A5029421795- Advanced Photocatalysis Techniques
- Catalysis for Biomass Conversion
- Catalytic Processes in Materials Science
- Electrocatalysts for Energy Conversion
- Catalysis and Hydrodesulfurization Studies
- Lignin and Wood Chemistry
- Oxidative Organic Chemistry Reactions
- Radical Photochemical Reactions
- Covalent Organic Framework Applications
- CO2 Reduction Techniques and Catalysts
- Catalysis and Oxidation Reactions
- Ammonia Synthesis and Nitrogen Reduction
- Perovskite Materials and Applications
- Enzyme-mediated dye degradation
- Nanomaterials for catalytic reactions
- Sulfur-Based Synthesis Techniques
- Advanced Nanomaterials in Catalysis
- Biochemical and biochemical processes
- Polyoxometalates: Synthesis and Applications
- TiO2 Photocatalysis and Solar Cells
- Catalytic C–H Functionalization Methods
- Hybrid Renewable Energy Systems
- Biofuel production and bioconversion
- Copper-based nanomaterials and applications
- Nanocluster Synthesis and Applications
Dalian National Laboratory for Clean Energy
2016-2025
Dalian Institute of Chemical Physics
2016-2025
Chinese Academy of Sciences
2016-2025
University of Chinese Academy of Sciences
2016-2024
State Key Laboratory of Molecular Reaction Dynamics
2024
Dalian University
2017-2020
Huazhong University of Science and Technology
2015
Battery Park
2015
Photocatalysis is a potentially promising approach to harvest aromatic compounds from lignin. However, the development of an active and selective solid photocatalyst still challenging for lignin transformation under ambient conditions. We herein report mild photocatalytic oxidative strategy C–C bond cleavage β-O-4 β-1 linkages using mesoporous graphitic carbon nitride catalyst. Identifications by solid-state NMR techniques density functional theory (DFT) calculations indicate that π–π...
Obtaining high selectivity of aromatic monomers from renewable lignin has been extensively pursued but is still unsuccessful, hampered by the need to efficiently cleave C–O/C–C bonds and inhibit proliferation reactions. Herein, we report a transfer hydrogenolysis protocol using heterogeneous ZnIn2S4 catalyst driven visible light. In this process, alcoholic groups (CαH–OH) act as hydrogen donors. Proliferation phenolic products dark substances suppressed under light illumination at low...
We herein report a two-step strategy for oxidative cleavage of lignin C–C bond to aromatic acids and phenols with molecular oxygen as oxidant. In the first step, β-O-4 alcohol was oxidized ketone over VOSO4/TEMPO [(2,2,6,6-tetramethylpiperidin-1-yl)oxyl)] catalyst. second linkages selectively cleaved by oxidation Cu/1,10-phenanthroline Computational investigations suggested copper-oxo-bridged dimer catalytically active site hydrogen-abstraction from Cβ–H bond, which rate-determining step cleavage.
Biomass is renewable and the most abundant carbon resource, it shows great potential for sustainable production of chemicals in future. With respect to limited fossil reserves, biomass conversion has aroused global attention. The use as a resource developed rapidly recent years, various kinds could be produced from biomass. Although annually abundant, important process efficient way. Before rushing into conversion, necessary consider what are reasonably economically In this Review, we first...
One of the challenges depolymerizing lignin to valuable aromatics lies in selective cleavage abundant C–O bonds β-O-4 linkages. Herein we report a photocatalytic oxidation–hydrogenolysis tandem method for cleaving alcohols. The Pd/ZnIn2S4 catalyst is used aerobic oxidation α-C–OH alcohols α-C═O with 455 nm light, and then TiO2–NaOAc system employed neighboring through hydrogenolysis reaction by switching 365 light. Interestingly, can be conducted one pot offer ketones phenols (up 90%...
This work demonstrates the synthesis of an efficient photocatalyst, Au25(PPh3)10Cl2(SC3H6SiO3)5/TiO2, for selective oxidation amines to imines. The photocatalyst is prepared via hydrolysis Au25(PPh3)10Cl2[(SC3H6Si(OC2H5)3]5 nanoclusters in presence TiO2 support. gold exhibit good photocatalytic activity using visible light and under mild thermal conditions with molecular oxygen (O2). turnover frequency (TOF) 4-methylbenzylamine found be 1522 h–1, which considerably higher than that...
