Abstract
Carbons are widely used as supports for precious metal catalysts. The carbon should be carefully chosen to have a high area and a minimum of micropores. A number of commercial carbons have been chosen and examined by nitrogen adsorption to determine their surface properties. Some of the carbons have been subjected to carbon burnoff, acid soaking, and/or deposition of carbon via a polymer. Changes in surface properties are brought about by burnoff, but the carbons retain a large proportion of microporosity, although mesopore volume is increased. Acid washing does not have a significant effect on area or pore volume. Deposition of carbon results in pore volume decrease including volume of micropores.
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