| 摘要: | 摘要： AbstractSpinel-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 oxidation–precipitation 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.
其他題名： Nat Commun
出版者： London: Springer Science and Business Media LLC
出版日期： 2015-06-04
出處： Nature Communications, 2015-06, Vol.6 (1), p.7345--7345, Article 7345
資源來源： Publicly Available Content Database
版權： The Author(s) 2015
版權： Copyright Nature Publishing Group Jun 2015
版權： Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. 2015 Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved.
識別號： ISSN: 2041-1723
識別號： EISSN: 2041-1723
識別號： DOI: 10.1038/ncomms8345
識別號： PMID: 26040417 |
