Resistivity testing of palladium dilution limits in CoPd alloys for hydrogen storage

Sudhansu Sekhar Das, Gregory Kopnov, Alexander Gerber

Research output: Contribution to journalArticlepeer-review

Abstract

Palladium satisfies most of the requirements for an effective hydrogen storage material with two major drawbacks: it has a relatively low gravimetric hydrogen density and is prohibitively expensive for large scale applications. Pd-based alloys should be considered as possible alternatives to a pure Pd. The question is how much one can dilute the Pd concentration in a variety of candidate materials while preserving the hydrogen absorption capability. We demonstrate that the resistivity measurements of thin film alloy samples can be used for a qualitative high-throughput screening and study of the hydrogen absorbing properties over the entire range of palladium concentrations. Con-trary to palladium-rich alloys where additional hydrogen scattering indicates a degree of hydrogen content, the diluted alloy films respond by a decrease in resistance due to their thickness expansion. Evidence of significant hydrogen absorption was found in thin CoPd films diluted to just 20% of Pd.

Original languageEnglish
Article number111
JournalMaterials
Volume15
Issue number1
DOIs
StatePublished - 1 Jan 2022

Keywords

  • Hydrogen storage
  • Palladium alloys
  • Thin films

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • General Materials Science

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