. In Viewpoint we will illustrate its significance for oxidation chemistry catalyst design.
Interlayer expansion of the layered zeolite precursor RUB-36 in presence an Fe source simultaneously achieved and introduction catalytic activity.
A ferrierite-type layered aluminosilicate, Al-RUB-36, was prepared for the first time and its interlayer expansion resulted in new zeolite catalysts denoted Al-COE-3 Al-COE-4. Decane hydroconversion tests demonstrated highly active shape-selective nature of Al-COE-4 catalyst with an unprecedented isomerization yield, highlighting potential this material as a hydroisomerization catalyst. This is report on achieving shape-selectivity via expansion.
The applicability of Ag-exchanged zeolites as efficient phosphors for the development near ultra-violet primary LEDs is described.
The occurrence of metal ion exchange in Zn3[Co(CN)6]2 and Cu3[Co(CN)6]2 Prussian blue analogues (Zn-Co Cu-Co PBAs) was demonstrated for the first time. While Cu(ii) easily occurs Zn-Co PBA, atoms PBA by Zn(ii) proved to be more difficult. At low medium loadings, catalytic activity exchanged PBAs A3 coupling reaction benzaldehyde, piperidine phenylacetylene higher than that bimetallic multi similar composition prepared co-precipitation. This result showcases benefits process as a preparation...
Abstract The synthesis of titanium–carboxylate metal–organic frameworks (MOFs) is hampered by the high reactivity commonly employed alkoxide precursors. Herein, we present an innovative approach to titanium‐based MOFs use titanocene dichloride synthesize COK‐69, first breathing Ti MOF, which built up from trans ‐1,4‐cyclohexanedicarboxylate linkers and unprecedented [Ti IV 3 (μ ‐O)(O) 2 (COO) 6 ] cluster. photoactive properties COK‐69 were investigated in depth proton‐coupled...