La0.8Sr0.2MnO3 Perovskite Catalysts Prepared by Different Methods for CO Oxidation

Huang, Xuehui; Chen, Hou; Li, Xiaobo; Pan, Hongyun; Song, Xiaozhan; Chang, Yu Wei

doi:10.1007/s10562-022-03921-8

Cited by 4 publications

(1 citation statement)

References 24 publications

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“…5b, the pore size distributions of the hysteresis loops of the four catalysts are slightly different, and all of them show a sharp peak at about 3.61 nm, possibly caused by the micropores resulting from nanocrystal aggregation. From the range of the weak peaks from 10 to 50 nm, a large number of mesopores from 10 ~ 50 nm exist in the four catalysts, which indicates that all four catalysts are mesoporous structures [20]. From the data in Table 1, it can be seen that the speci c surface area of mesoporous La 0.8 Sr 0.2 MnO 3 catalyst decreases and then increases with the increase of calcination temperature, and the pore diameter increases accordingly, and the pore volume is relatively stable.…”

Section: Characterization Of P-cok-12mentioning

confidence: 91%

Mesoporous La0.8Sr0.2MnO3/P-COK-12 catalyst synthesized by template method:Highly active for the complete oxidation of CO

Huang,

Hu,

Deng

et al. 2023

Preprint

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In this study, an environmentally friendly mesoporous material called COK-12 was created using inexpensive sodium silicate as a silica source and surfactant P123 as a soft template. COK-12 was then modified with p-xylene to produce a template called P-COK-12, which had a compact and well-ordered pore structure. For the first time, this modified mesoporous material was used as a template to prepare a mesoporous La0.8Sr0.2MnO3 (LSM) catalyst through a combination of the nano-casting and sol-gel methods. The results showed that the LSM-550 catalyst, synthesized at 550 °C for 2 hours, had a large specific surface area of 72.11 m2/g and the highest molar ratio of surface Mn4+/Mn3+ and Oads/Olat. Additionally, the CO conversion results for different LSM-T samples (T=550, 600, 650, 700 °C) indicated that the LSM-550 sample exhibited the best catalytic activity, with T50 of 180 °C and T90 of 218 °C, as well as excellent stability.

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Section: Characterization Of P-cok-12mentioning

confidence: 91%

Mesoporous La0.8Sr0.2MnO3/P-COK-12 catalyst synthesized by template method:Highly active for the complete oxidation of CO

Huang,

Hu,

Deng

et al. 2023

Preprint

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Insight into the Interaction of Perovskite-Like Surfaces (LaMnO3 and LaCoO3) with Ar, H2, CO, and O2 through NAP-XPS Analysis

Tapia-P.,

Gallego,

Gamba

et al. 2024

Catal Lett

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Perovskite-like oxides present huge chemical variability and a wide range of applications as catalysts for oxidation reactions. The interaction of several small gas molecules with the surface of LaCoO3 and LaMnO3 perovskite-like oxides was studied by Near Ambient Pressure X-ray photoelectron spectroscopy (NAP-XPS) and CO Temperature Programmed Desorption (CO-TPD). Surface chemical changes such as the Osurf/Olattice and cation B oxidation state ratios were analyzed as a function of temperature (400 K, 450 K, 500 K, 550 K, and 650 K) under different gas atmospheres like Ar, CO, H2, and O2. It was found that there was a partial surface reduction when H2 and CO were used in the reaction, and therefore, the cation B oxidation state (Mn4+/Mn3+ and Co3+/Co2+) ratio decreased. Under the CO stream, carbonate species were formed, presenting a C1s signal between 284.5 eV and 287 eV. The CO2 evolution during the reaction at temperatures greater than 500 K was associated with CO activation over or near to surface oxygen species. A Mars-van Krevelen mechanism was proposed for the process, finding significant differences between LaCoO3 and LaMnO3 perovskite-like solid catalysts behavior. Graphical Abstract

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Important factors of the A-site deficient Mn perovskites design affecting the CO oxidation activity

Mane,

Kim,

Han

et al. 2024

Catalysis Today

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La0.8Sr0.2MnO3 Perovskite Catalysts Prepared by Different Methods for CO Oxidation

Cited by 4 publications

References 24 publications

Mesoporous La0.8Sr0.2MnO3/P-COK-12 catalyst synthesized by template method:Highly active for the complete oxidation of CO

Mesoporous La0.8Sr0.2MnO3/P-COK-12 catalyst synthesized by template method:Highly active for the complete oxidation of CO

Insight into the Interaction of Perovskite-Like Surfaces (LaMnO3 and LaCoO3) with Ar, H2, CO, and O2 through NAP-XPS Analysis

Important factors of the A-site deficient Mn perovskites design affecting the CO oxidation activity

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