Biomass reforming by harvesting solar energy can provide green hydrogen. Current biomass photoreforming provides H2 erratically and in limited yield although efficiently, owing to intermittent features of light incomplete degradation C–C bonds. Here, we detour the flaws prioritizing conversion carbohydrates liquid hydrogen carriers (LHCs, consisting HCOOH HCHO), appropriate for transportation. Subsequently, LHCs are fully decomposed, releasing only CO2. This stepwise process enables complete...
Lignin is the largest carrier of aromatics on earth, and its depolymerization can afford value-added aromatic products. Direct cleavage C–C bonds in lignin linkages significant, but it challenging to obtain low-molecular-weight monomers. Herein, using vanadium catalysts under visible light, we selectively cleave β-1 β-O-4 interlinkages occluded models extracts by an oxidative protocol. Visible light irradiation triggered single electron transfer between substrate catalyst, which further...
Selective cleavage of C–C bonds is pursued as a useful chemical transformation method in biomass utilization. Herein, we report hybrid CuOx/ceria/anatase nanotube catalyst the selective oxidation under visible light irradiation. Using lignin β-1 model substrate offers 96% yields benzaldehydes. Characterization results by high angle annular dark field scanning transmission electron microscopy (HAADF-STEM) and energy-dispersive X-ray spectroscopy element (EDX) mapping reveal that CuOx clusters...
Generation of controllable carbon radical under the assistance N-oxyl is an efficient method for activation C-H bonds in hydrocarbons. We herein report that irradiation α-Fe2O3 and N-hydroxyphthalimide (NHPI) 455 nm light generates phthalimide-N-oxyl (PINO*), which after being formed by oxidation with holes, confined on surface. The half-life time reaches 22 s as measured situ electron paramagnetic resonance (EPR) turned off. This allows long-lived to abstract H from bond form a reacts...
Photocatalytic selective oxidation of hydrocarbons to oxygenated chemicals greatly relies on catalytic materials that show high efficiency photogenerated holes and electrons separation visible light absorption capacity. We, herein, report one facile calcination approach with ammonium chloride melamine as the template synthesize nitrogen-modified Nb2O5 nanomeshes material (Nb2O5-N), which exhibits a 37-fold reaction rate larger than its commercial counterpart in photocatalytic toluene into...
Photocatalytic C-C bond formation coupled with H2 production provides a sustainable approach to producing carbon-chain-prolonged chemicals and hydrogen energy. However, the involved radical intermediates open-shell electronic structures are highly reactive, experiencing predominant oxidative or reductive side reactions in semiconductors. Herein, we demonstrate that bonding on catalyst surface bulk solution can inhibit oxidation reverse reaction of α-hydroxyethyl radicals (αHRs)...
Supported metal in the form of single atoms, clusters, and particles can individually or jointly affect activity supported heterogeneous catalysts. While individual contribution to overall photocatalysts has been identified, joint mixed species is overlooked because their different photoelectric properties. Here, atomically dispersed Pd (Pd1) clusters are loaded onto CdS, serving as oxidation reduction sites for methanol dehydrogenation. The Pd1 substitutes Cd2+, forming hole-trapping states...
Photocatalytic H2 evolution from organic feedstocks with simultaneous utilization of photogenerated holes achieves solar energy storage and coproduces value-added chemicals. Here we show visible-light production benzyl alcohol (BAL) controllable generation deoxybenzoin (DOB) or benzoin (BZ) through tandem redox reactions. Particularly, DOB synthesis circumvents the use expensive environmentally unfriendly catalysts that are required previously. Under irradiation blue LEDs, key steering major...
Depolymerization of lignin meets the difficulty in cleaving robust aryl ether bond. Herein, through installing an internal nucleophile β-O-4′ linkage, selective cleavage was realized by intramolecular substitution on rings affording non-phenolic arylamine products. In particular, nitrogen-modified models and samples were employed to generate iminyl radical under photocatalytic reduction, which acted as inducing migration from O N atom. The following hydrolysis released primary arylamines...
A new route to the synthesis of substituted imidazoles was developed <italic>via</italic> photocyclization amines over Mo–ZnIn<sub>2</sub>S<sub>4</sub> under visible light irradiation.
Comprehensive Summary Methane, the main component of natural gas and shale gas, can be converted to upgraded fuels, syngas value‐added chemicals. Due nonpolar character methane large bond dissociation energy sp 3 C—H bond, conversion requires strong oxidants or acids/bases for its activation. Photocatalysis capable inducing highly oxidative surrogates enables scission at room temperature, thereby avoiding side reactions coke formation caused by high reaction temperature. The generates •CH...