02 纳米Zn_(1-2x)Ce_xFe_xO微观结构及其对Mg基合金催化性能研究

张国芳;许剑轶;于海澍;陈超;

• 1:内蒙古科技大学材料与冶金学院

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摘要(Abstract)：                

采用水热法制备了Ce~(4+)及Fe~(3+)离子共掺杂纳米ZnO固溶体.系统研究了Zn_(1-2x)Ce_xFe_xO固溶体的微观结构及其对Mg基储氢合金的催化性能.XRD结果表明,Ce~(4+)及Fe~(3+)离子在ZnO中的固溶限x低于0.03.随掺杂浓度的增大,样品晶粒尺寸及晶胞参数均增加.紫外可见光谱表明,固溶体的能隙明显红移.采用球磨法制备了Mg_2Ni-Ni-5 mol%Zn_(1-2x)Ce_xFe_xO复合材料,对复合材料的电化学储氢性能进行了系统测试.结果表明,掺杂ZnO固溶体能够提高复合材料的放电性能,但容量保持率略有降低.当x=0.02时,固溶体的综合催化性能最佳.Zn_(1-2x)Ce_xFe_xO固溶体催化性能与晶格中的氧空位浓度及电子跃迁性能等密切相关.

关键词(KeyWords)：                    Zn_(1-2x)Ce_xFe_xO固溶体;水热法;Mg_2Ni;电化学储氢性能;催化剂

基金项目(Foundation):                    国家自然科学基金资助项目(51962028,51501095);; 内蒙古自治区自然科学基金资助项目(2017MS(LH)0516,2017MSC(LH)0519);; 内蒙古科技大学创新基金资助项目(2018YQL02)

作者(Author):                    张国芳;许剑轶;于海澍;陈超;

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