Erratum: Hydrogen pumping with palladium membranes [J. Vac. Sci. Technol. A 3, 412 (1985)] Available to Purchase

The reaction rate constant for oxidation on the surface of palladium, Eq. (6), has a sign error in its activation energy, and has an error in its units. The equation and its subsequent sentence should read k(molecules cm²/atom² s)=4×10⁻⁸ exp (−7000/RT), (6) where R=1.987 cal/mol K. There are approximately 4×10¹⁴ available sites per cm² of palladium. It is interesting to note that, since the enthalpy of H ⋅ adsorption is greater than the activation enthalpy of H ⋅ reaction, the per‐area reaction rate should increase with decreasing temperature (at constant pressure) until a saturation maximum is reached.