Abstract
An attempt has been made to find a model system in which to study irradiation effects on heterogenous catalysts. Pre-irradiation with gamma rays from cobalt-60 enhanced the rate of hydrogen conversion over magnesium oxide catalysts, especially when the oxide was pretreated with oxygen at elevated temperature. No correlation could be found between the catalytic activity and the formation of paramagnetic centers observed in the electron spin resonance spectra at room temperature. Irradiation produced no detectable change in the adsorption properties of magnesium oxide for hydrogen and carbon monoxide. While the results do not permit the establishment of a positive reaction mechanism they do permit the elimination of several of the possible alternatives.
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