XPS study of ion irradiated and unirradiated CeO2 bulk and thin film samples

Maslakov, K. I.; Teterin, Yury A.; Popel, Aleksej J.; Teterin, A. Yu.; Иванов, К. Е.; Kalmykov, Stepan N.; Петров, В. Г.; Petrov, Peter K.; Farnan, Ian

doi:10.1016/j.apsusc.2018.04.077

Cited by 173 publications

(103 citation statements)

References 64 publications

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“…The six most prominent peaks of these spectra are attributable to Ce 4+ ions. 33 This indicates that Ce 4+ was the dominant cerium species in all three samples. The peak ttings (dashed lines) in panels G, H and I are based on the method by Maslakov et al.…”

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confidence: 74%

“…The peak ttings (dashed lines) in panels G, H and I are based on the method by Maslakov et al. 33 The tting based deconvolution of Ce 3d XPS spectra indicates that the concentration of surface Ce 3+ in all these samples is <3%. Such a low abundance of surface Ce 3+ is also supported by the absence of a shoulder peak of Ce 4f electrons at $1.1 eV in the XPS valence band spectrum of the CeNRs samples ( Fig.…”

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confidence: 96%

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Antioxidant activity of cerium dioxide nanoparticles and nanorods in scavenging hydroxyl radicals

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confidence: 74%

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confidence: 96%

Antioxidant activity of cerium dioxide nanoparticles and nanorods in scavenging hydroxyl radicals

et al. 2019

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“…2). The Ce 3d peak at 877.8 eV can be assigned to Ce 4+ [45][46][47]. The observed Ce 3d peak was really weak, showing very few loading amounts of Ce ions.…”

Section: Characterizationmentioning

confidence: 94%

Improving the photocatalytic hydrogen evolution of UiO-67 by incorporating Ce4+-coordinated bipyridinedicarboxylate ligands

Liu

Bian

et al. 2019

Science Bulletin

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“…6 X-ray photoelectron spectroscopy (XPS) has been widely used for the study of the electronic structure of CeO 2 . [7][8][9][10][11] The core and valence XPS spectra of cerium compounds are complicated and structured. This complicates the determination of the oxidation state of cerium on the basis of chemical shifts.…”

Section: Introductionmentioning

confidence: 99%

The electronic structure and the nature of the chemical bond in CeO₂

Maslakov

Teterin

Ryzhkov

et al. 2018

Phys. Chem. Chem. Phys.

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The X-ray photoelectron spectral structure of CeO2 valence electrons in the binding energy range of 0 to ∼50 eV was analyzed. The core-electron spectral structure parameters and the results of relativistic discrete-variational calculations of CeO8 and Ce63O216 clusters were taken into account. Comparison of the valence and the core-electron spectral structures showed that the formation of the inner (IVMO) and the outer (OVMO) valence molecular orbitals contributes to the spectral structure more than the many-body processes. The Ce 4f electrons were established to participate directly in chemical bond formation in CeO2 losing partially their f character. They were found to be localized mostly within the outer valence band. The Ce 5p atomic orbitals were shown to participate in the formation of both the inner and the outer valence molecular orbitals (MOs). A large part in the IVMO formation is taken by the filled Ce 5p1/2, 5p3/2 and O 2s atomic shells, while the Ce 5s electrons participate weakly in the chemical bond formation. The composition and the sequent order of the molecular orbitals in the binding energy range of 0 to ∼50 eV were established. A quantitative scheme for the molecular orbitals of CeO2 was built. This scheme is fundamental for understanding the nature of chemical bonding and also for the interpretation of other X-ray spectra of CeO2. Evaluations revealed that the IVMO electrons weaken the chemical bond formed by the OVMO electrons by 37%.

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XPS study of ion irradiated and unirradiated CeO2 bulk and thin film samples

Cited by 173 publications

References 64 publications

Antioxidant activity of cerium dioxide nanoparticles and nanorods in scavenging hydroxyl radicals

Antioxidant activity of cerium dioxide nanoparticles and nanorods in scavenging hydroxyl radicals

Improving the photocatalytic hydrogen evolution of UiO-67 by incorporating Ce4+-coordinated bipyridinedicarboxylate ligands

The electronic structure and the nature of the chemical bond in CeO₂

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XPS study of ion irradiated and unirradiated CeO2 bulk and thin film samples

Cited by 173 publications

References 64 publications

Antioxidant activity of cerium dioxide nanoparticles and nanorods in scavenging hydroxyl radicals

Antioxidant activity of cerium dioxide nanoparticles and nanorods in scavenging hydroxyl radicals

Improving the photocatalytic hydrogen evolution of UiO-67 by incorporating Ce4+-coordinated bipyridinedicarboxylate ligands

The electronic structure and the nature of the chemical bond in CeO2

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The electronic structure and the nature of the chemical bond in CeO₂