Tuning the water resistance of Co3O4 catalysts via Ce incorporation for enhanced catalytic oxidation of toluene

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 162721 - 162721

Published: Feb. 1, 2025

Language: Английский

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Contributions of Oxide Support Reducibility for Selective Oxidation of 5-Hydroxymethylfurfural over Ag-Based Catalysts

Catalysts, Journal Year: 2025, Volume and Issue: 15(3), P. 248 - 248

Published: March 5, 2025

As a type of sustainable and renewable natural source, biomass-derived 5-hydroxymethyl furfural (HMF) can be converted into high-value chemicals. This study investigated the interactions between silver (Ag) oxide supports with varied reducibility their contributions to tuning catalytic performance in selective oxidation HMF. Three representatives manganese dioxide (MnO2), zirconium (ZrO2), silicon (SiO2) were selected support Ag active sites. The catalysts characterized by techniques such as STEM (TEM), Raman, XPS, H2-TPR, FT-IR spectroscopy explore morphology, dispersion, surface properties, electronic states. results demonstrated that MnO2 highest exhibited superior performance, achieving 75.4% HMF conversion 41.6% selectivity for 2,5-furandicarboxylic acid (FDCA) at 120 °C. In contrast, ZrO2 SiO2 limited capabilities, mainly producing intermediate products like FFCA and/or HMFCA. ability these was governed reducibility, because it determined density oxygen vacancies (Ov) hydroxyl groups (OOH), eventually influenced activity, reaction rate: Ag/MnO2 (3214.5 molHMF·gAg−1·h−1), Ag/ZrO2 (2062.3 Ag/SiO2 (1394.4 molHMF·gAg−1·h−1). These findings provide valuable insights rational design high-performance chemical conversion.

Language: Английский

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Near-infrared photothermal catalysis for biomass upgrading

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 137539 - 137539

Published: April 1, 2025

Language: Английский

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A novel white Y2(Ti0.8Hf0.2)2O7: Eu phosphors regulated by HfO2 exhibiting low color shifting for high temperature

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, Journal Year: 2024, Volume and Issue: 323, P. 124935 - 124935

Published: Aug. 5, 2024

Language: Английский

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Synthesis and Optimization of Foam Copper-Based CoMnO_x@Co₃O₄/CF Catalyst: Achieving Efficient Catalytic Oxidation of Paraxylene

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(45), P. 61970 - 61982

Published: Oct. 31, 2024

This study successfully developed a foam copper (CF)-based CoMnOx@Co3O4/CF composite catalyst, achieving efficient thermal catalytic oxidation of paraxylene through multifactor optimization synthesis conditions. At Co:Mn molar ratio 2:1 and calcination temperature 450 °C, the catalyst exhibited outstanding performance, with T90 as low 246 significantly lower than that catalysts synthesized under other Additionally, BET, XPS, Raman, EPR, H2-TPR test results indicate possesses high specific surface area, abundant oxygen vacancies, distribution multivalent Co Mn species, hydrogen reduction temperature, all which contribute to activity CoMnOx@Co3O4/CF. Furthermore, in situ DRIFTS confirmed on follows Mars–Van Krevelen (MvK) mechanism. The proposed reaction pathway begins methyl group paraxylene, followed by opening benzene ring further CO2 H2O. innovative structural design excellent performance this provide new insights solutions for industrial treatment VOCs.

Language: Английский

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CeMnOX catalysts for enhanced ozonation of phenol: Performance evaluation and mechanism investigation

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2024, Volume and Issue: unknown, P. 135771 - 135771

Published: Nov. 1, 2024

Language: Английский

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