Abstract
Wide line nuclear magnetic resonance (NMR) has been used to study the distribution of protons between the surface and bulk phases in a transition alumina. The width of the proton NMR line in a series of transition aluminas was shown to be a function of the surface area as measured by the nitrogen adsorption method (BET). The NMR method can be used to quantitatively estimate the concentration of total hydroxyl content in a transition alumina. The fraction of hydroxyl groups located on the surface of the sample can be estimated from the width of the proton NMR line. This fraction was shown to be related to the surface area of the sample. Proton line widths were combined with aluminum-27 amplitudes to estimate the concentration of protons in the first two molecular layers of a transition alumina.
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