TY  - JOUR
A1  - Yeste, Maria Pilar
A1  - Primus, Philipp-Alexander
A1  - Alcantara, Rodrigo
A1  - Cauqui, Miguel Angel
A1  - Calvino, Juan Jose
A1  - Pintado, José María
A1  - Blanco, Ginesa
T1  - Surface characterization of two Ce0.62Zr0.38O2 mixed oxides with different reducibility
JF  - Applied surface science : a journal devoted to applied physics and chemistry of surfaces and interfaces
N2  - This paper presents a study of the surface properties of two Ce/Zr mixed oxides with different reducibility, obtained by applying distinct thermal ageing treatments to an oxide with the composition Ce0.62Zr0.38O2. The surface composition was investigated by XPS. Chemical reactivity of the surface was studied by adsorption of the probe molecules CO2, D-2 and methanol. Nanostructural characterization was carried out by XRD, Raman and high-resolution Eu3+ spectroscopy (FLNS). The characterization showed only slight variations in surface composition and bulk Ce-Zr distribution, but hardy differences concerning the type and strength of acidic surface centres, as well as strong differences in the ability to dissociate hydrogen. Structural variations between both samples were identified by comparing the optical spectra of Eu3+ in surface doped samples.
KW  - Ce/Zr
KW  - Surface properties
KW  - Reactive adsorption
KW  - Hydrogen activation
Y1  - 2020
U6  - https://doi.org/10.1016/j.apsusc.2019.144255
SN  - 0169-4332
SN  - 1873-5584
VL  - 503
PB  - Elsevier
CY  - Amsterdam
ER  -