Title
Search for encapsulation of platinum, silver, and gold at the surface of graphite
Publication Date
7-31-2020
Department
Chemistry; Materials Science and Engineering; Ames Laboratory; Physics and Astronomy
Campus Units
Ames Laboratory, Chemistry, Materials Science and Engineering, Physics and Astronomy
OSTI ID+
1644234
Report Number
IS-J 10281; ISJ 10256
DOI
10.1103/PhysRevResearch.2.033175
Journal Title
Physical Review Research
Volume Number
2
Issue Number
3
First Page
033175
Abstract
Using scanning tunneling microscopy, we show that Pt clusters can be encapsulated beneath the surface of graphite, whereas Ag and Au cannot. This is in complete agreement with independent predictions from density functional theory, which show that surface intercalation of single metal atoms is favorable for Pt, but unfavorable for Ag and Au. This supports the validity of using single-metal-atom energetics for predicting encapsulation of metal nanoparticles at the graphite surface. We also demonstrate that the optimal temperature for encapsulation scales with the cohesive energy of the metal.
DOE Contract Number(s)
AC02-07CH11358; AC02-05CH11231; ACI-1548562
Language
en
Department of Energy Subject Categories
36 MATERIALS SCIENCE
Publisher
Iowa State University Digital Repository, Ames IA (United States)
