Phase and composition controllable synthesis of cobalt manganese spinel nanoparticles towards efficient oxygen electrocatalysis

被引:533
作者
Li, Chun [1 ,2 ]
Han, Xiaopeng [1 ,2 ]
Cheng, Fangyi [1 ,2 ,3 ]
Hu, Yuxiang [1 ,2 ]
Chen, Chengcheng [1 ,2 ]
Chen, Jun [1 ,2 ,3 ]
机构
[1] Nankai Univ, Minist Educ, Key Lab Adv Energy Mat Chem, Tianjin 300071, Peoples R China
[2] Nankai Univ, State Key Lab Elementoorgan Chem, Tianjin 300071, Peoples R China
[3] Nankai Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300071, Peoples R China
来源
NATURE COMMUNICATIONS | 2015年 / 6卷
关键词
OXIDE NANOPARTICLES; TRANSITION-METALS; REDUCTION; PLATINUM; EVOLUTION; OXIDATION; CATALYSTS; GRAPHENE; DESIGN;
D O I
10.1038/ncomms8345
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Spinel-type oxides are technologically important in many fields, including electronics, magnetism, catalysis and electrochemical energy storage and conversion. Typically, these materials are prepared by conventional ceramic routes that are energy consuming and offer limited control over shape and size. Moreover, for mixed-metal oxide spinels (for example, CoxMn3-xO4), the crystallographic phase sensitively correlates with the metal ratio, posing great challenges to synthesize active product with simultaneously tuned phase and composition. Here we report a general synthesis of ultrasmall cobalt manganese spinels with tailored structural symmetry and composition through facile solution-based oxidationprecipitation and insertion-crystallization process at modest condition. As an example application, the nanocrystalline spinels catalyse the oxygen reduction/evolution reactions, showing phase and composition co-dependent performance. Furthermore, the mild synthetic strategy allows the formation of homogeneous and strongly coupled spinel/carbon nanocomposites, which exhibit comparable activity but superior durability to Pt/C and serve as efficient catalysts to build rechargeable Zn-air and Li-air batteries.
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页数:8
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