Noble gas hydride, fuel, and method for producing noble gas hydride

A method for producing a noble gas hydride, comprising:

• (a) bringing a surface of a metal or a metal oxide into contact with a noble gas to perform at least one of adsorption of noble gas atoms to the surface or occlusion of noble gas atoms into an interior of the metal or the metal oxide, and
• (b) bringing the noble gas atoms present at at least one of the surface or the interior into contact with hydrogen atoms under a temperature condition of from 50 K to 298 K;
• (c) bringing a metal or a metal oxide into contact with a hydrogen-containing gas under a temperature condition of from 50 K to 298 K to allow hydrogen atoms to be present at at least one of a surface or an interior of the metal or the metal oxide, and
• (d) bringing the hydrogen atoms present at the metal or the metal oxide into contact with a noble gas;
• or
• (e) supplying both a hydrogen-containing gas and a noble gas to a surface of a metal or a metal oxide;
• and
• (f) bringing hydrogen atoms and noble gas atoms into contact on the surface of the metal or the metal oxide under a temperature condition of from 50 K to 298 K.