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 |
|---|---|
| Article number | 205901 |
| Journal | Physical Review Letters |
| Volume | 104 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - May 21 2010 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Giant enhancement of hydrogen transport in rutile TiO2 at low temperatures. / Spahr, E. J.; Wen, L.; Stavola, M.; Boatner, L. A.; Feldman, Leonard C; Tolk, N. H.; Lüpke, G.
In: Physical Review Letters, Vol. 104, No. 20, 205901, 21.05.2010.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Giant enhancement of hydrogen transport in rutile TiO2 at low temperatures
AU - Spahr, E. J.
AU - Wen, L.
AU - Stavola, M.
AU - Boatner, L. A.
AU - Feldman, Leonard C
AU - Tolk, N. H.
AU - Lüpke, G.
PY - 2010/5/21
Y1 - 2010/5/21
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=77953113876&partnerID=8YFLogxK
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U2 - 10.1103/PhysRevLett.104.205901
DO - 10.1103/PhysRevLett.104.205901
M3 - Article
VL - 104
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 20
M1 - 205901
ER -