Diffusion of Hydrogen Through Platinum and Nickel and Through Double Layers of These Metals

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Abstract
Flow of hydrogen through single sheets of Ni and Pt with atmospheric pressure on ingoing side and pressure of 0.1/mm on outgoing side follows the empirical equationR=A·((p012−pt12)/x)·T−12·ε−b1/Tsimilar to that given by Borelius, where pt is small compared with p0 but apparently proportional to p0; with double layers of these two metals the b1 of the exponential is dependent only on the metal at the outgoing surface, and is the difference between the work of escape from the outgoing surface and the heat of solution of hydrogen in that metal. The kinetic theory flow equation is sufficient to explain the pt, and the variation of pt with temperature may be used to compute the work function at the outgoing surface, and also to obtain values of m/k where m is the mass of the hydrogen atom and k the Boltzmann constant.

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