Faster H recovery in Pd nanoparticle layer based Gd switchable mirrors: size-induced geometric and electronic effects

I. Aruna, B. R. Mehta, L. K. Malhotra

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Abstract

An investigation of the effect of the nanoparticle size in the Pd overlayer on the hydrogen-induced changes in the Gd switchable mirrors is reported in the present study. Deposition of a 10 nm thick Pd overlayer consisting of nanoparticles of 9 nm size results in a large increase in optical and electrical contrast and a substantial decrease in response and recovery time in Gd switchable mirrors. This study shows that a uniformly-deposited nanoparticle catalytic layer is important for improving H recovery. These results have been explained in terms of the size-induced increase in surface area, lattice contraction, and shift of Pd d-band centroid. The results of the present study, specifically the observation of decrease in recovery time has important implications for hydrogen sensor, storage, and switching applications.

Original languageEnglish
Article number103101
Number of pages3
JournalApplied Physics Letters
Volume87
Issue number10
DOIs
Publication statusPublished - 5 Sep 2005
Externally publishedYes

Keywords

  • nanoparticles
  • mirrors
  • catalysis
  • chemical interdiffusion

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