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)

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