Oxygen chemisorption bond, nature

The chemical nature of the sites of alumina for water adsorption is not clearly understood. Chemisorption of water through dissociation into H and 0H ions which attach to the alumina surface, hydrogen bonding of water with surface oxygen and hydroxyl groups, van der Waals and pole-pole interactions between the water molecule and the alumina surface as well as condensation of water vapour in the mesopores of alumina are possible mechanisms [5]. 

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