Research on micro–structure and catalysis properties of nanosized Ce 1−x (Fe 0.5 Eu 0.5 ) x O 2−δ solid solutions
作者： Guofang ZHANG , Jianyi XU , Zhonghui HOU , Qingchun WANG
DOI: 10.1016/S1002-0721(16)60175-8
关键词:
摘要: Abstract Nanosized Fe3+ and Eu3+ codoped CeO2 solid solutions were synthesized via hydrothermal method. The crystalline structure of Ce1−x(Fe0.5Eu0.5)xO2−δ (x=0.00–0.30) was carried out by the X–ray diffraction technique, spectrum features identified UV–Vis Raman spectroscopy, respectively. It observed that cell parameters first increased then decreased increasing doped ions content. phase separation detected when dopant concentration reached to x=0.30. showed width band gap gradually reduced content, solubility determined be x=0.20. technique displayed peak position F2g mode shifted lower frequencies from 465 cm−1 for x=0.00 440 catalytic effects on electrochemistry properties Mg2Ni/Ni measured mixing them together ball milling technique. electrochemical Mg2Ni/Ni–Ce1–x(Fe0.5Eu0.5)xO2−δ composites maximum discharge capability Cmax cycle stability improved obviously. Meanwhile, EIS characteristic also indicated could enhance rate charge transfer surface alloy. effect speculated rely both oxygen vacancies volumes solutions.
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