Abstract
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 language | English |
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Article number | 205901 |
Journal | Physical review letters |
Volume | 104 |
Issue number | 20 |
DOIs | |
Publication status | Published - May 21 2010 |
ASJC Scopus subject areas
- Physics and Astronomy(all)