Surface And Redox Characterization Of New Nanostructured Zro2@Ceo2 Systems With Potential Catalytic Applications

Ceria-zirconia mixed oxides are widely used as catalysts and catalytic supports. Nevertheless, due to economic and geo-strategic concerns, reducing and optimizing the lanthanide content in these formulations while preserving or even improving their excellent redox and catalytic properties has become a challenge for current research. In this context, the design of core@shell nanostructures arises as a feasible alternative to achieve the aforesaid goal. In the present work, a new nanostructured ZrO2@CeO2 system based on spherical and mesoporous zirconia cores coated by a well-dispersed nanometer-thick ceria layer has been prepared by a novel synthetic approach in 2 different steps: (1) synthesis of the zirconia cores by a sol-gel method and (2) coating with a thin ceria shell by controlled chemical precipitation. The resulting nanocomposite was characterized by several techniques, which clearly reveal its perfect core@shell nanostructure and enhanced reducibility as compared with pure ceria.

• Autores: Barroso Bogeat, Adrián; Nuñez Perez, Bernardo Enrique; Blanco, Ginesa; Pintado, José María; Hernández Garrido, Juan Carlos; Calvino Gámez, José Juan
• Tipo de recurso: Article of journal
• Fecha de publicación: 2018
• Institución: Corporación Universidad de la Costa
• Repositorio: REDICUC - Repositorio CUC
• Idioma: eng
• OAI Identifier: oai:repositorio.cuc.edu.co:11323/981
• Acceso en línea: http://hdl.handle.net/11323/981; https://doi.org/10.1002/sia.6444; https://repositorio.cuc.edu.co/
• Palabra clave: Ceria-Zirconia; Core@Shell Nanostructure; Redox Characterization; Surface Characterization
• Rights: openAccess
• License: Atribución – No comercial – Compartir igual