Journal ArticleDOI
Satellite structure in the X-ray photoelectron spectra of some binary and mixed oxides of lanthanum and cerium
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In this paper, a study of the core-electron X-ray photoelectron (X-p) spectra of the f0 compounds La2O3, LaMO3(M = Fe and Co), CeO2, and BaCeO3 is described.Abstract:
A study of the core-electron X-ray photoelectron (X-p.e.) spectra of the f0 compounds La2O3, LaMO3(M = Fe and Co), CeO2, and BaCeO3 is described. Results on the chelate species [La(tmhd)3] and [Ce(tmhd)4](tmhd = 2,2,6,6-tetramethylheptane-3,5-dionato) are included for comparison. Special precautions have been taken to ensure an optimal degree of surface purity of the samples. Satellite structure has been observed for the 4p, in addition to the 3d and 4d, signals in both the lanthanum(III) and cerium(IV) compounds. These satellites arc discussed in terms of coexcitations of the charge-transfer type, principally O 2p→ metal 4f transitions. In the cerium(IV) oxides the satellites are apparently due to energy-gain (representing ‘ shake-down ’) rather than energy-loss (shake-up) processes.read more
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Catalytic Properties of Ceria and CeO2-Containing Materials
TL;DR: A survey of the use of cerium oxide and CeO2-containing materials as oxidation and reduction catalysts is presented in this paper, with a special focus on catalytic interaction with small molecules such as hydrogen, carbon monoxide, oxygen, and nitric oxide.
Journal ArticleDOI
Oxygen vacancies in transition metal and rare earth oxides: Current state of understanding and remaining challenges
TL;DR: In this article, structural and electronic properties and energetic quantities related to the formation of oxygen defects at transition metal (TM) and rare earth (RE) oxide surfaces, neutral oxygen vacancies in particular, play a major role in a variety of technological applications.
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Magnetic Nanoscaled Fe3O4/CeO2 Composite as an Efficient Fenton-Like Heterogeneous Catalyst for Degradation of 4-Chlorophenol
Lejin Xu,Jianlong Wang +1 more
TL;DR: The high utilization efficiency of H(2)O(2), calculated as 79.2%, showed a promising application of the catalyst in the oxidative degradation of organic pollutants, and the reusability of Fe(3)O (4)/CeO (2) composite was investigated after six successive runs.
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Electron spectroscopy of single crystal and polycrystalline cerium oxide surfaces
TL;DR: In this paper, the binding energy peaks in the O 1s XAS spectrum were identified for oxidized and sputtered single crystal CeO 2 films and for oxidised Ce foil, and features were identified that distinguish between the Ce 4+ or Ce 3+ oxidation states.
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Ce 3d XPS investigation of cerium oxides and mixed cerium oxide (CexTiyOz)
TL;DR: In this article, an XPS study of Ce 3D emission spectra dominated by atomic multiplet effects in core level spectroscopy of rare earth compounds (Ce oxides) was presented.