Journal Article

PUBDB-2024-06412

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Atomically Smooth Fully Hydroxylated CeO2(001) Films on YSZ(001)

Schober, J.-C. (Corresponding author)DESY* ; Beck, E. E.DESY* ; Kao, M.-C.DESY* ; Kohantorabi, M.DESY* ; Creutzburg, M.DESY* ; Novikov, D.DESY* ; Keller, T. F.DESY* ; Holtermann, B. ; Firman, N. ; Caulfield, L. ; Sauter, E. ; Vonk, V.XFEL.EU*DESY* ; Wöll, C. ; Wang, Y. ; Noei, H.DESY* ; Eggeler, Y. ; Stierle, A. (Corresponding author)DESY*

2024
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acs.jpcc.4c04438  doi:10.3204/PUBDB-2024-06412

Abstract: CeO2 is an important support material with redox properties interesting for heterogeneouscatalysis and energy conversion applications. Here, we present a facile growth procedurefor epitaxial CeO2(0 0 1) thin films supported by YSZ(0 0 1) suitable for combined catalyticactivity and structural investigations. The growth of the CeO2 thin films was performedusing standard ultra-high-vacuum (UHV) preparation techniques followed by tube furnaceannealing in air. Thorough characterization prior to and after the tube furnace annealingrevealed that this step induces significant restructuring of the film. Complete characterizationby atomic force microscopy (AFM), X-ray reflectivity (XRR), grazing incidence X-raydiffraction (GIXRD), cross-section high-resolution scanning tunneling electron microscopy(HR-STEM), X-ray photo-emission spectroscopy (XPS), and polarization-resolved infraredreflection absorption spectroscopy (IRRAS) showed that the film is fully oxidized and atomicallysmooth with a coherent crystal lattice over the full film thickness. A dislocation networkat the CeO2/YSZ interface compensates the lattice mismatch between film and the YSZ support,yielding a film with bulk lattice parameters. The bulk terminated surface is found tobe defect free with negligible amount of adsorption sites and stabilized by the presence ofhydroxyl groups for polarity compensation.

Note: L:MB

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Contributing Institute(s):

1. Nanolab (FS-NL)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. SFB 1441 A05 - Struktur und Zusammensetzung von PtPd Modellkatalysatoren unter operando Bedingun-gen: Experiment und Theorie (A05) (446698573) (446698573)

Experiment(s):

1. PETRA Beamline P23 (PETRA III)
2. DESY NanoLab: X-Ray Diffraction
3. DESY NanoLab: Surface Spectroscopy
4. DESY NanoLab: Sample Preparation
5. DESY NanoLab: Microscopy

Appears in the scientific report 2024

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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