Charge redistribution at low oxygen vacancy concentrations in ceria have been studied in the framework of the density functional theory. We propose a model to approach the dilute limit using the results of supercell calculations. It allows one to reproduce the characteristic experimentally observed behavior of composition versus oxygen pressure dependency. We show that in the dilute limit the c...

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in this research calcium fluoride nanoparticles and its different amount of cerium ion dopant (5%and 10%) were prepared. the mentioned nanoparticle were studied by fourier transform infrared spectroscopy (ftir) , x-ray diffraction (xrd), absorption and photoluminescence spectra (pl) and scanning electron microscopy (sem). the xrd patterns indicate a typical cubic fluorite structure and no other...

Y. Li, J. G. He, X. X. Xue, H. Q. Ru, H. Yang School of Material and Metallurgy, Northeastern University, Shenyang, Liaoning, China. X. W. Huang, National Engineering Research Center for Rare Earth Materials, General Research Institute for Nonferrous Metals, and Grirem Advanced Materials Co., Ltd., Beijing,China In this paper the extraction and separation of cerium/fluorine in fluoride-bearing ...

An extraction method has been used to determine cerium144 in vegetation and soil. The principle advantages of the method are, (1) equilibration of cerium carrier and activity in the initial step of the procedure, (2) provision for the determination of strontium-90 and cesium-137 in vegetation and strontium-90 and normal cerium in soil. The results of measurements on fourteen wheat samples col l...

Radical-induced degradation of proton exchange membranes limits the durability proton-exchange membrane fuel cells. Cerium is widely used as a radical scavenger, but migration cerium ions to the...

nanostructured ceo2 powders were synthesized via a series of hydrothermal and solution precipitation methods. three different hydrothermal methods including 1:2 and 1:1 bi:ce molar ratios at 180 °c for 48 h (s1 and s2, respectively) without calcinations and 2:1 bi:ce molar ratio at 180 °c for 48 h with calcinations (s3) were performed successfully for the synthesis of the target nanomaterials. ...

Heterostructured Electrocatalysts In article number 2102413, Baocang Liu, Rui Gao, Jun Zhang, Bin and co-workers report the construction of a novel heterostructured electrocatalyst CePO4/MoP/carbon cloth (CC) constituting MoP nanobelts with surface-decorated CePO4 nanoparticles on CC for hydrogen evolution reaction (HER). The CePO4/MoP/CC exhibits low overpotential 48 mV at 10 mA cm−2 in alkali...