A5065039738- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Gas Sensing Nanomaterials and Sensors
- Electrocatalysts for Energy Conversion
- Catalysis and Hydrodesulfurization Studies
- Advanced Photocatalysis Techniques
- Ammonia Synthesis and Nitrogen Reduction
- Nanomaterials for catalytic reactions
- Electronic and Structural Properties of Oxides
- Copper-based nanomaterials and applications
- Catalysts for Methane Reforming
- Magnetic and transport properties of perovskites and related materials
- Enhanced Oil Recovery Techniques
- Hydrocarbon exploration and reservoir analysis
- Surfactants and Colloidal Systems
- Supercapacitor Materials and Fabrication
- Industrial Gas Emission Control
- Adsorption and biosorption for pollutant removal
- Mercury impact and mitigation studies
- Semiconductor materials and devices
- Advanced Condensed Matter Physics
- Advancements in Battery Materials
- Pickering emulsions and particle stabilization
- Advanced battery technologies research
- CO2 Reduction Techniques and Catalysts
State Key Joint Laboratory of Environment Simulation and Pollution Control
2014-2025
Tsinghua University
2015-2025
Beijing Normal University
2023-2024
Jilin University
2013-2024
Peking University
2022
Peking University Third Hospital
2022
Carnegie Mellon University
2018-2020
Massachusetts Institute of Technology
2018
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
2013-2014
Catalytic combustion technology is one of the effective methods to remove VOCs such as toluene from industrial emissions. The decomposition an aromatic ring via catalyst oxygen vacancies usually rate-determining step oxidation into CO2. Series CeO2 probe models were synthesized with different ratios surface-to-bulk vacancies. Besides devotion surface vacancies, a part bulk promotes redox property in catalytic combustion: tend adsorb and activate gaseous O2 form adsorbed species, whereas...
MOx/ABO3 is a promising catalyst for the high-efficiency removal of volatile organic compounds. However, this limited on practical applications due to its complex synthesis procedure and high cost. In work, MnO2/LaMnO3 was prepared in situ using facile one-step method first time, which partial La cations were selectively removed from three dimensionally chain-like ordered macroporous (3DOM) LaMnO3 material. After selective removal, obtained sample expressed an excellent catalytic performance...
With the expansion of industry, emission greenhouse gases is increasing, and its impact on climate becoming more serious. CO2 main culprit effect, how to effectively solve problem caused by has attracted attention. In recent years, there have been continuous attempts reduce emissions from source, but no obvious results achieved. fact, not only a gas, also potential carbon resource. Therefore, capture use research direction that many scholars exploring recently. this paper, current situations...
Selective dissolution is a common corrosion process in dealloying which an alloy immersed acid to remove the active element, leaving behind inert constituent. We introduce this technique into treatment of oxide catalysts. A three-dimensionally ordered macroporous LaMnO3 perovskite has been prepared and treated with diluted HNO3 selectively La cations, acquiring novel γ-MnO2-like material. not satisfactory catalyst on CO oxidation. Upon removal obtained sample showed significantly higher...
Catalytic combustion is an advanced technology to eliminate industrial volatile organic compounds such as toluene. In order replace the expensive noble metal catalysts and avoid aggregation phenomenon occurring in traditional heterogeneous interfaces, designing homogeneous interfaces can become emerging methodology enhance catalytic performance of oxide catalysts. A mesocrystalline CeO2 catalyst with abundant Ce-Ce synthesized via a self-flaming method which exhibits boosted for toluene...
Simultaneous catalytic elimination of nitrogen oxides (NOx, x = 1 and 2) volatile organic compounds (VOCs) is great importance for environmental preservation in China. In this work, the interactions simultaneous removal NOx methylbenzene (PhCH3) were investigated on a CeO2–TiO2 mixed oxide catalyst, which demonstrated excellent bifunctional efficiencies two pollutants. The results indicated that positively promotes PhCH3 oxidation, while NH3 negatively inhibits through competitive adsorption...
