Surface characterization of two Ce0.62Zr0.38O2 mixed oxides with different reducibility
- 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.
| Author details: | Maria Pilar YesteORCiD, Philipp-Alexander PrimusORCiDGND, Rodrigo AlcantaraORCiD, Miguel Angel CauquiORCiD, Juan Jose Calvino, José María PintadoORCiD, Ginesa BlancoORCiD |
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| DOI: | https://doi.org/10.1016/j.apsusc.2019.144255 |
| ISSN: | 0169-4332 |
| ISSN: | 1873-5584 |
| Title of parent work (English): | Applied surface science : a journal devoted to applied physics and chemistry of surfaces and interfaces |
| Publisher: | Elsevier |
| Place of publishing: | Amsterdam |
| Publication type: | Article |
| Language: | English |
| Date of first publication: | 2020/02/15 |
| Publication year: | 2020 |
| Release date: | 2023/03/24 |
| Tag: | Ce/Zr; Hydrogen activation; Reactive adsorption; Surface properties |
| Volume: | 503 |
| Article number: | 144255 |
| Number of pages: | 9 |
| Funding institution: | Ministry of Economy and Competitiveness of SpainSpanish Government; [MINECO/FEDER MAT2017-87579-R]; Junta de Andalucia (Spain)Junta de; AndaluciaEuropean Commission [FQM-110, FQM-334] |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie | |
| DDC classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften | |
| Peer review: | Referiert |
