A5103189454- Catalytic Processes in Materials Science
- Catalysts for Methane Reforming
- Catalysis and Oxidation Reactions
- Catalytic C–H Functionalization Methods
- Zeolite Catalysis and Synthesis
- Sulfur-Based Synthesis Techniques
- Catalytic Alkyne Reactions
- Carbon dioxide utilization in catalysis
- Catalysis and Hydrodesulfurization Studies
- Advanced Photocatalysis Techniques
- CO2 Reduction Techniques and Catalysts
- Electrocatalysts for Energy Conversion
- Carbohydrate Chemistry and Synthesis
- Chemical Synthesis and Analysis
- Organophosphorus compounds synthesis
- Ammonia Synthesis and Nitrogen Reduction
- Electrodeposition and Electroless Coatings
- ZnO doping and properties
- Lignin and Wood Chemistry
- Perovskite Materials and Applications
- Radical Photochemical Reactions
- Advanced Cellulose Research Studies
- Synthesis and Biological Activity
- Cyclopropane Reaction Mechanisms
- Algebraic structures and combinatorial models
Xihua University
2024
Shanghai Research Institute of Chemical Industry
2018-2024
Sinopec (China)
2017-2022
Chongqing Technology and Business University
2021-2022
Jinan University
2020
Fudan University
2008-2014
Chinese Academy of Sciences
2009
University of Hong Kong
2000
Peking University
2000
Abstract Direct synthesis of light olefins from syngas (STO) using a bifunctional catalyst composed oxide and zeolite has attracted extensive attention in both academia industry. It is highly desirable to develop robust catalysts that could enhance the CO conversion while simultaneously maintain high selectivity C2-C4 olefins. Herein, we report consisting ZnCr binary (ZnCrO x ) low-Si AlPO-18 zeolite, showing satisfying 45.0% (86.7%, 2 free) olefin/paraffin ratio 29.9 at 25.2% under mild...
Abstract The direct synthesis of light olefins from syngas over a bifunctional catalyst containing an oxide and zeolite has been proven to be promising strategy. Nevertheless, unclear reaction network hinders any further enhancement in catalytic performance, such as increasing the conversion CO. We herein report novel composed InZr binary SAPO‐34 displaying superior CO (27.7 %) with selectivity (73.6 at 400 °C, 2.0 MPa. demonstrate that Zr‐doped body‐centered cubic In 2 O 3 phase, exhibiting...
Palladium-catalyzed tandem reactions of 2-alkenylphenyl-acetylenes with CuCl2 or CuBr2 afforded 3-chloro- 3-bromo-1-methyleneindenes in good yields; these compounds could be further elaborated via palladium-catalyzed coupling reactions.
One-step conversion of syngas to aromatics (STA) over an oxide–zeolite bifunctional catalyst is promising as alternative route for aromatic production. Control distribution and enhancement benzene, toluene, xylene (BTX) selectivity are still a big challenge. Decoupling the complex reaction network, relative activity aromatization alkylation on ZSM-5 determines distribution. Herein, STA was studied Cr2O3/ZSM-5 reveal influence zeolite morphology parameters Using "substitution ratio ring"...
Abstract Catalytic dehydration of D ‐fructose to 5‐hydroxymethylfurfural (HMF) was investigated over a series Nafion‐modified mesocellular silica foam (MCF) materials. By using an impregnation method, Nafion resin highly dispersed in the ultra‐large pores MCFs. Highly efficient and selective HMF achieved dimethyl sulfoxide solvent; 89.3 % yield with 95.0 selectivity obtained presence Nafion(15)/MCF catalyst. The effects reaction temperature, time, solvent on were systematically investigated....
Controlling the formation, diffusion, and conversion of bridging intermediate is important for improving performance a tandem reaction over multi-component catalyst. However, it remains highly challenging because random distribution catalytic components via conventional mechanical combination usually endows nondirectional resulting in an obvious decrease performance. Here, we report recrystallization methodology dealing with extruded Cr2O3/ZSM-5 bifunctional catalyst to distribute oxide on...
