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

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 La 0.8 Sr 0.2 MnO 3 (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 m 2 /g and the highest molar ratio of surface Mn 4+ /Mn 3+ and O ads /O lat . 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 T 50 of 180 °C and T 90 of 218 °C, as well as excellent stability.