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Article
Chemistry, Physical
Quanming Ren et al.
Summary: The present work investigated the influence of oxygen species on toluene oxidation over Co3O4-based catalysts. Pt nanoparticles were anchored onto Co3O4 nanoneedles, nanoflowers, nanocubes, and nanoplates. The Pt/Co3O4 catalyst exhibited significantly improved catalytic activity compared to Co3O4, with Pt/Co3O4-p showing the highest activity. The enhanced reducibility and oxygen mobility induced by Pt nanoparticles contributed to the improved catalytic performance.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Ganggang Li et al.
Summary: In this study, Co3O4 materials with different morphologies were fabricated and the effect of water on their catalytic activity was investigated. The results showed that spherical Co3O4 displayed the best catalytic activity under dry conditions, while rod-like Co3O4 exhibited the best water resistance under humid conditions. Correlative characterizations and DFT calculations were used to reveal the mechanism behind water's effect.
Article
Engineering, Environmental
Chenyang Lu et al.
Summary: A highly selective acetylene selective hydrogenation catalyst (Cu15Pd@C) was successfully prepared, which improves ethylene selectivity while maintaining high activity. The carbon layer promotes the formation of smaller nanoparticles and effectively inhibits the production of green oil associated with acetylene coupling. The same approach was applied to fabricate a series of carbon-confined Cu and Ag-based bimetal catalysts, demonstrating the universality and potential applications of the carbon layer in selective hydrogenation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Shida Liu et al.
Summary: Transition metal oxides, particularly Co-based spinel oxides, have potential as alternatives to noble metal catalysts in oxidation reactions. In this study, NixCo3-xO4 catalysts were synthesized to investigate the influence of oxygen vacancies on catalyst activities and reaction mechanisms in ethane combustion. The activity was found to be correlated with the population and properties of O defects, with a higher number of defects resulting in increased activity. The shape-induced facet effect was also related to the amount of Ni incorporated into the octahedral sites of Co oxide. The findings from this study contribute to a better understanding of facet-dependent catalytic behavior and the design of high-performance catalysts.
Article
Chemistry, Physical
Ziang Su et al.
Summary: Metal oxide catalysts like CeO2 have potential applications in replacing noble metal catalysts for catalytic oxidation of VOCs. The function and activity of oxygen vacancies as active sites in VOC elimination remain unclear due to the difficulty in tracking their dynamic evolution. CeO2-based catalysts with varying oxygen vacancy concentrations were synthesized, and the evolution of oxygen vacancies and species were directly followed. The results revealed that oxygen vacancies participate in subsurface storage and diffusion of reactive oxygen species, providing additional oxygen species when needed.
Article
Nanoscience & Nanotechnology
Chunle Zhang et al.
Summary: A series of Co3O4 with different surface defective structures were prepared and tested for the benzene oxidation activity. The choice of synthetic solvent had a significant impact on their composition and physicochemical properties. Co3O4 prepared with triethylene glycol (Co-TEG) exhibited the highest compressive strain, affecting its surface chemical structure and low-temperature redox properties. Co-TEG showed the best benzene oxidation activity thanks to its abundant adsorbed and lattice oxygen, promoting the conversion of benzene and intermediates at low temperature.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Zenghua Xie et al.
Summary: Developing efficient catalysts for low-temperature catalytic oxidation of toluene is challenging. In this study, CeO2 is modified with methanol to introduce OH groups and oxygen vacancies for catalytic oxidation of toluene. The modified CeO2, CeO2-T-M, shows the highest catalytic activity for toluene oxidation at a temperature of 235 oC. Abundant OH groups and oxygen vacancies on CeO2-T-M are found to be correlated with the catalytic activity, facilitating the adsorption and activation of gaseous oxygen and toluene, as well as the regeneration of consumed OH groups with activated lattice oxygen.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Engineering, Environmental
Jian-Rong Li et al.
Summary: The study fabricated Mn-Al oxides with strengthened synergistic effects of Mn and Al species by adjusting the calcination temperature. Different temperatures effectively controlled the surface Mn/Al ratio and KMn8O16 phase, leading to significant changes in CO2 selectivity, reaction rate, and stability for catalytic oxidation. Mn5Al-350 catalyst exhibited the best performance with a high CO2 selectivity and superior catalytic stability. Reaction intermediates and theoretical calculations provided insights into the reaction mechanism.
ACS ES&T ENGINEERING
(2023)
Article
Chemistry, Physical
Shuo Chen et al.
Summary: In this study, Pt/SiO2 catalysts with tailored silanol density were prepared by impregnating Pt NPs onto commercial SiO2 treated with hexamethyldisilazane passivation. The catalytic tests showed that high surface silanol density led to lower apparent activation energy, allowing for the total oxidation of formaldehyde in dry and wet conditions. DFT calculations demonstrated the critical role of silanols in the interaction and oxidation of formaldehyde over the Pt/SiO2 catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Daiqiang Li et al.