The catalytic N2O decomposition was investigated over a series of NiCe mixed oxides. Characterizations XRD, N2-adsorption, SEM, XPS, and H2-TPR were applied to correlate their properties with the corresponding performance. catalyst Ni90Ce10 prepared by citrate acid method exhibited highest activity among oxides, which could completely decompose at 400 °C in presence oxygen. introduction CeO2 prevent agglomeration NiO preserve high surface area. A strong interaction between observed oxides;...
Abstract Activated carbon‐supported Mo‐Co‐K sulfide catalysts, prepared by stepwise impregnation, were used in the synthesis of higher alcohols via CO 2 hydrogenation. The catalysts with varying Mo contents and defined K/Mo Co/Mo molar ratios exhibited relatively high conversions selectivity to total C 2+ alcohols. Moreover, influence calcination conditions on sulfidation states catalytic performance was studied. surface sulfur runoff supported can be effectively suppressed online...
The migration of bridging intermediates (methanol) from oxides to zeolites is crucial in the direct conversion syngas light olefins via tandem process. As initiation step this migration, adsorption and desorption effect methanol on oxide components remains elusive. Herein, we systematically compared catalytic performances a series ZnAlOx with different Zn/Al ratios corresponding bi-component catalysts integrated AlPO-18 zeolite component. structures surface acidity were characterized by...
Direct conversion of syngas to light olefins using bifunctional catalysts containing both oxides and zeolites represents a promising alternative in comparison with Fischer-Tropsch synthesis. It is still great challenge achieve highly selective production ethylene propylene at satisfying CO for potentially industrial applications. Here, we report that high selectivity can be achieved by tailoring silicoaluminophosphate zeolite structure acid site strength. By comparing composed ZnCr oxide...
The development of the global economy leads to a rising demand for light olefins, which are basic chemical raw materials. Recently, series bifunctional catalysts consisting metal oxide and zeolite have been reported perform excellent olefin selectivity from syngas attract much attention. In this article, new sulfide (MoS2)–zeolite (SAPO-34) composite catalyst was studied conversion olefins. It found that side reaction methanation hydrogenation olefins paraffins suppressed by introduction...
Tandem addition-cyclization reactions of 2-alkynylbenzenamines with isocyanates catalyzed by palladium chloride are described. This reaction is performed in the presence 10 mol% THF at 80 degrees C, which provides an efficient and practical route for synthesis 1,2-disubstituted indoles.
Constructing stable, efficient and cost-effective cocatalysts is of great significance for photocatalytic H 2 evolution in a dye-sensitization system.
FTIR spectroscopy and thermal analysis were applied to study the nylon 6–lithium salt systems. The DTA results show that lithium ions cause a significant reduction of melting point nylon–lithium samples. In addition, salts can also prevent crystallization molten in cooling process. Temperature-variable demonstrates stronger hydrogen bonds form when halide is molten. Such systems may account for delaying amorphous nylon. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 2685–2690,
Direct synthesis of aromatics from syngas (STA) over an oxide–zeolite bifunctional catalyst is promising as a petroleum alternative route. Aromatics space-time yield (STY) key parameter for measuring the production capacity in industrial process. However, it still great challenge to achieve high STY applications. Herein, we synthesized series CeMnOx catalysts with self-cleaning effect. The structures and reduction process were thoroughly characterized by X-ray absorption fine structure situ...
The high cost of Pt-based catalysts impedes the practical large-scale commercial application fuel cells. Controlling morphology Pt nanostructure is one most promising approaches to promote electrocatalytical activity and stability toward methanol oxidation reaction (MOR) oxygen reduction (ORR). Herein, we report a facile method for synthesis nanodendrites consisting dense array dendrites using K2PtCl4 as metal resource, L-ascorbic acid reducing agent hexadecyltrimethylammonium chloride...