Hydrogen diffusion in metallic and nanostructured materials

G. Majer, U. Eberle, F. Kimmerle, E. Stanik, S. Orimo

Research output: Contribution to journalConference articlepeer-review

28 Citations (Scopus)

Abstract

The diffusion mechanisms of hydrogen in metallic and nanostructured materials have been studied systematically by different nuclear magnetic resonance techniques. The present paper reviews three examples of our recent work: (i) The hydrogen-stabilized Laves-phase compound C15-HfTi2H4, with rather complex mechanisms of hydrogen diffusion. Long-range diffusion and localized motion coexist on different time scales in this compound. (ii) Nanostructured vanadium-hydrides n-VHx, in which the dynamical properties of hydrogen are fundamentally changed compared to that in a crystalline compound. The diffusion parameters of hydrogen in the grain boundary regions could be determined independently of the hydrogen motion inside the crystalline grains. (iii) Hydrogen in nanostructured hydrogen-graphite-systems n-CHx, where the NMR spectra reveal two types of hydrogen coordinations. The relaxation data indicate high hydrogen mobilities at ambient temperatures.

Original languageEnglish
Pages (from-to)81-89
Number of pages9
JournalPhysica B: Condensed Matter
Volume328
Issue number1-2
DOIs
Publication statusPublished - 2003 Apr 1
Externally publishedYes
EventT2PAM - Higashi-Hiroshima, Japan
Duration: 2002 Aug 162002 Aug 19

Keywords

  • Hydrogen diffusion
  • Hydrogen storage materials
  • Intermetallic compounds
  • Nanocrystalline materials
  • Nuclear magnetic resonance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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