TY - JOUR
T1 - Surface diffusion of hydrogen on Pt(111)
T2 - laser-induced thermal desorption studies
AU - Seebauer, E. G.
AU - Schmidt, L. D.
N1 - Funding Information:
* This research was partially supported by NSF under Grant No. DMR82126729.
PY - 1986/1/3
Y1 - 1986/1/3
N2 - Surface diffusion of deuterium and hydrogen on Pt(111) has been investigated by laser-induced thermal desorption. As the initial surface coverage of deuterium is varied from 0.001 to 0.33, the diffusional activation energy falls from 12 to 7 kcal mol, and the pre-exponential factor falls from 3 × 104 to 0.5 cm2/s. Concentration profiles measured directly by a variable aperture technique confirm that at 234 K deuterium diffusion slows at low coverage. Hydrogen diffuses about twice as fast as deuterium.
AB - Surface diffusion of deuterium and hydrogen on Pt(111) has been investigated by laser-induced thermal desorption. As the initial surface coverage of deuterium is varied from 0.001 to 0.33, the diffusional activation energy falls from 12 to 7 kcal mol, and the pre-exponential factor falls from 3 × 104 to 0.5 cm2/s. Concentration profiles measured directly by a variable aperture technique confirm that at 234 K deuterium diffusion slows at low coverage. Hydrogen diffuses about twice as fast as deuterium.
UR - http://www.scopus.com/inward/record.url?scp=0001485364&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0001485364&partnerID=8YFLogxK
U2 - 10.1016/0009-2614(86)87027-0
DO - 10.1016/0009-2614(86)87027-0
M3 - Article
AN - SCOPUS:0001485364
SN - 0009-2614
VL - 123
SP - 129
EP - 133
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 1-2
ER -