Issue 3, 2019

Platinum single-atom adsorption on graphene: a density functional theory study

Abstract

Single-atom catalysis, which utilizes single atoms as active sites, is one of the most promising ways to enhance the catalytic activity and to reduce the amount of precious metals used. Platinum atoms deposited on graphene are reported to show enhanced catalytic activity for some chemical reactions, e.g. methanol oxidation in direct methanol fuel cells. However, the precise atomic structure, the key to understand the origin of the improved catalytic activity, is yet to be clarified. Here, we present a computational study to investigate the structure of platinum adsorbed on graphene with special emphasis on the edges of graphene nanoribbons. By means of density functional theory based thermodynamics, we find that single platinum atoms preferentially adsorb on the substitutional carbon sites at the hydrogen terminated graphene edge. The structures are further corroborated by the core level shift calculations. Large positive core level shifts indicate the strong interaction between single Pt atoms and graphene. The atomistic insight obtained in this study will be a basis for further investigation of the activity of single-atom catalysts based on platinum and graphene related materials.

Graphical abstract: Platinum single-atom adsorption on graphene: a density functional theory study

Supplementary files

Article information

Article type
Paper
Submitted
23 Sept. 2018
Accepted
08 Dec. 2018
First published
08 Janv. 2019
This article is Open Access
Creative Commons BY license

Nanoscale Adv., 2019,1, 1165-1174

Platinum single-atom adsorption on graphene: a density functional theory study

S. A. Wella, Y. Hamamoto, Suprijadi, Y. Morikawa and I. Hamada, Nanoscale Adv., 2019, 1, 1165 DOI: 10.1039/C8NA00236C

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