Deposition of platinum from Pt(PF3)4 on atomically clean platinum surfaces

✍ Scribed by Rong Zhang; Paul B. Comita

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 506 KB
• Volume: 200
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(92)80014-3

✦ Synopsis

The surface reactions of Pt( PFs), on Pt ( 111) and polycrystalline platinum have been examined under ultra-high vacuum conditions using Auger electron spectroscopy, temperature programmed desorption and secondary ion mass spcctrometry techniques. For both surfaces, the dissociation of Pt(PF& on platinum takes place below 500 K and gives rise to an intermediate state in which PF, is chemisorbed on the platinum surface. On Pt( 111) single crystal surface, a condensed state of Pt(PF,), is observed at 170 K for high coverage dosing. On a polycrystalline Pt surface, a desorption state of the reactant occurs at very high temperature, presumably from a recombination reaction of chemisorbed surface fragments.