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Catalytic ozonation of dimethyl phthalate by Ti-MCM-41 in water.
RSC Adv
January 2025
Jiangsu Key Laboratory of Marine Biological Resources and Environment, Jiangsu Ocean University Lianyungang 222005 China
A Ti-MCM-41 mesoporous molecular sieve catalyst was prepared by a hydrothermal method. Nitrogen adsorption desorption, XRD, TEM and SEM characterization results showed that the catalyst had a large specific surface area, a regular hexagonal pore structure, and titanium doping was uniformly dispersed in MCM-41 molecular sieves. The amount of titanium doping, reaction temperature, and the initial solution pH had important effects on the catalytic ozonation of dimethyl phthalate (DMP) by Ti-MCM-41.
View Article and Find Full Text PDFQuantifying Asymmetric Coordination to Correlate Oxygen Reduction Activity in Fe-Based Single-Atom Catalysts.
Angew Chem Int Ed Engl
January 2025
Tianjin University, School of Materials Science and Engineering, CHINA.
Precisely manipulating asymmetric coordination configurations and examining electronic effects enable to tuning the intrinsic oxygen reduction reaction (ORR) activity of single-atom catalysts (SACs). However, the shortage of a definite relationship between coordination asymmetry and catalytic activity makes the rational design of SACs ambiguous. Here, we propose a concept of "asymmetry degree" to quantify asymmetric coordination configurations and assess the effectiveness of active moieties in Fe-based SACs.
View Article and Find Full Text PDFCharacterization of Ultraviolet-Degraded Polyethylene Terephthalate Film Using a Complementary Approach: Reactive Pyrolysis-Gas Chromatography-Mass Spectrometry and Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry.
Mass Spectrom (Tokyo)
January 2025
JEOL Ltd., 3-1-2 Musashino, Akishima, Tokyo 196-8558, Japan.
Polyethylene terephthalate (PET) is widely used across various industries owing to its versatility and favorable properties, including application in beverage bottles, food containers, textile fibers, engineering resins, films, and sheets. However, polymer materials are susceptible to degradation from factors such as light, oxygen, and heat. Therefore, it is crucial to understand the structural changes that occur during degradation and the extent of these changes.
View Article and Find Full Text PDFBoosting selective chlorine evolution reaction: Impact of Ag doping in RuO electrocatalysts.
J Colloid Interface Sci
January 2025
School of Rare Earths, University of Science and Technology of China, Hefei, Anhui 230026, PR China; Key Laboratory of Rare Earths, Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou, Jiangxi 341000, PR China. Electronic address:
The chlor-alkali process is critical to the modern chemical industry because of the wide utilization of chlorine gas (Cl). More than 95 % of global Cl production relies on electrocatalytic chlorine evolution reaction (CER) through chlor-alkali electrolysis. The RuO electrocatalyst serves as the main active component widely used in commercial applications.
View Article and Find Full Text PDFMechanistic Understanding of Dissociated Hydrogen in Cu/CeO-Catalyzed Methanol Synthesis.
ACS Appl Mater Interfaces
January 2025
School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China.
The hydrogen dissociation and spillover mechanism on oxide-supported Cu catalysts play a pivotal role in the hydrogenation of carbon dioxide to methanol. This study investigates the hydrogen spillover mechanism on Cu/CeO catalysts using spectral characterization under high-pressure reaction conditions and density functional theory (DFT) simulations. The research confirms that the Cu sites serve as the initial dissociation points for the hydrogen molecules.
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