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adsorption Interaction energy, hydrogen bonds Interaction potential energy, hydrogen Interaction potential energy, hydrogen molecule International Association for Hydrogen Energy International Energy Agency Hydrogen International Journal of Hydrogen Energy Ionization energy of hydrogen Ionization energy of the hydrogen atom Iridium hydrogenation activation energy Kinetics hydrogen activation energy Linear free energy relationship hydrogen exchange Lithium-hydrogen energy cycle Mean excitation energy hydrogen bond Metal-hydrogen binding energy Molecular hydrogen potential energy surfaces Nitrogen-hydrogen bonds dissociation energies Nuclear energy hydrogen production from Orbital energies in a hydrogen-like species Osmium hydrogenation activation energy Other potential applications of zeolites in a hydrogen energy system Palladium hydrogenation activation energy Potential energy addition of hydrogen bromide Potential energy and heat of hydrogenation Potential energy curve hydrogen 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