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Enhanced properties of Pd/CeO(2)-nanorods modified with alkaline-earth metals for catalytic oxidation of low-concentration methane

A series of Pd/CeO(2)-nanorods catalysts modified with alkaline-earth metals were prepared by the incipient impregnation method. Their catalytic properties in low-concentration methane oxidation were also investigated. The catalysts were characterized by X-ray diffraction, scanning electron microsco...

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Detalles Bibliográficos
Autores principales: Guo, Tianyu, Nie, Xiaorong, Du, Jianping, Li, Jinping
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9090572/
https://www.ncbi.nlm.nih.gov/pubmed/35559059
http://dx.doi.org/10.1039/c8ra07797e
Descripción
Sumario:A series of Pd/CeO(2)-nanorods catalysts modified with alkaline-earth metals were prepared by the incipient impregnation method. Their catalytic properties in low-concentration methane oxidation were also investigated. The catalysts were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and H(2)-temperature-programmed reduction techniques. The catalytic results show that the Ca element doped in Pd/CeO(2), with optimum molar ratio of Pd to Ca of 2 and calcination temperature of 450 °C, improved the properties of the Pd-based catalyst remarkably, which is attributed to strong Pd–support interaction and high oxygen mobility. Therefore, calcium is more suitable as a promoter for enhancing the activities of the Pd/CeO(2) catalyst in methane oxidation.