N2 and H2 adsorption behavior of KOH-activated ordered mesoporous carbon

► CMK-3 was synthesized by replication from SBA-15. ► Activated CMK-3 provided a high specific surface area and higher hydrogen adsorption. ► The hydrogen adsorption of activated CMK-3 increased to 2.26 wt.%. ► Hydrogen physically adsorb on the OMC materials.