The term 'accumulate gases on the surface' can be summarized by the word 'adsorb, ' which is a process in which molecules of gas, liquid, or dissolved solids are attracted and held on the surface of a solid or liquid. This process is often used to separate components of a mixture, as the adsorbed molecules are held more strongly than other molecules in the mixture. Adsorption is also used to purify gases and liquids, as well as to store them for later use.