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Chemisorption and Catalysis on Supported Metals

Chemisorption, the chemical bonding between gas-phase molecules and surface atoms, is the first and most important step in a catalytic reaction On supported metal catalysts, chemisorption takes place on small metal crystallites, which are typically anchored to a high surface area oxide material. These chemisorbed molecules then react with other adsorbed species or with gas-phase molecules to produce reaction products. Why is chemisorption so important? The rate of the catalytic reaction as well as its selectivity to desired products is directly related to the chemisorption properties of the supported metal catalyst. 

Surface Area Measurement from Temperature-Programmed Desorption Data

 Temperature-programmed desorption experiments offer a means of obtaining quantitative information about the metallic surface area of supported metal catalysts along with a qualitative measure of the variation in strength of adsorption for different sites on the surface.   

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