Interaction of Helium, Neon, Argon, and Krypton with a Clean Platinum Surface

Abstract

The heats of adsorption of helium, neon, argon, and krypton have been studied on a clean platinum black of high area, prepared using the technique of a thermally indicated titration. These measured heats are compared with the theoretically calculated attractive part of interaction energy between a nonpolar gas and a metal surface. The Margenau and Pollard formulas best represents the measured values. Considering the uncertainty involved due to lateral interaction and the neglected repulsive part of the potential function it is reasonable to say that all of the theories are inagreement with the measured values to the degree of their approximation.