Metal Nanoparticles Used as Catalysts
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“Metal nanoparticles” receive much attention because of their uniform size and sharp size distribution in nanometers, and because they are easily prepared as a result of recent developments in nanoscience and nanotechnology. In addition, catalysts based on such metal nanoparticles are highly active and selective. They also exhibit a long lifetime for several kinds of chemical reactions. In this article, a background on the use of metal nanoparticles as catalyst is first briefly discussed. Then, preparation, characterization, structures, and catalyses of metal nanoparticles, especially of bimetallic nanoparticles, are described. The prospects on the use of metal nanoparticles as catalysts are summarized in the last section.