Effects of H2O on HCHO and CO oxidation at room-temperature catalyzed by MCo2O4 (M=Mn, Ce and Cu) materials

Ma, Chunyan; Yang, Chenggong; Wang, Bin; Chen, Cheng; Wang, Fengbang; Yao, Xinglei; Song, Maoyong

doi:10.1016/j.apcatb.2019.04.085

Cited by 156 publications

(58 citation statements)

References 46 publications

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“…Based on the DRIFTS results shown here, along with other reported results, [13,50,51] a proposed mechanism for HCHO oxidation on MnO 2 @ALD@PP is illustrated in Figure 7d. In the proposed scheme, physisorbed O 2 dissociates into active oxygen radicals.…”

Section: In Situ Diffuse Reflectance Infrared Fourier Transform Spectsupporting

confidence: 77%

An Advanced Dual‐Function MnO₂‐Fabric Air Filter Combining Catalytic Oxidation of Formaldehyde and High‐Efficiency Fine Particulate Matter Removal

Dai

Zhu

Yan

et al. 2020

Adv Funct Materials

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Comprehensive treatment of indoor contaminants such as volatile organic compounds (VOCs) and fine particulate matter (PM 2.5) using transition metal oxide catalysts or functional fibrous filters has gained substantial attention recently. However, coupling VOC oxidation catalysts into high-performance filter systems remains a challenge. Herein, an overall solution to strongly bind manganese dioxide (MnO 2) nanocrystals onto polypropylene (PP) nonwoven fabrics is provided. For the first time, uniform heterogeneous nucleation and growth of MnO 2 onto PP nonwoven fabrics using intermediate inorganic nucleation films, including Al 2 O 3 , TiO 2 , and ZnO, formed conformally on the fabrics via atomic layer deposition (ALD) are demonstrated. How different ALD thin films influence the crystallinity, morphology, surface area, and surface oxygen species of the MnO 2 grown ALD-coated PP fibers is further investigated. In addition to uniformity and integrity, ZnO thin films give rise to MnO 2 crystals with the largest fraction of available surface oxygen, enabling 99.5% catalytic oxidation of formaldehyde within 60 min. Moreover, the metal oxide filters provide excellent PM removal efficiencies (ePM), achieving ePM 2.5 90% and ePM 10 98%, respectively, making the approach an outstanding method to produce fully dual-functional filtration media.

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Section: In Situ Diffuse Reflectance Infrared Fourier Transform Spectsupporting

confidence: 77%

An Advanced Dual‐Function MnO₂‐Fabric Air Filter Combining Catalytic Oxidation of Formaldehyde and High‐Efficiency Fine Particulate Matter Removal

Dai

Zhu

Yan

et al. 2020

Adv Funct Materials

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“…Also, It has been reported that CuO based catalysts have a degree of water resistance capacity. [ 43–45 ] The excellent low‐temperature catalytic performance and low‐cost of CuO/TiO 2 /Ti catalyst meet the application requirements of most occasions, such as vehicle exhaust, petrochemical industry etc.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of CuO/TiO₂/Ti Monolithic Catalyst for Efficient and Stable CO Oxidation

Tang

Wang

Liu

et al. 2021

Adv Materials Inter

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This work reports a novel strategy to in situ grow TiO2 nanosheets on flexible Ti mesh as ideal support, and to modify CuO active components through multi‐step methods. The CuO/TiO2/Ti monolithic catalyst can realize the complete CO oxidation at 110 °C without the assistance of any noble metal and the outstanding long‐term stability can be also achieved. When using urea as deposition precipitant, CuO particle size will increase obviously with the reaction time longer than 6 h, which is adverse to the catalytic performance, showing the significant impact of CuO particle size on the CO oxidation capability. The deposition reaction carried out in different solutions is also investigated and the results show that CuO/TiO2/Ti catalysts synthesized in acid and alkaline condition exhibit superior catalytic performance owing to the high content of Cu1+/0 and adsorbed oxygen species (Oα) on surface, large surface area, and excellent redox capacity compared with that in reductive solution. More importantly, the as‐synthesized CuO/TiO2/Ti monolithic catalysts show outstanding low‐temperature performance and excellent long‐term stability, indicating the overwhelming advantage of in situ grown catalysts. It is expected that the peculiar in situ growth technology is capable of extending to monolithic catalysts for multiple applications in the future.

