Calorimetric Measurements of Excess Power Output During the Cathodic Charging of Deuterium into Palladium

A Seebeck-effect calorimeter was used to establish that generation of energy, in excess of the electrical energy input, can occur during the electrolysis of D₂O. The magnitude of the excess power is measured with respect to the electrolysis of H₂O as the baseline. The excess power levels of >60 W/cm³ palladium and excess energies of 74 kJ cannot be understood in terms of recombination of D₂ and O₂ within the calorimeter, other chemical reactions, or a storage-and-relaxation mechanism.