Facets and surface relaxation of tetrahexahedral platinum nanocrystals

Journal Article · Mon Sep 17 00:00:00 EDT 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2785953· OSTI ID:21013619

Yong, Ding; Yifan, Gao; Zhonglin, Wang; Na, Tian; Zhiyou, Zhou; Shigang, Sun ^[1]

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1. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245 (United States)

Platinum tetrahexahedral (THH) nanocrystals have been prepared by an electrochemical treatment of Pt nanospheres supported on glassy carbon by square-wave potential [N. Tian et al., Science 316, 732 (2007)]. In this paper, the shape and facets of the THH nanocrystals have been characterized by transmission electron microscopy. Most of the exposed surfaces are close to {l_brace}730{r_brace} facets. Detailed relaxation of the surface atoms has been observed at surface steps. It is anticipated that the high density of atomic steps and kinks is likely related to the enhanced catalytic activity of the THH nanocrystals.

• OSTI ID: 21013619
• Journal Information: Applied Physics Letters, Vol. 91, Issue 12; Other Information: DOI: 10.1063/1.2785953; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON
CRYSTAL STRUCTURE
CRYSTALS
ELECTROCHEMISTRY
ELECTRON DIFFRACTION
NANOSTRUCTURES
PLATINUM
POTENTIALS
RELAXATION
TRANSMISSION ELECTRON MICROSCOPY