Direct coupling of H2 production through a high pressure PEM electrolyzer and its storage by physisorption on microporous materials

► Experimental on high pressure electrolysis + H2 physisorption on 5 adsorbents. ► Hydrogen adsorption isotherms resulted to be completely reversible. ► Zeolite 13X exhibited the highest volumetric capacity, corresponding to 14.34 g/L. ► Final comparison of the process energy balance.