Chemisorption is a specific type of adsorption characterised by a strong interaction between the adsorbate (this could be any gas that adsorbs on to the surface of the material) and the surface of the material (adsorbent).
In physisorption weak Van der Waals forces attract the adsorbate to the adsorbent while in chemisorption these bonds are ionic or covalent, depending on the nature of the material.
Characteristics of chemisorption include:
Chemisorption is widely used in catalysts characterisation for investigating:
Related technologies such as Temperature programmed Reduction (TPR), temperature programmed desorption (TPD) and temperature programmed oxidation (TPO) can be used to gain further information about both chemisorption and physisorption processes.
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