A5100632673- Solid State Laser Technologies
- Zeolite Catalysis and Synthesis
- Luminescence Properties of Advanced Materials
- Advanced NMR Techniques and Applications
- Photorefractive and Nonlinear Optics
- Advanced Fiber Laser Technologies
- Mesoporous Materials and Catalysis
- Chemical Synthesis and Characterization
- Metal-Organic Frameworks: Synthesis and Applications
- Glass properties and applications
- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Laser-Matter Interactions and Applications
- ZnO doping and properties
- Advanced Photocatalysis Techniques
- Metal and Thin Film Mechanics
- Laser Design and Applications
- Radiation Detection and Scintillator Technologies
- Covalent Organic Framework Applications
- Diamond and Carbon-based Materials Research
- Semiconductor materials and devices
- Ga2O3 and related materials
- Solid-state spectroscopy and crystallography
- Gas Sensing Nanomaterials and Sensors
- Polyoxometalates: Synthesis and Applications
Chinese Academy of Sciences
2016-2025
Wuhan Institute of Physics and Mathematics
2016-2025
Chinese Academy of Agricultural Sciences
2018-2025
Institute of Plant Protection
2018-2025
Center for Excellence in Molecular Plant Sciences
2025
Beihang University
2025
Tongji University
2017-2024
University of Chinese Academy of Sciences
2020-2024
Yunnan Observatories
2024
University of Wisconsin–Madison
2024
Diamonds are forever: A diamond-like framework in which the C–C bonds replaced with rigid phenyl rings (see picture) is not only structurally stable but also has a large internal surface area. This porous aromatic (PAF-1) demonstrates high uptake capacities of hydrogen and carbon dioxide as well benzene toluene vapors, an unprecedented area 7100 m2 g−1. Detailed facts importance to specialist readers published "Supporting Information". Such documents peer-reviewed, copy-edited or typeset....
A series of porous aromatic frameworks (PAFs) were synthesized via a Yamamoto-type Ullmann reaction containing quadricovalent Si (PAF-3) and Ge (PAF-4). These PAFs are thermally stable up to 465 °C for PAF-3 443 PAF-4, corresponding 5% weight loss according the TG pattern. As PAF-1, they exhibit high surface areas (up 2932 m2 g−1) excellent adsorption ability hydrogen, methane carbon dioxide. Low pressure gas uptake experiments on show has highest heat (Qst) hydrogen (6.6 kJ mol−1) dioxide...
Propane dehydrogenation (PDH) has great potential to meet the increasing global demand for propylene, but widely used Pt-based catalysts usually suffer from short-term stability and unsatisfactory propylene selectivity. Herein, we develop a ligand-protected direct hydrogen reduction method encapsulating subnanometer bimetallic Pt-Zn clusters inside silicalite-1 (S-1) zeolite. The introduction of Zn species significantly improved Pt gave superhigh selectivity 99.3 % with weight hourly space...
Diamantenfieber: Ein Diamantgerüst, in dem C-C-Bindungen gegen Benzolringe ausgetauscht sind (siehe Bild), ist einerseits stabil und hat andererseits eine große innere Oberfläche. Das poröse aromatische Gerüst PAF-1 (Oberfläche 7100 m2 g−1) kann Mengen an Wasserstoff Kohlendioxid, Benzol- Toluoldampf aufnehmen. Detailed facts of importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available...
The development of sustainable and environmentally friendly techniques for synthesizing zeolites has attracted much attention, as the use organic templates solvents in hydrothermal synthesis is a major obstacle realizing green ways. Recently, introduction organotemplate-free method allowed avoiding templates, but water solvent was still required; solvent-free routes on other hand beared potential to significantly reduce amount polluted wastewater, were present. In this work, we have...
Solvents, who needs them? Silicoaluminophosphate zeolites with various frameworks have been successfully synthesized by a solvent-free route. Catalytic tests for the conversion of methanol to olefins show that thus obtained SAPO-34 (see picture) exhibited catalytic performance comparable made conventional hydrothermal
Development of sustainable routes for synthesis zeolites is very important because wide applications at large scale in the fields catalysis, adsorption, and separation. Here we report a novel generalized route presence NH4F from grinding anhydrous starting solid materials heating 140-240 °C. Accordingly, MFI, BEA*, EUO, TON structures have been successfully synthesized. The F(-) drives crystallization these amorphous phase. Compared with conventional hydrothermal synthesis, this work not...
Impregnation is the most commonly used approach to prepare supported metal catalysts in industry. However, this method suffers from formation of large particles with uneven dispersion, poor thermal stability, and thus unsatisfied catalytic performance. Here, we demonstrate that self-pillared MFI zeolite (silicalite-1 ZSM-5) nanosheets larger surface area abundant Si–OH groups are ideal supports immobilize ultrasmall monometallic (e.g., Rh Ru) various bimetallic clusters via simple incipient...
