Adsorption is the process by which atoms, ions, or molecules from a gas, liquid, or dissolved solid adhere to a surface. This surface is typically that of a solid catalyst. Adsorption is critical in catalysis because it concentrates the reactants on the catalyst surface, enhancing their reactivity. There are two main types of adsorption: physisorption and chemisorption. Physisorption involves weak Van der Waals forces, while chemisorption involves the formation of stronger chemical bonds.
