Structural, optical and electrical properties of CeO2 thin films simultaneously prepared by anodic and cathodic electrodeposition

Yang, Yefeng; Du, Xiaoqing; Yi, Chenxi; Liu, Jiao; Zhu, Baojun; Zhang, Zhao

doi:10.1016/j.apsusc.2018.01.179

Cited by 19 publications

(20 citation statements)

References 68 publications

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“…For the corresponding O 1s XPS peaks (Figure c2), the lower BE peak around 529.5 eV was attributed to the lattice oxygen (O 2– ) of Ce oxides. This peak became more clear for the CP-AuNP-STpy electrode after dipping in the Ce(IV) electrolyte. ,, This indicates that the lattice oxygen was mainly because of Ce(IV) oxide. The broad higher BE peak was due to adsorbed OH/H 2 O, trapped SO 4 2– , and/or oxygen vacancies.…”

Section: Resultsmentioning

confidence: 89%

“…no. 034-0394) of CeO 2 , respectively. ,, For the CP after Ce electrodeposition, the XRD signals from the CP support were the weakest, indicating that the electrodeposited overlayer material was the thickest. The relative I (111)/ I (200) XRD peak ratios were estimated to be 3.53, 1.81, and 2.09 for CP, CP-AuNP, and CP-AuNP-STpy electrodes, respectively.…”

Section: Resultsmentioning

confidence: 97%

“…The two dominant XPS peaks were attributed to the Ce(III) oxidation state, indicated by the ★ symbol. ,,, Two shoulders around 882 and 901 eV were assigned to the Ce 3d 5/2 and Ce 3d 3/2 peaks for the Ce(IV) oxidation state. A corresponding satellite peak for the Ce(IV) oxidation state was very weakly observed around 917 eV. ,,, This result reflects that the Ce oxidation state for the CP electrode was dominantly a +3 state (★). For the CP-AuNP electrode after amperometry, the Ce 3d 5/2 and Ce 3d 3/2 peaks for the Ce(IV) oxidation state were significantly enhanced.…”

Section: Resultsmentioning

confidence: 99%

“…HRTEM images were obtained for selected two samples of CP (nanoneedles, Figure a2) and CP-AuNP-STpy (ultrasmall NPs, Figure c2) electrodes after amperometry at −1.3 V for 12 h. The HRTEM images showed clear lattice fringes with distances of 0.32, 0.27, and 0.19 nm, corresponding to the (111), (200), and (220) crystal planes of the cubic phase ( Fm 3 m ) CeO 2 . ,, The nanoneedle showed mainly (111) planes, while the NPs showed other planes of (200), as further discussed below. For visual understanding, the structure projections of the crystal planes of CeO 2 are displayed in Figure .…”

Section: Resultsmentioning

confidence: 99%

“…The recycling and treatment of Ln and An elements are extremely important for radiowastes, used nuclear fuels, and Ln-containing industry wastes. ,,− To achieve this goal, the electrodeposition method has extensively been demonstrated for electrochemical recovery in diverse conditions of acidic, neutral, basic, ionic liquid, and molten salt conditions over different electrodes. ,,− Yang et al demonstrated the fabrication of CeO 2 thin films on stainless steel and indium tin oxide electrodes by the simultaneous anodic and cathodic electrodeposition . They showed that the oxidation state of Ce(III) and the crystal phase were altered by the applied potential and the electrode.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Electrochemical Ce(III)/Ce(IV) Redox Behavior and Ce Oxide Nanostructure Recovery over Thio-Terpyridine-Functionalized Au/Carbon Paper Electrodes

Park

Joo

Yang

et al. 2021

ACS Appl. Mater. Interfaces

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Understanding the electrochemical behaviors of Ce(III)/Ce(IV) ions is essential for better treatment, separation, and recycling of lanthanide (Ln) and actinide (An) elements. Herein, electrochemical redox behavior and interconversion of Ce(III)/Ce(IV) ions and their recoveries were demonstrated over newly developed thio-terpyridine-functionalized Au-modified carbon paper electrodes in acidic and neutral electrolytes. Cyclic voltammetry and amperometry were performed for the electrodes with and without thio-terpyridine functionalization. Ce oxide nanostructure recovery was successfully conducted by amperometry, and the electrodeposited nanostructured Ce materials were fully characterized by scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction crystallography, and X-ray photoelectron spectroscopy. Geometry optimization and the electronic energy state calculations were conducted by density functional theory at the B3LYP/GENECP level for the complexes of Ce(III) and Ce(IV) ions with the thio-terpyridine in an aqueous state. The present unique results provide valuable information on understanding redox behaviors of Ln and An ions for their recycling and treatment processes.

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Section: Resultsmentioning

confidence: 89%