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Room Temperature Ethene to Propene (ETP) Tandem Catalysis using Single Crystalline Solid-State Molecular Pre-Catalysts.
Angew Chem Int Ed Engl
January 2025
University of York, Chemistry, Heslington, YO105DD, York, UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND.
A tandem catalytic ensemble of solid-state molecular organometallic (SMOM) crystalline pre-catalysts are deployed under batch or flow conditions for the ethene to propene process (ETP). These catalysts operate at ambient temperature and low pressure, via sequential ethene dimerization, butenes isomerization and cross-metathesis. Under flow conditions the on-stream ethene conversion (55%), initial propene selectivity (92%), stability (71% selectivity after 7 hrs) and low temperature/pressures are competitive with the best-in-class heterogenous systems, marking a new, in crystallo, approach to ETP.
View Article and Find Full Text PDFAntibacterial properties of elastomers modified with chitosan.
Acta Bioeng Biomech
June 2024
2AGH University of Krakow, Faculty of Materials Science and Ceramics, Kraków, Poland.
Bacterial infections pose a serious threat to human health. For many years, there has been a search for materials that would inhibit their development. It was decided to take a closer look at various elastomeric materials with the addition of chitosan.
View Article and Find Full Text PDFSynergistic effect of scattered rare metals on Pt/CeO for propane oxidative dehydrogenation with CO.
RSC Adv
January 2025
State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University (NPU), Shaanxi Joint Laboratory of Graphene Xi'an 710072 China
The oxidative dehydrogenation of propane with CO (CO-ODP) is a green industrial process for producing propene. Cerium oxide-supported platinum-based (Pt/CeO) catalysts exhibit remarkable reactivity toward propane and CO due to the unique delicate balance of C-H and C[double bond, length as m-dash]O bond activation. However, the simultaneous activation and cleavage of C-H, C-C, and C-O bonds on Pt/CeO-based catalysts may substantially impede the selective activation of C-H bonds during the CO-ODP process.
View Article and Find Full Text PDFGenerating Beta Zeolite Nanosheets of Intergrown Polymorph B and C Using Polycationic Structure-Directing Agent.
Small
January 2025
State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China.
Zeolitic nanosheets possess great potential in catalysis due to their enhanced transport property and accessibility toward bulky molecules compared to conventional micron- meter scale crystals. However, the generation of Beta zeolite nanosheets, which are crucial for industrial catalysis, is still challenging for its intergrowth nature. In this work, aluminosilicate Beta nanosheets of ca.
View Article and Find Full Text PDFFabricating a stable interface of tetracoordinated-phosphorus and framework Al within P-doping ZSM-5 zeolite for catalytic methanol-to-propylene reaction.
J Colloid Interface Sci
January 2025
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, PR China; Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials, Kunming 650500, PR China. Electronic address:
Phosphorus (P)-doping H-ZSM-5 zeolites, which is crucial for industrial applications, aim to adjust both acidity and framework stability while optimizing product distribution in heterogeneous catalysis. Nonetheless, current phosphating methods often suffer from inadequate phosphorus dispersion and unclear interfacial interactions with framework aluminum (Al). In this work, P-doping ZSM-5 zeolites were successfully one-step prepared by using tributylphosphine served as an organophosphorus precursor, assisting by density functional theory calculations.
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