Abstract
Studies have been made of the measurement of metal surface areas of platinum catalysts supported on molecular sieve, using a gas chromatographic pulse technique and thermodesorption. It has been found possible to identify conditions where carbon monoxide chemisorbs on platinum and not on the support. The values of metal surface areas measured under these conditions agree well with metal surface areas determined by chemisorption of hydrogen and of oxygen and by direct electron microscopic examination. The results indicate that 0.55 molecules of carbon monoxide are adsorbed per platinum surface atom, a value that suggests the gas is mainly bridge-bonded under the conditions of measurement.
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