Nanoparticles in Catalysis
7 January 2008Catalysts are basically nanoparticles and these nanoparticles varying in sizes between 1 to 20 nm are composed of clusters of atoms. During the application, these nanoparticles restructure and thereby these improve the surface mobility. There are two types of nanocluster catalysts.
Enzymes are the natural catalysts. In most of the cases, these enzymes are composed of inorganic nanoclusters. High molecular weight proteins mostly surround these inorganic nanoclusters and these enzymes usually work in aqueous medium. These enzymes in human and plants are responsible for overall growth.
The next and most important type of catalyst is synthetic catalyst. Synthetic catalysts can also be of two types homogeneous and heterogeneous and these are often metal nanoclusters. heterogeneous systems generally operate at high temperature and sometimes upto 1000K. In heterogeneous system, the reactant and product flow in gas phase enabling to remove the product molecule from the catalyst bed.
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