Adsorption and desorption of NO, CO and H2 on Pt(111): Laser-induced thermal desorption studies
โ Scribed by E.G. Seebauer; A.C.F. Kong; L.D. Schmidt
- Publisher
- Elsevier Science
- Year
- 1986
- Weight
- 96 KB
- Volume
- 176
- Category
- Article
- ISSN
- 0167-2584
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Surface diffusion of deuterium and hydrogen on Pt(ll1) 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 x lo
Thermal desorption of D, from oudized titanium surfaces, covered wnh various amounts of platurum, shows no detectable irreversible adsorpuon for up to three monolayers of Pt when the substrate tcmpersture is 130 K. Twelve monolayers of Pt gtve a substrate that adsorbs signdkant amounts of both CO 3n