Hydrogen permeation properties of Pd-coated Pd₃₃Ni₅₂Si₁₅ amorphous alloy membrane

Abstract

The vast majority of experimental techniques used for the measurements of hydrogen permeability through metallic membranes whose one or both surfaces are covered with a thin Pd film is based on the assumption that a ratio of film-to-membrane thickness is small enough to cause hydrogen flow to be independent of the Pd film thickness. In an attempt to verify this assumption, we have measured the hydrogen flow through the Pd 33 Ni 52 Si 15 amorphous membrane covered with Pd film of 10, 20, and 30 nm in thickness. Contrary to our expectations, we have found a dramatic decrease in hydrogen flow with the increase in Pd film thickness. Our findings are discussed in terms of potential barrier between the two different phases.

Enhancement of Interfacial Hydrogen Interactions with Nanoporous Gold-Containing Metallic Glass

“…New-generation Pd-based nanomaterials are promising candidates to enhance the efficiency of hydrogen interactions, thus providing green alternatives for nanoscale energy applications. Among these, Pd-metallic glasses (MGs) have recently garnered significant recognition in a variety of energy applications, including hydrogen storage and release, − hydrogen evolution reaction (HER), − hydrogen oxidation reaction in fuel cells, methanol/ethanol electrooxidation, − glucose sensors, MEMS hydrogen sensor, − and hydrogen permeation membranes. − The grain-free structure of metallic glasses, along with the presence of free volume between atomic clusters, are advantages of Pd-MGs over polycrystalline Pd (alloys) in terms of hydrogen storage and release as well as electrochemical stability in long-term use. ,,,, …”