%0 Journal Article 
%A Sánchez Gil, Juan José
%A López Haro, Miguel
%A Hernández Garrido, Juan Carlos
%A Blanco Montilla, Ginesa
%A Cauqui López, Miguel Ángel
%A Rodríguez-Izquierdo Gil, José María
%A Pérez Omil, José Antonio
%A Calvino Gámez, José Juan
%A Yeste Siguenza, María del Pilar
%T An atomically efficient, highly stable and redox active Ce0.5Tb0.5Ox (3% mol.)/MagO catalyst for total oxidation of methane
%D 2019
%@ 2050-7488
%U http://hdl.handle.net/10498/30220
%X Redox and	 catalytic performance in total methane oxidation of a nanostructured ceria-terbia catalyst supported	on magnesia is presented and compared to that of a pure ceria	catalyst supported on	 MgO.	 The	 investigated material, Ce0.5Tb0.5Ox (3%	mol.)/MgO, features	several remarkable properties: a quite low total molar loading of the two lanthanide elements, high reducibility as	well	as	very	high	oxygen storage capacity at low	temperatures and higher catalytic activity	 than MgO supported	 CeO2. In terms	of lanthanide atomic	content terms, the catalytic performance	of Ce0.5Tb0.5Ox (3% mol.)/MgO largely	improves that of bulk type ceria and	ceria-magnesia	solid solutions.	Such	behavior implies a proper	optimization in	the usage	of the lanthanide elements. A	second contribution to atomic economy in	the catalyst design relates	to the fact that	the novel	formulation demonstrates	a good stability	in the redox and catalytic	performance against very high	
temperature treatments. An investigation of the structure	of both the fresh and high	temperature-aged catalyst at atomic scale, by means of complementary aberration corrected microscopy techniques, reveals the occurrence of a variety of highly dispersed, exotic, lanthanide-containing	 nanostructures,	 which span from isolated, atomically	dispersed,	Ln species, to nanometer-sized	 CeTbO2-x patches,	 extended	CeTbO2-x bilayers and 3D CeTbO2-x nanoparticles. Nanoanalytical results evidence mixing	of	the two lanthanides at atomic levels	in these nanostructures. The combined effect of nanostructuring, mixing of the lanthanides at atomic level and interaction with the MgO oxide are at the roots of	the	 improvement in functional, redox and catalytic	properties	of the novel Ce0.5Tb0.5Ox (3%	mol.)/MgO catalyst.
%K Cerium Oxide
%K Cerium Terbium Mixed Oxides
%K Catalyst
%K methane oxidation
%K oxygen storage capacity
%K OSC
%K MgO
%K HRTEM
%K Electron Microscopy
%K HAADF-STEM
%~ Universidad de Cádiz