LaMnO<sub>3</sub>(La<sub>0.8</sub>Sr<sub>0.2</sub>MnO<sub>3</sub>) Perovskites for Lean Methane Combustion: Effect of Synthesis Method

• 作者: Janusz Trawczyński Miros?aw Zawadzki Natalia Miniajluk W?odzimierz Tylus
• 来源期刊: 材料物理与化学进展(英文)
• 学科: 化学
• 关键词: PEROVSKITE Different Synthesis Method LEAN METHANE COMBUSTION COMBUSTION Rate Ventilation Air METHANE
• 年，卷（期）: clwlyhxjzyw_2018,（4）
• 页码范围: 193-215
• 页数: 23页
• 分类号: O6

摘要

The effect of the preparation method on the properties of LaMnO3 and La0.8Sr0.2MnO3 perovskite was studied. Materials were prepared by four methods: sol-gel, chemical combustion, solvothermal and spray pyrolysis and characterized. The effect of the synthesis method on the texture, acid-base character of the surface, reducibility with hydrogen, oxygen desorption, surface composition and catalytic activity for combustion of lean methane was studied. It was found that synthesis method affects physicochemical properties of obtained materials-solvothermally produced materials exhibit well-developed surface area, presence of reactive oxygen species on surface and high catalytic activity for CH4 combustion. Generally, LaMnO3 and La0.8Sr0.2MnO3 perovskites show catalytic activity for lean CH4 combustion comparable or higher than the activity of 0.5 wt.% Pt/Al2O3 but lower than 1 wt.% Pd/Al2O3.