A5070144089- Zeolite Catalysis and Synthesis
- Advanced NMR Techniques and Applications
- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Nanomaterials for catalytic reactions
- Seismic Waves and Analysis
- Methane Hydrates and Related Phenomena
- Chemical Synthesis and Characterization
- Catalysis and Hydrodesulfurization Studies
- Earthquake Detection and Analysis
- Advanced Battery Materials and Technologies
- Mesoporous Materials and Catalysis
- Ammonia Synthesis and Nitrogen Reduction
- Catalysts for Methane Reforming
- Advanced Condensed Matter Physics
- Advancements in Battery Materials
- Electrocatalysts for Energy Conversion
- Asymmetric Hydrogenation and Catalysis
- Catalysis for Biomass Conversion
- NMR spectroscopy and applications
- Metal-Organic Frameworks: Synthesis and Applications
- Muon and positron interactions and applications
- Solid-state spectroscopy and crystallography
- Advanced battery technologies research
- Covalent Organic Framework Applications
Zhejiang Normal University
2022-2025
Dalian Institute of Chemical Physics
2011-2024
Chinese Academy of Sciences
2011-2024
Dalian National Laboratory for Clean Energy
2020-2024
Collaborative Innovation Center of Chemistry for Energy Materials
2014-2023
University of Chinese Academy of Sciences
2023
Dalian University
2016-2022
Dalian University of Technology
2016-2022
Xingtai University
2021
University of Jinan
2021
Oxidative dehydrogenation (ODH) of light alkanes catalyzed by metal oxides is considered to be a thermodynamically favorable process for olefin production. The strong interaction between the unoccupied d-orbital atom and π-electrons olefins, however, leads deep oxidation CO2, especially at elevated temperatures. challenge lies in development selective low-temperature active catalysts avoid such unwanted oxidation. Here, we report unambiguous evidence on properly prepared mesoporous...
Calcium-metal batteries (CMBs) provide a promising option for high-energy and cost-effective energy-storage technology beyond the current state-of-the-art lithium-ion batteries. Nevertheless, development of room-temperature CMBs is significantly impeded by poor reversibility short lifespan calcium-metal anode. A solvation manipulation strategy reported to improve plating/stripping anodes enhancing desolvation kinetics calcium ions in electrolyte. The introduction lithium salt changes...
Five-coordinated Als (Al(V)) on the surface of aluminas play important roles when they are used as catalysts or catalyst supports. However, comprehensive characterization and understanding intrinsic structural properties Al(V) remain a challenge, due to very small amount in commonly aluminas. Herein, structures γ-Al2O3 Al(V)-rich Al2O3 nanosheets (Al2O3-NS) have been investigated compared detail by multinuclear high-field solid-state NMR. Thanks high resolution sensitivity ultra-high-field...
PtFe catalysts have demonstrated their unique properties in the hydrogenation of carbonyl compounds, but promotion effect Fe is still under debate. Herein, a series Pt/Fe-TiO2 with controllable dispersion and similar Pt particle size were prepared as model to elucidate role selective furfural furfuryl alcohol. The catalytic data suggest that states significantly affect performance dispersed oligomers ca. 20-fold more active than Pt/TiO2. combined results reaction kinetic analysis...
Rare-earth Y exchanged Al-rich Cu-CHA shows significantly improved hydrothermal stability in NH<sub>3</sub>-SCR reaction.
The reaction mechanism of solid-acid-catalyzed phenol alkylation with cyclohexanol and cyclohexene in the apolar solvent decalin has been studied using situ 13C MAS NMR spectroscopy. Phenol sets only after a majority is dehydrated to cyclohexene. As show similar adsorption strength, this strict sequence not caused by limited access cyclohexanol, but due absence reactive electrophile as long significant fraction present. isotope labeling demonstrates that electrophile, cyclohexyl carbenium...
Aluminum site changes of dehydrated H-Beta zeolite during a rehydration process are systematically investigated by 27Al MAS and MQ NMR at high magnetic field up to 19.9 T. Benefiting from the field, more detailed information is obtained considerably broadened overlapped spectra zeolite. Dynamic aluminum sites demonstrated process. In completely H-Beta, invisible aluminums can reach 29%. The strength quadrupole interactions for framework decreases gradually progressive water adsorption...
Here we utilized 27Al MAS/MQMAS and 31P MAS NMR of quantitative adsorption trimethylphosphine oxide (TMPO) DFT calculations to elucidate the relationship between Al distribution Brönsted acidity series H-Beta zeolites derived from dealumination Al-rich zeolite. Three types acid strengths corresponding different specific T-sites were demonstrated. The removal one framework in 5MR2--2Al 6MR-2Al sites led increasing strength dealuminated H-Beta. Our findings on such exact correlation...
Layered RUB-36 and PREFER (lamellar precursor of ferrierite) are the precursors CDO FER-type zeolites, respectively. Both composed same ferrierite (FER) layer building blocks. Topotactic conversion from to pure silica zeolite ZSM-35 has been demonstrated in presence a surfactant cetyltrimethylammonium hydroxide (CTAOH). The transformation mechanism this process was revealed, for first time, by detailed investigations powder X-ray diffraction (XRD), scanning electron microscopy (SEM), thermal...
Perfectly sealed rotors were designed for the widespread application of <italic>in situ</italic> MAS NMR in catalysis, material synthesis, metabolomics, and more.
Surface metal hydrides (M–H) are ubiquitous in heterogeneous catalytic reactions, while the detailed characterizations frequently hindered by their high reactivity/low concentration, and complicated surface structures of host solids, especially terms practical solid catalysts. Herein, combining instant quenching capture advanced solid-state NMR methodology, we report first direct unambiguous evidence on highly reactive gallium (Ga–H) over a Ga2O3 catalyst during H2 activation. The...
Direct synthesis of renewable p-xylene (PX) by cycloaddition biomass-derived 2,5-dimethylfuran (2,5-DMF) and ethylene was achieved over Al-rich H-beta zeolites synthesized an organotemplate-free approach their dealuminated counterparts with different Si/Al ratios. Among them, zeolite ratio 22, obtained from parent dealumination, found to be excellent catalyst for the PX. A PX yield 97 % 2,5-DMF conversion 99 were under optimized conditions. These results are even better than those a...
27Al single pulse (SP) MAS NMR spectra of HBEA zeolites with high Si/Al ratios 71 and 75 were obtained at three magnetic field strengths 7.05, 11.75, 19.97 T. High acquired T show significantly improved spectral resolution, resulting in least two well-resolved tetrahedral-Al peaks. Based on the results from MQMAS T, four different quadrupole peaks are used to deconvolute SP various fields by using same set coupling constants, asymmetric parameters relative integrated peak intensities for...