Abstract
The potentials of the Pd/TiO2 and Pd/Al2O3 catalysts were measured during saturation with hydrogen and during oxidation of the absorbed hydrogen with Ce(IV) in the medium of 0.5M-H2SO4. From the potential values attained in the coexistence region of the α- and β-hydride phases the enthalpy of hydrogen absorption, ∆Hab in Pd deposited on various supports was evaluated. With standard supports Degussa, ∆Hab approaches the value measured on Pt black; a marked decrease of the absorption enthalpy was observed on the support TiO2 of domestic provenience.
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