Abstract Ag/γ-Al 2 O 3 is widely used for catalyzing various reactions, and its performance depends on the valence state, morphology dispersion of Ag species. However, detailed anchoring mechanism species γ-Al remains largely unknown. Herein, we reveal that terminal hydroxyls are responsible The abundant existed nanosized can lead to single-atom silver dispersion, thereby resulting in markedly enhanced than cluster microsized . Density-functional-theory calculations confirm atom mainly...
Propane dehydrogenation (PDH) reaction has emerged as one of the most promising propylene production routes due to its high selectivity for and good economic benefits. However, commercial PDH processes usually rely on expensive platinum-based poisonous chromium oxide based catalysts. The exploration cost-effective ecofriendly catalysts with excellent catalytic activity, selectivity, stability is great significance yet remains challenging. Here, we discovered a new active center, i.e., an...
A zeolite dealumination mechanism is proposed on the basis of sensitivity-enhanced 27Al DQ-MAS NMR spectra (see picture), which revealed for first time detailed evolution extra-framework aluminum (EFAL) species and spatial proximities various in dealuminated HY zeolites. Three types EFAL close proximity to framework were identified. Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made...
Room temperature activation of methane over a Zn modified H-ZSM-5 zeolite catalyst was investigated by solid-state NMR spectroscopy in combination with other spectroscopic methods and DFT theoretical calculations. We found for the first time that resulted preferential formation surface methoxy intermediates at room temperature, which mediated methanol its further conversion to hydrocarbons. Experimental calculation results demonstrated an oxygen-containing dizinc cluster center open shell...
The spatial proximities of acid sites in dealuminated H–MOR and H–ZSM-5 zeolites have been comprehensively studied by two-dimensional 1H 27Al double-quantum magic-angle spinning (DQ-MAS) NMR spectroscopy. DQ-MAS revealed the detailed among Brønsted Lewis sites, while probed various aluminum species zeolites. It was found that all extra-framework (EFAL, sites) are always close proximity to framework (Brønsted both result from 13C CP/MAS adsorbed acetone demonstrated between lead a synergy...
Abstract Over zeolite H‐ZSM‐5, the aromatics‐based hydrocarbon‐pool mechanism of methanol‐to‐olefins (MTO) reaction was studied by GC‐MS, solid‐state NMR spectroscopy, and theoretical calculations. Isotopic‐labeling experimental results demonstrated that polymethylbenzenes (MBs) are intimately correlated with formation olefin products in initial stage. More importantly, three types cyclopentenyl cations (1,3‐dimethylcyclopentenyl, 1,2,3‐trimethylcyclopentenyl, 1,3,4‐trimethylcyclopentenyl...
Zeolites are important heterogeneous catalysts widely used in the modern chemical and petrochemical industries. Metal-containing zeolites show distinct performance catalytic processes such as fluid cracking, activation conversion of light alkanes, methanol-to-aromatics conversion, biomass transformation, so on. The metal speciation, distribution, interactions on have enormous impact their property performance. Significant efforts been devoted to synthesis more active selective by engineering...
The methanol-to-aromatics (MTA) reaction was investigated on Ga-modified ZSM-5 zeolites (Ga/ZSM-5). As revealed by 71Ga and 1H solid-state NMR FT-IR of pyridine adsorption measurements, cationic Ga species are formed as Lewis acid sites substitution Brønsted H-ZSM-5. Further experimental studies show that C5- C6-cycloalkenes generated during the MTA reaction, which lead to formation cyclic carbocations precursors aromatics. Isotope exchange experiments demonstrate reactivity Ga/ZSM-5 is much...
Optimizing kinetic barriers of ammonia synthesis to reduce the energy intensity has recently attracted significant research interest. The motivation for is discover means by which activation N2 dissociation and NHz (z = 1–2, surface intermediates) destabilization can be reduced simultaneously, that is, breaking "scaling relationship". However, far only a single success been reported in 2016 based on discovery strong–weak N-bonding pair: transition metals (nitrides)-LiH. Described herein...
The detailed structure–activity relationship of surface hydroxyl groups (Ti–OH) and adsorbed water (H2O) on the TiO2 should be key to clarifying photogenerated hole (h+) transfer mechanism for photocatalytic splitting, which however is still not well understood. Herein, one- two-dimensional 1H solid-state NMR techniques were employed identify molecules as their spatial proximity/interaction in photocatalysts. It was found that although two different types Ti–OH (bridging (OHB) terminal (OHT)...