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Tunable Low Density Palladium Nanowire Foams

  • Author(s): Gilbert, DA
  • Burks, EC
  • Ushakov, SV
  • Abellan, P
  • Arslan, I
  • Felter, TE
  • Navrotsky, A
  • Liu, K
  • et al.
Abstract

© 2017 American Chemical Society. Nanostructured palladium foams offer exciting potential for applications in diverse fields such as catalysts, fuel cells, and particularly hydrogen storage technologies. We have fabricated palladium nanowire foams using a cross-linking and freeze-drying technique. These foams have a tunable density down to 0.1% of the bulk, and a surface area-to-volume ratio of up to 1.54 × 106:1 m-1. They exhibit highly attractive characteristics for hydrogen storage, in terms of loading capacity, rate of absorption, and heat of absorption. The hydrogen absorption/desorption process is hysteretic in nature, accompanied by substantial lattice expansion/contraction as the foam converts between Pd and PdHx.

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