Electrochemical preparation of nanostructured bimetallic clusters
Electrochemical preparation of nanostructured bimetallic clusters
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DOI：
10.1021/cm00060a004
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发表时间：
1995-12
影响因子：
8.6
通讯作者：
M. Reetz;W. Helbig;S. Quaiser
中科院分区：
文献类型：
--
作者：
M. Reetz;W. Helbig;S. Quaiser
Recently the authors reported an electrochemical method for the size-selective preparation of tetraalkylammonium salt-stabilized transition-metal clusters in the size range of 1-6 nm. In this procedure, a sacrificial anode such as a palladium or nickel sheet is electrochemically oxidized with the formation of the corresponding metal ions which are reduced back to the zero oxidation state thereby forming metal clusters which are stabilized by the ammonium salts (which also functions as the electrolyte). The advantages include high yield, easy isolation, and simple control of particle size by adjustment of the current density. A combined TEM/STM study showed that the clusters are surrounded by a monomolecular layer of tetraalkylammonium salt. Electrochemically prepared cobalt clusters of this type have been shown to be superparamagnetic. 8 refs., 3 figs., 1 tab.