Metal oxide catalysts like CeO2 exhibit promising prospects to replace the currently used noble metal in catalytic oxidation of volatile organic compounds (VOCs). Although oxygen vacancy is regarded as an active site these novel VOC elimination (e.g., toluene), its actual function and activity remain unclear due limitation following dynamic evolution during reactions. Meanwhile, because involves generation–consumption cycle reactive species rather than being constant, this barrier causes a...
Understanding the sensing mechanism of metal oxide semiconductors is imperative to development high-performance sensors. The traditional only recognizes effect surface chemisorbed oxygen from air but ignores lattice oxygen. Herein, using in-situ characterizations, we provide direct experimental evidence that participated in process can come oxides. Further density functional theory (DFT) calculations prove p-band center O serves as a state art for regulating participation gas-sensing...
A novel γ-MnO<sub>2</sub>-like catalyst obtained by selective removal showed higher catalytic performance than other traditional manganese oxides in toluene combustion.
Selective dissolution of perovskite A site (A ABO3 structure) was performed on the La1 - xSrxCoO3 catalysts for NOx storage and reduction (NSR) reaction. The surface area were enhanced using dilute HNO3 impregnation to dissolve Sr. Inactive SrCO3 removed effectively within 6 h, catalyst preserved framework after 24 h treatment. tuned exhibited higher NSR performance (both NO-to-NO2 oxidation) under lean-burn fuel-rich cycles at 250 °C. Large amounts adsorption due increase nitrate/nitrite...
The in situ IR and Raman spectroscopy measurements were conducted to investigate lead poisoning on the CeO2—WO3 catalysts. deactivation mechanisms studied with respect changes of surface acidity, redox property, nitrate/nitrite adsorption behaviors, key active sites (note that results structure–activity relationship based our previous research). (1) Lewis acid originated from CeO2 crystalline WO3, whereas Brønsted Ce2(WO4)3. poisoned catalysts exhibited a lower acidity than fresh catalysts:...
Fresh and arsenic-poisoned V2O5–WO3/TiO2 catalysts are investigated by experiments DFT calculations for SCR activity the deactivation mechanism. Poisoned catalyst (1.40% of arsenic) presents lower NO conversion more N2O formation than fresh. Stream (5%) could further decrease poisoned above 350 °C. The is not attributed to loss surface area or phase transformation TiO2 at a certain arsenic content, but due coverage V2O5 cluster in acidity: number Lewis acid sites stability Brønsted sites....
To investigate the poisoning and regeneration of SCR catalysts, fresh arsenic-poisoned commercial V2O5–WO3/TiO2 catalysts are researched in context deactivation mechanisms technology. The results indicate that forms arsenic oxide on poisoned catalyst related to proportion (As) catalyst. When surface coverage (V+W+As) is lower than 1, trivalent species (AsIII) major component, this prefers permeate into bulk-phase channels. However, at high As concentrations, pentavalent (AsIV) cover Although...
Catalytic combustion is an efficient method to eliminate CO and volatile organic compound (VOC) pollutants. CuMn2O4 spinel a high-performance non-noble metal oxide catalyst for catalytic has the potential replace noble catalysts. In order further improve activity of spinel, we propose simple low-cost approach introduce numerous oxygen vacancies simultaneously in situ on surface VOCs. Alkali treatment was used generate (VO), copper (VCu), novel active sites (VO combines with Mn2O3 at...
The effects of Ru on the V2O5–WO3/TiO2 catalyst were studied in NOx and chlorobenzene (CB) simultaneous controls terms promoting C–Cl cleavage decreasing polychlorinated species. Herein, we synthesized Ru-modified vanadia-based catalysts, which demonstrated stable CB conversions with high selectivity to N2, CO2, HCl. newly formed V–O–Ru chains surface strengthened electron capability narrowed down band gap vanadium, weakened Lewis acid sites avoid generation species via electrophilic...
The V2O5/TiO2 (VTi) catalyst has been widely employed for the NH3 selective catalytic reduction (NH3-SCR) reaction, and sulfur (S) alkali metals (K) were usually considered as poisons during this reaction. In work, synergistic effect of S K over VTi NH3-SCR reaction was analyzed discussed. It is surprisingly observed that effects exhibited a detoxification on That is, although moderate resistance to poisoning unsatisfactory deactivation, SCR activity restored close fresh when coexisted. This...