A5068576964- Catalytic Processes in Materials Science
- Boron and Carbon Nanomaterials Research
- Catalysis and Oxidation Reactions
- Diamond and Carbon-based Materials Research
- Metal and Thin Film Mechanics
- Nanomaterials for catalytic reactions
- Graphene research and applications
- Semiconductor materials and devices
- Copper-based nanomaterials and applications
- Advanced Photocatalysis Techniques
- Electrocatalysts for Energy Conversion
- Advancements in Battery Materials
- Gas Sensing Nanomaterials and Sensors
- Electronic and Structural Properties of Oxides
- ZnO doping and properties
- Ammonia Synthesis and Nitrogen Reduction
- TiO2 Photocatalysis and Solar Cells
- nanoparticles nucleation surface interactions
- Advanced Battery Materials and Technologies
- MXene and MAX Phase Materials
- Gold and Silver Nanoparticles Synthesis and Applications
- GaN-based semiconductor devices and materials
- Industrial Gas Emission Control
- Electrochemical Analysis and Applications
- Catalysis and Hydrodesulfurization Studies
Chinese Academy of Medical Sciences & Peking Union Medical College
2025
Shaanxi University of Science and Technology
2025
Zhejiang University
2014-2024
University College London
2024
Southwestern University of Finance and Economics
2023
Chengdu University of Technology
2021-2023
Hangzhou Xixi hospital
2015-2021
State Key Laboratory of Silicon Materials
2011-2012
Ningbo Institute of Industrial Technology
2011
Chinese Academy of Sciences
1997-2011
Rotation during reaction Determining changes in heterogeneous catalysts under conditions can provide insight into mechanisms. Under conditions, not only metal nanoparticles change shape but their interaction with the oxide support could also be affected. Yuan et al. used aberration-corrected environmental transmission electron microscopy to study gold on titanium surfaces at low beam doses. During carbon monoxide (CO) oxidation total pressures of a few millibars and 500°C, they observed that...
Imaging reactive surface water Recent developments in transmission electron microscopy (TEM) have enabled imaging of single atoms, but adsorbed gas molecules proven more challenging because a lack sufficient image contrast. Yuan et al. and carbon monoxide (CO) on reconstructed nanocrystalline anatase titanium dioxide (TiO 2 ) that has protruding TiO 3 ridges every four unit cells, which provide regions distinct Water adsorption this during environmental TEM experiments led to the formation...
Pd/CeO2 has attracted great attention owing to its unique activity for methane catalytic oxidation; however, the active sites CH4 oxidation still remain elusive, which affects comprehensive understanding of mechanism. In this work, structures PdOx nanoparticles (NPs) loaded on octahedrons, cubes, and rods nanocrystal CeO2 supports were systematically studied by Cs-corrected HRTEM/STEM, XPS, Raman spectroscopy. Our results indicate that Pd species are morphology-dependent: PdO NPs (Pd2+) (x =...
Carbon nanotubes were obtained by pyrolysis of acetylene or ethylene catalyzed iron oxide nanoparticles. The morphology, microstructure, and lithium insertion properties these carbon investigated transmission electron microscopy, high‐resolution X‐ray diffraction, Raman spectroscopy, electrochemical measurements, respectively. results showed that the structures play major roles in both specific capacity cycle life. Slightly graphitized a 640 mAh/g during first charge, whereas...
Preventing sintering of supported nanocatalysts is an important issue in nanocatalysis. A feasible way to choose a suitable support. However, whether the metal-support interactions promote or prevent has not been fully identified. Now, completely different behaviors Au nanoparticles on distinct anatase TiO2 surfaces have determined by situ TEM. The full processes were visualized (101) surface, which coupled Ostwald ripening and particle migration coalescence. In contrast, no (001) surface...
One dimensional copper hydroxide nanostrands, two Cu(2)(OH)(3)NO(3) nanoribbons and three CuO nanowalnuts were synthesized from the same diluted nitrate solution with ethanolamine at room temperature 10 °C, respectively. The formed by slowly hydrolyzing low temperature. through dehydration of nanostrands in aqueous Although their average size is about 500 nm, specific surface area can be as large 61.24 m(2) g(-1), due to particular morphology assembling 8 nm grains. converted porous...
Abstract Nitrogen oxides are one of the major sources air pollution. To remove these pollutants originating from combustion fossil fuels remains challenging in steel, cement, and glass industries as catalysts severely deactivated by SO 2 during low‐temperature selective catalytic reduction (SCR) process. Here, a MnO X /CeO nanorod catalyst with outstanding resistance to deactivation is reported, which designed based on critical information obtained situ transmission electron microscopy (TEM)...
Abstract The strong metal‐support interaction (SMSI) is widely used in supported metal catalysts and extensive studies have been performed to understand it. Although considerable progress has achieved, the surface structure of support, as an important influencing factor, usually ignored. We report a facet‐dependent SMSI Pd‐TiO 2 oxygen by using situ atmospheric pressure TEM. Pd NPs on TiO (101) (100) surfaces showed encapsulation. In contrast, no such cover layer was observed (001) catalyst...
Identifying the active phase with highest activity, which is long-believed to be a steady state of catalyst, basis rational design heterogeneous catalysis. In this work, we performed detailed in situ investigations, successfully capturing instantaneous structure–activity change oscillating Pd nanocatalysts during methane oxidation, reveals an unprecedented oscillatory state. Combining quantitative environmental transmission electron microscopy and highly sensitive online mass spectrometry,...
Engineering of support facet and metal valence states is recognized as an effective strategy for manipulating the sintering dispersion nanoparticles (NPs). Here, we report unusual state-independent but facet-dependent effect sintering/dispersion behaviors Pd NPs on anatase TiO2 surfaces, which confirmed by density functional theory (DFT) calculation in situ environmental scanning transmission electron microscopy (ESTEM). All species, including atoms Pd2+ ions, sintered (100) surface through...
The reaction between NO<sub>2</sub> and NH<sub>3</sub>/NH<sub>4</sub><sup>+</sup> induced the formation of NH<sub>X<3</sub> species with high oxidability; promoted surface sulfate decomposition; de-NO<sub>X</sub> performance was achieved in presence SO<sub>2</sub> at low temperature.
The anatase TiO2 (001) surface has attracted extensive attention in science and for practical applications because of its excellent performance. However, the highly reactive usually reconstructs to a (1 × 4)-(001) surface, which may potentially alter properties. As result, there are still controversial issues concerning intrinsic performance this surface. Recently, significant advances have been made study (001), elucidated physical chemical In review, we summarize our present understanding...
Surface oxygen vacancies have been widely discussed to be crucial for tailoring the activity of various chemical reactions from CO, NO, water oxidation by using oxide-supported catalysts. However, real role and potential function surface in reaction remains unclear because their very short lifetime. Here, it is reported that can well confined electrostatically a polarization screening near perimeter interface between Pt {111} nanocrystals negative polar (001) ferroelectric PbTiO3....