The variation of microstructures,spectral characteristics and catalysis effects of Fe^3+ and Zn^2+ co-doped CeO2 solid solutions

作     者：Guofang Zhang Yiming Li Xin Zhao Jianyi Xu Yanghuan Zhang Guofang Zhang;Yiming Li;Xin Zhao;Jianyi Xu;Yanghuan Zhang

作者机构：School of Material and MetallurgyInner Mongolia University of Science and TechnologyBaotou 014010China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2020年第38卷第3期

页      面：241-249页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0708[理学-地球物理学] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(51962028,51501095) the Natural Science Foundation of Inner Mongolia(2017MS(LH)0516,2018MS05040,2018BS05010,2017MS(LH)0519) the Innovation Fund of Inner Mongolia University of Science and Technology(2018YQL02). 

主　　题：Ce1-x(Fe0.5Zn0.5)xO2 solid solutions Hydrothermal method Hydrogen storage Catalysis Rare earths 

摘      要：Fe^3+and Zn^2+ions were doped into the lattice of CeO2 via the hydrothermal method.The micro structure and spectra features were analyzed systemically.XRD results show that the solid solubility of Fe^3+and Zn^2+ions in Ce1-x(Fe0.5Zn0.5)xO2 can be identified as x=0.16.The cell volumes are decreased by increasing the doped content.The TEM graphs prove that the grain size of the sample is about 10 nm,and the EDS result indicates that the doped contents are in accordance with that of the theory concentrations.Meanwhile,the doping also causes the increasing concentrations of the defects and oxygen vacancies which are supported by the XPS,Raman,UV and PL characterizations.The samples exhibit better catalytic activities for improving the hydrogen storage properties and the electrochemical kinetics of the ball milled Mg2Ni based composites.Further,the catalysis effects are improved by increasing the doped contents,which can be ascribed to the increasing contents of the oxygen vacancies,defects,the special electron transition states and the nature of the doped ions in CeO2-based solid solutions.