A5073761478- Zeolite Catalysis and Synthesis
- Chemical Synthesis and Characterization
- Advanced NMR Techniques and Applications
- Ammonia Synthesis and Nitrogen Reduction
- Advanced Photocatalysis Techniques
- Catalytic Processes in Materials Science
- Electrocatalysts for Energy Conversion
- Electronic and Structural Properties of Oxides
- Catalysis and Oxidation Reactions
- Quantum Dots Synthesis And Properties
- Reproductive tract infections research
- Inorganic Chemistry and Materials
- Copper-based nanomaterials and applications
- X-ray Diffraction in Crystallography
- Cervical Cancer and HPV Research
- Hydrogen Storage and Materials
- Asymmetric Hydrogenation and Catalysis
- Perovskite Materials and Applications
- Genital Health and Disease
- Chalcogenide Semiconductor Thin Films
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Materials Characterization Techniques
University of Oxford
2020-2025
Diamond Light Source
2021-2025
Rutherford Appleton Laboratory
2025
Abstract TiO 2 -based powder materials have been widely studied as efficient photocatalysts for water splitting due to their low cost, photo-responsivity, earthly abundance, chemical and thermal stability, etc. In particular, the recent breakthrough of nitrogen-doped , which enhances presence structural defects dopant impurities at elevated temperatures, exhibits an impressive visible-light absorption photocatalytic activity. Although electronic optical properties extensively studied,...
A local-magnetic-field-promoted photocatalytic overall water splitting system is developed for the Fe 3 O 4 /N-TiO 2 catalyst, and an unprecedented solar-to-hydrogen efficiency of 11.9 ± 0.5% achieved at 270 °C.
There has been a long debate on how and where active sites are created for molecular adsorption catalysis in zeolites, which underpin many important industrial applications. It is well accepted that Lewis acidic (LASs) basic (LBSs) as pristine zeolites generally believed to be the extra-framework Al species residue anion (OH–) formed at fixed crystallographic positions after their synthesis. However, dynamic interactions of adsorbates/reactants with zeotype materials "create" during real...
The distribution of substitutional aluminum (Al) atoms in zeolites affects molecular adsorbate geometry, catalytic activity, and shape size selectivity. Accurately determining Al positions has been challenging. We used synchrotron resonant soft x-ray diffraction (RSXRD) at multiple energies near the K-edge combined with adsorption techniques to precisely locate “single Al” “Al pairs” a commercial H-ZSM-5 zeolite. This analysis depicts three distinct tetrahedral (T) sites: T8, T6, T4. A suite...
Zeolites have found tremendous applications in the chemical industry. However, dynamic nature of their active sites under flow adsorbate molecules for adsorption and catalysis is unclear, especially operando conditions, which could be different from as-synthesized structures. In present study, we report a structural transformation adsorptive SAPO-34 zeolite by using acetone as probe molecule various temperatures. The combination solid-state nuclear magnetic resonance, situ...
Barium zirconate perovskites have been systematically investigated as protonic supports for ruthenium nanoparticles in the Haber–Bosch ammonia synthesis reaction. A series of based on barium were synthesized, which B-site ABO3 perovskite was doped with different aliovalent acceptor cations and varying ratios, resulting proton conductivities trapping behaviors. Crucially, we provide direct evidence importance a hydrogen-migration mechanism over these proton-conducting materials from studies...
Abstract Zeolites have found tremendous applications in the chemical industry. However, dynamic nature of their active sites under flow adsorbate molecules for adsorption and catalysis is unclear, especially operando conditions, which could be different from as‐synthesized structures. In present study, we report a structural transformation adsorptive SAPO‐34 zeolite by using acetone as probe molecule various temperatures. The combination solid‐state nuclear magnetic resonance, situ...
Abstract There has been a long debate on how and where active sites are created for molecular adsorption catalysis in zeolites which underpin many important industrial applications. For example, Lewis acidic site (LAS) basic (LBS) generally believed to be the extra-framework Al species residue anion (OH − ) formed at fixed crystallographic positions zeolite structures after their synthesis. Here, direct experimental observation of adsorbate-induced silicoaluminophosphate (SAPO) is first time...
Journal Article Spatial Differentiation of Aluminium Siting by the Single-Atom Adsorption Sites in Zeolite Electron Microscopy Get access Ping-Luen Baron Ho, Ho Wolfson Catalysis Centre, Department Chemistry, University Oxford, UKDepartment Materials, UK Search for other works this author on: Oxford Academic Google Scholar Christopher Foo, Foo UKDiamond Light Source, Didcot, Wei-Che Lin, Lin Shik Chi Edman Tsang, Tsang Corresponding author: edman.tsang@chem.ox.ac.uk,...
Abstract It has only recently been established that doping light elements (lithium, boron, and carbon) into supported transition metals can fill interstitial sites, which be observed by the expanded unit cell. As an example, lithium ( int Li) block H filling octahedral interstices of palladium metal lattice, improves partial hydrogenation alkynes to alkenes under hydrogen. In contrast, herein, we report Li is not found in case Pt/C. Instead, observe for first time a direct ‘substitution’ Pt...