Giant enhancement of hydrogen transport in rutile TiO2 at low temperatures

E. J. Spahr, L. Wen, M. Stavola, L. A. Boatner, L. C. Feldman, N. H. Tolk, G. Lüpke

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


Measurements of the O-H and O-D vibrational lifetimes show that the room-temperature hydrogen diffusion rate in rutile TiO2 can be enhanced by 9 orders of magnitude when stimulated by resonant infrared light. We find that the local oscillatory motion of the proton quickly couples to a wag-mode-assisted classical transfer process along the c channel with a jump rate of greater than 1 THz and a barrier height of 0.2 eV. This increase in proton transport rate at moderate temperatures provides new insight into hydrogen transport in solids, which could play a role in applications ranging from fuel cells to hydrogen production.

Original languageEnglish
Article number205901
JournalPhysical review letters
Issue number20
Publication statusPublished - May 21 2010

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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