Hydrogen pressure and electrical resistivity dependencies on hydrogen content in the Pd81Pt19 Hn system

Abstract

Combinations of knowledge of the hydrogen pressure-hydrogen content-temperature (p-c(n)-T) relationships of the Pd81Pt19 Hn system, and of the dependency of hydrogen content, n, in Pd81Pt19 on electrical resistivity, have continued to provide interesting research opportunities. For example such information has provided definite arguments concerning interpretations of hydrogen overpotentials measured during electrolytic hydrogen evolution at both catalytically active and inactive cathode surfaces. Latterly, this Pd81Pt19 Hn information has also proved invaluable in regard to elastic strain gradient lines of interpretation of `Uphill' hydrogen diffusion processes operative within hydrogen permeation membranes.