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“…After the reaction mixture treatment for 40 min, the gas flow was changed to N 2 , and then a steady state was recorded at t = 120 min; the acquired spectrum shows a few more important intermediates. Along with different bidentate carbonate species, a new peak related to dioxymethylene (DOM) appeared at 1424 cm −1 [62]. The formation of this intermediate species indicates the slow hydrogenation of the formed formate intermediate during the steady state under N 2 flow.…”

Section: In Situ Drifts Analysismentioning

confidence: 99%

Evaluation of Au/ZrO2 Catalysts Prepared via Postsynthesis Methods in CO2 Hydrogenation to Methanol

et al. 2022

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Au nanoparticles supported on ZrO2 enhance its surface acidic/basic properties to produce a high yield of methanol via the hydrogenation of CO2. Amorphous ZrO2-supported 0.5–1 wt.% Au catalysts were synthesized by two methods, namely deposition precipitation (DP) and impregnation (IMP), characterized by a variety of techniques, and evaluated in the process of CO2 hydrogenation to methanol. The DP-method catalysts were highly advantageous over the IMP-method catalyst. The DP method delivered samples with a large surface area, along with the control of the Au particle size. The strength and number of acidic and basic sites was enhanced on the catalyst surface. These surface changes attributed to the DP method greatly improved the catalytic activity when compared to the IMP method. The variations in the surface sites due to different preparation methods exhibited a huge impact on the formation of important intermediates (formate, dioxymethylene and methoxy) and their rapid hydrogenation to methanol via the formate route, as revealed by means of in situ DRIFTS (diffuse reflectance infrared Fourier transform spectroscopy) analysis. Finally, the rate of formation of methanol was enhanced by the increased synergy between the metal and the support.

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Effects of H2O on HCHO and CO oxidation at room-temperature catalyzed by MCo2O4 (M=Mn, Ce and Cu) materials

Cited by 156 publications

References 46 publications

An Advanced Dual‐Function MnO₂‐Fabric Air Filter Combining Catalytic Oxidation of Formaldehyde and High‐Efficiency Fine Particulate Matter Removal

An Advanced Dual‐Function MnO₂‐Fabric Air Filter Combining Catalytic Oxidation of Formaldehyde and High‐Efficiency Fine Particulate Matter Removal

Fabrication of CuO/TiO₂/Ti Monolithic Catalyst for Efficient and Stable CO Oxidation

Evaluation of Au/ZrO2 Catalysts Prepared via Postsynthesis Methods in CO2 Hydrogenation to Methanol

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Effects of H2O on HCHO and CO oxidation at room-temperature catalyzed by MCo2O4 (M=Mn, Ce and Cu) materials

Cited by 156 publications

References 46 publications

An Advanced Dual‐Function MnO2‐Fabric Air Filter Combining Catalytic Oxidation of Formaldehyde and High‐Efficiency Fine Particulate Matter Removal

An Advanced Dual‐Function MnO2‐Fabric Air Filter Combining Catalytic Oxidation of Formaldehyde and High‐Efficiency Fine Particulate Matter Removal

Fabrication of CuO/TiO2/Ti Monolithic Catalyst for Efficient and Stable CO Oxidation

Evaluation of Au/ZrO2 Catalysts Prepared via Postsynthesis Methods in CO2 Hydrogenation to Methanol

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Product

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An Advanced Dual‐Function MnO₂‐Fabric Air Filter Combining Catalytic Oxidation of Formaldehyde and High‐Efficiency Fine Particulate Matter Removal

An Advanced Dual‐Function MnO₂‐Fabric Air Filter Combining Catalytic Oxidation of Formaldehyde and High‐Efficiency Fine Particulate Matter Removal

Fabrication of CuO/TiO₂/Ti Monolithic Catalyst for Efficient and Stable CO Oxidation