Repositorio de producción científica de la Universidad de Sevilla

High catalytic activity of Au/CeO x/TiO 2(110) controlled by the nature of the mixed-metal oxide at the nanometer level

Opened Access High catalytic activity of Au/CeO x/TiO 2(110) controlled by the nature of the mixed-metal oxide at the nanometer level

Citas

buscar en

Estadísticas
Icon
Exportar a
Autor: Park, Joon B.
Graciani Alonso, Jesús
Evans, Jaime
Stacchiola, Dario
Ma, Shuguo
Liu, Ping
Nambu, Akira
Fernández Sanz, Javier
Hrbek, Jan
Rodriguez, José A.
Departamento: Universidad de Sevilla. Departamento de Química Física
Fecha: 2009
Tipo de documento: Artículo
Resumen: Mixed-metal oxides play a very important role in many areas of chemistry, physics, materials science, and geochemistry. Recently, there has been a strong interest in understanding phenomena associated with the deposition of oxide nanoparticles on the surface of a second (host) oxide. Here, scanning tunneling microscopy, photoemission, and density-functional calculations are used to study the behavior of ceria nanoparticles deposited on a TiO2(110) surface. The titania substrate imposes nontypical coordination modes on the ceria nanoparticles. In the CeO x/TiO 2(110) systems, the Ce cations adopt an structural geometry and an oxidation state (+3) that are quite different from those seen in bulk ceria or for ceria nanoparticles deposited on metal substrates. The increase in the stability of the Ce 3+ oxidation state leads to an enhancement in the chemical and catalytic activity of the ceria nanoparticles. The codeposition of ceria and gold nanoparticles on a TiO 2(110) substrate generat...
[Ver más]
Tamaño: 1.489Mb
Formato: PDF

URI: https://hdl.handle.net/11441/69495

DOI: 10.1073/pnas.0812604106

Ver versión del editor

Mostrar el registro completo del ítem


Esta obra está bajo una Licencia Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internacional

Este registro aparece en las siguientes colecciones