Abstract
Previously published results of hydrogen adsorption on specially prepared, reduced-oxide nickel and copper samples indicated unusually large amounts sorbed (1). By means of a series of adsorption and H 2-D 2 exchange studies on a variety of reduced oxide and heat sintered samples, these results have been shown to arise through fine pore and/or defect structure in all cases, coupled with the effects of trace impurities in the case of the copper samples. The fine pore and/or defect structure is shown to be enhanced by a special low-temperature reduction technique and is either destroyed by high-temperature heat treatment or avoided by reducing at a much higher initial temperature.
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