Electrochemical synthesis of metal superhydrides

A metal electrode device comprising:

• metal atoms forming a lattice;
• and
• a plurality of hydrogen atoms bonded to each of the metal atoms, wherein the plurality of hydrogen atoms are loaded into the lattice from an electrolyte configured to kinetically suppress a hydrogen evolution reaction in the lattice,
• wherein lattice is maintained at a pressure less than 100 gigapascal (GPa).

A method comprising:

• obtaining a metal electrode comprising one or more metal atoms;
• obtaining an electrolyte comprising hydrogen atoms, the electrolyte configured to kinetically suppress a hydrogen evolution reaction in the electrode;
• disposing the electrode in the electrolyte;
• applying pressure to the electrode and the electrolyte while the electrode is disposed in the electrolyte;
• and
• forming, based on applying the pressure, a superhydride comprising a plurality of hydrogen atoms of the electrolyte being bonded to each of the one or more metal atoms of the metal electrode, the metal superhydride being stable at a pressure less than 100 Gigapascal (GPa).