Electrospun La0.8Ce0.2Fe1-xNixO3 perovskite nanofibrous catalysts for CO oxidation

• Published in: Applied surface science advances Vol. 2; p. 100030
• Main Authors: Ma, Yuxia, Ma, Yuyao, Long, Guorong, Buckley, C.E., Hu, Xun, Dong, Dehua
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2020; Elsevier
• Subjects: CO oxidation; Electrospinning; La0.8Ce0.2Fe1-xNixO3 perovskite; Nanofibrous catalyst; Thermal stability; Electrospinning; La0.8Ce0.2Fe1-xNixO3 perovskite; Nanofibrous catalyst; CO oxidation; Thermal stability
• ISSN: 2666-5239; 2666-5239
• DOI: 10.1016/j.apsadv.2020.100030

Carbon monoxide (CO) is one of the main pollutants of incomplete gasoline combustion from automotive and engines. Catalytic CO oxidation is an effective way to remove CO. La0.8Ce0.2Fe1-xNixO3 nanofibrous catalysts with high thermal stability were prepared by electrospinning in this study. The influence factors of La0.8Ce0.2Fe1-xNixO3 perovskite properties on CO oxidation were investigated. Calcination temperature affects catalyst crystallinity and hence catalytic activity. Increasing calcination temperature enhances crystallinity while decreases catalytic surface area, resulting in the highest catalytic activity at the calcination temperature of 800 °C. Oxygen vacancy in the perovskite increases catalyst activity. Doping Ni up to 20 mol% increases oxygen vacancy and oxygen storage capacity while excessive doping decreases perovskite crystallinity. The nanofibrous catalyst activity can be improved via reducing fiber diameters so as to increase catalytic surface area. The advantage of nanofibrous catalysts was confirmed by comparing with conventional powder catalysts. Therefore, high CO conversion can be achieved over the nanofibrous perovskite-type catalysts.