The Journal of Physical Chemistry B · 1997 · 10 citations · 30 references
Natural SciencesChemical EngineeringChemistryCatalysisReaction EngineeringSurface ScienceAdsorption ProcessesCatalyst CharacterizationCatalytic MaterialsCatalytic Reaction EngineeringCatalytic Reaction KineticsSurface AdsorptionActivation EnergyAdsorption MechanismsAdsorption PhenomenaAdsorption ReactionsHydrogen-deuterium ExchangeHydrogen-deuterium Exchange SpectroscopyRelaxation Time MeasurementsTransverse Relaxation Time
Hydrogen adsorption on a Cu/MgO catalyst is investigated using in situ 1 H NMR. The adsorption is largely homogeneous, demonstrating reasonable agreement with the Langmuir isotherm and only small variations in the frequency shift and spin−lattice relaxation time with increasing coverage. The catalyst is investigated under flowing gas conditions, and the hydrogen/deuterium exchange kinetics are studied. The activation energy for exchange is measured to be 96 kJ mol -1 . The 1 H variable-temperature NMR probe developed here and used for the in situ adsorption isotherm and the flowing gas experiments is also described.
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