Galvanic Replacement Reactions in Metal Oxide Nanocrystals

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Galvanic replacement reactions provide a simple and versatile route for producing hollow nanostructures with controllable pore structures and compositions. However, these reactions have previously been limited to the chemical transformation of metallic nanostructures. We demonstrated galvanic replacement reactions in metal oxide nanocrystats as well. When manganese oxide (Mn3O4) nanocrystals were reacted with iron(II) perchlorate, hollow box-shaped nanocrystats of Mn3O4/gamma-Fe2O3 ("nanoboxes") were produced. These nanoboxes ultimately transformed into hollow cagetike nanocrystats of gamma-Fe2O3 ("nanocages"). Because of their nonequihbrium compositions and hollow structures, these nanoboxes and nanocages exhibited good performance as anode materials for lithium ion batteries. The generality of this approach was demonstrated with other metal pairs, including Co3O4/SnO2 and Mn3O4/SnO2.
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Issue Date
2013-05
Language
English
Article Type
Article
Citation

SCIENCE, v.340, no.6135, pp.964 - 968

ISSN
0036-8075
DOI
10.1126/science.1234751
URI
http://hdl.handle.net/10203/306499
Appears in Collection
MS-Journal Papers(저널논문)
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