Summary: In this study, regulation of active sites in zeolites with different Si/Al ratios was used to achieve Pt/Beta catalysts with different valence states, locations, and dispersion of Pt for toluene oxidation. The Pt/Beta catalysts with high silica showed better catalytic oxidation performance than those with low silica, due to the stronger activation ability towards O2 and more facile oxygen replenishment of Pt0. Moreover, Pt0 was found to be more conducive to the benzene ring opening reaction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Yanfei Zheng et al.
Summary: In this study, a vertically oriented Cu(OH)2 nanorod was in situ grown on copper foam (CF) to synthesize CoCu-MOF catalyst, which showed excellent performance in acetone oxidation. The optimized catalyst demonstrated satisfactory stability in long-term, cycle, water resistance, and high airspeed tests. This research provides a novel strategy for designing efficient monolithic catalysts for VOC oxidation and other environmental applications.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Zeyu Zhao et al.
Summary: The presence of H2O vapor has a significant impact on the catalytic oxidation of acetaldehyde with different MnO2 phases, promoting the reaction at moderate temperatures and hindering it at high temperatures.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Review
Engineering, Environmental
Kai Zhang et al.
Summary: Volatile organic compounds (VOCs) are toxic and damaging to the environment and human body. Catalytic oxidation technology is an effective method for VOC degradation, offering advantages such as high efficiency, low energy consumption, safety, and minimal secondary pollution. This paper introduces the catalytic oxidation technology for VOC degradation and the development of single metal oxide catalysts, focusing on the application and influencing factors of composite metal oxide catalysts for VOC removal.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Ruosi Peng et al.
Summary: This study investigates the effect of lanthanide doping on the physicochemical properties and catalytic activity of Pt/CeO2 catalysts for toluene oxidation. The results demonstrate a significant impact of lanthanide doping on the catalyst activity, which is closely related to the ion radius and valence state of the dopants. Doping with Gd enhances the catalytic oxidation of toluene over Pt/CeO2 catalyst, possibly by promoting the formation of Gd-Ce complexes and oxygen vacancies.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Yifei Li et al.
Summary: Coexistence of cobalt defects and oxygen vacancies has a significant effect on the performance of catalysts, improving the catalytic activity for toluene oxidation. A Co3-xO4-y catalyst with both cobalt defects and oxygen vacancies was synthesized, achieving over 90% toluene conversion under light illumination for 10 minutes at a temperature of around 180 degrees Celsius. Cobalt defects promote the formation of oxygen vacancies, which accelerate the conversion of intermediates and promote the degradation of toluene.
Article
Engineering, Environmental
Zhenpeng Huang et al.
Summary: This study demonstrates that phosphorus modification can enhance the catalytic performance of Pt/CeO2 catalyst in the total oxidation of light alkane by modulating its acidity and redox property. Phosphorus modification increases the acidity and the ability of the catalyst to activate C-H bond, while partially restoring its redox property.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Mingjiao Tian et al.
Summary: In this study, Ru/MnCo3Ox catalysts were rationally fabricated, exhibiting excellent activity, reaction durability, and superior chlorine transformation ability for the destruction of 1,2-dichloroethane (1,2-DCE). Under humid conditions, the desorption of chlorine species over Ru-based catalysts was significantly promoted, effectively suppressing the formation of polychlorinated byproducts.
Article
Chemistry, Physical
Huayu Gu et al.
Summary: This study systematically investigates the mechanism of water in lattice oxygen activation of transition metal oxides. It demonstrates that water molecules can activate lattice oxygen to form hydroxyl species and attack electron-deficient carbon atoms of VOCs due to their strong nucleophilicity. This research is of great significance for understanding the role of water in catalysis, such as VOC combustion and water splitting.
Article
Nanoscience & Nanotechnology
Lixin Zhang et al.
Summary: The strength of the strong metal-support interactions (SMSIs) between Pt and the OMS-2 support in Pt/OMS-2 catalyst can be regulated by changing calcination temperatures. The catalyst calcined at 300 degrees C (Pt/OMS-2-300) shows the best performance in catalytic combustion of toluene. The abundant Pt2+-O-v-Mn delta+ species at the Pt-MnO2 interface in Pt/OMS-2-300 can enhance the adsorption and activation of toluene, promoting its catalytic performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Environmental
Ying Feng et al.
Summary: In this study, a high-efficiency and energy-saving synergistic photothermocatalytic oxidation approach was developed to eliminate high concentrations of VOCs in cooking oil fumes. The Pt/CeO2/TiO2 catalyst exhibited excellent catalytic stability and water resistance, and the reactive oxygen species generated by the synergistic interaction of photo- and thermocatalysis played a crucial role in VOC oxidation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Zhilin Zhang et al.
