Facets and surface relaxation of tetrahexahedral platinum nanocrystals

被引：30

作者：

Ding, Yong

Gao, Yifan

Wanga, Zhong Lin ^{[1
]}

Tian, Na

Zhou, Zhi-You

Sun, Shi-Gang

机构：

[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[2] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 12期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

D O I：

10.1063/1.2785953

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Platinum tetrahexahedral (THH) nanocrystals have been prepared by an electrochemical treatment of Pt nanospheres supported on glassy carbon by square-wave potential [N. Tian , 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 {730} 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.

引用

页数：3

共 15 条

[1] STABILITY AND STRUCTURE OF HIGH MILLER INDEX PLATINUM CRYSTAL-SURFACES IN VACUUM AND IN PRESENCE OF ADSORBED CARBON AND OXYGEN [J].