Chemisorption is a type of adsorption where a molecule forms a strong chemical bond with a solid surface. This process typically involves the transfer of electrons between the adsorbate and the surface, resulting in a more stable interaction. Chemisorption usually occurs at higher temperatures and can be irreversible, meaning the adsorbed molecules do not easily detach from the surface. In contrast to physisorption, which involves weaker van der Waals forces, chemisorption leads to significant changes in the electronic structure of both the adsorbate and the surface. This makes chemisorption important in various applications, including catalysis and surface chemistry, where the reactivity of materials is enhanced.