Summary: The properties of the support have a significant impact on the state of noble metals in supported catalysts. In this study, a simple method was developed to regulate the types and contents of surface OH groups using Al2O3 as a model. The treated Al2O3 supports with different content of terminal OH groups were used to prepare Pt-Na/Al2O3 samples, which exhibited excellent catalytic performance in formaldehyde oxidation. This strategy provides new insights for regulating supports and changing the state of noble metals, facilitating the synthesis of efficient heterogeneous catalysts.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Wenyu Zhou et al.
Summary: This study used density functional theory (DFT) to investigate defective MoS2 with different numbers of sulfur vacancies. The research found that at a low S-vacancy concentration, vacancies tend to agglomerate, while at a higher concentration, a combination of local point defects and clustered vacancy chains is preferred. The coupling between S-vacancies leads to decreased band gap and increased Mo-H adsorption strength with increasing vacancy concentration.
Article
Chemistry, Physical
Chunying Wang et al.
Summary: Metal oxides are commonly used as supports in noble metal-based catalysts for formaldehyde oxidation, but this study demonstrates the successful application of activated carbon, a nonoxide support, for Pt catalysts in HCHO oxidation. The addition of alkali metal Na enhances the stability of Pt species, increases Pt dispersion, and improves the activation of chemisorbed oxygen and water, leading to direct conversion of HCHO to CO2 and H2O on the Na-Pt/AC-R catalyst. This research extends the promotional effect of alkali metals on supported Pt catalysts to a nonoxide carrier system.
Article
Chemistry, Physical
Yang Chen et al.
Summary: This study found that Pt nanoparticles supported on an inert substrate can catalyze total CO conversion and CO2 selectivity over a broad temperature range, depending on the local structure of Pt active centers. The ensemble of Pt(OH) and metallic Pt plays a critical role in this process.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Review
Engineering, Environmental
Peng Wu et al.
Summary: This article summarizes the recent research and development on various manganese-based oxide catalysts for the purification of VOCs through thermocatalytic and photo/thermocatalytic processes. It reviews single manganese oxides, manganese-based oxide composites, and improvement strategies such as morphology regulation, heterojunction engineering, and surface decoration. The discussion also includes manganese-based monoliths for practical VOCs abatement and relevant catalytic mechanisms, as well as the existing problems and prospects for manganese-based oxide catalysts in catalyzing the combustion of VOCs.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Yuanqiong Liu et al.
Summary: Novel activated carbon (biomass-HCO) was prepared to facilitate the catalytic oxidation of benzene, demonstrating strong interaction between Pt nanoparticles and carbon supports, leading to improved activity and thermal stability of the catalyst. Results indicate the potential application of biomass-HCO as a catalytic support for the oxidation of volatile organic compounds.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Xiuqing Hao et al.
Summary: In this study, nanotubular OMS-2 support was synthesized using a hydrothermal redox reaction and used to prepare single-atom Pt and Pt-NP catalysts for benzene oxidation. The 0.0383Pt(1)/OMS-2 catalyst exhibited the best catalytic performance with a 90% benzene conversion rate achieved.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Multidisciplinary Sciences
Kun Yu et al.
Summary: This study demonstrated efficient catalytic combustion of toluene over Pt/gamma-Al2O3 catalysts by tailoring active Pt species spatially. The catalyst with low Pt-content showed super activity and water-resistant stability. The strong metal-support interaction at the Al-OH-Pt interfaces elongated the Pt-O bond and contributed to the oxidation of toluene.
Review
Chemistry, Applied
Hongxia Chen et al.
Article
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Zhen Cheng et al.
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
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Tareque Odoom-Wubah et al.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
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Qun Li et al.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2020)
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Shunzheng Zhao et al.
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Yongjie Shen et al.
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(2020)
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Yang Chen et al.
Article
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Kazumasa Murata et al.
Review
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Chi He et al.
Article
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Qun Li et al.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2019)
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Leo DeRita et al.
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(2019)
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Aolin Lu et al.
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APPLIED CATALYSIS A-GENERAL
(2018)
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Hongling Yang et al.
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Yaobin Li et al.
Article
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Chunyu Chen et al.
CHEMICAL COMMUNICATIONS
(2015)
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Chemistry, Analytical
A. Nagoya et al.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2015)
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Chemistry, Physical
Michail Stamatakis et al.
JOURNAL OF PHYSICAL CHEMISTRY C
(2011)
Article
Physics, Multidisciplinary
F. Abild-Pedersen et al.
PHYSICAL REVIEW LETTERS
(2007)
Article
Chemistry, Multidisciplinary
Stefan Grimme
JOURNAL OF COMPUTATIONAL CHEMISTRY
(2006)
Article
Chemistry, Physical
T Jacob et al.
JOURNAL OF PHYSICAL CHEMISTRY B
(2003)
Article
Materials Science, Multidisciplinary
A Eichler et al.
