Amine-Assisted Synthesis of Concave Polyhedral Platinum Nanocrystals Having {411} High-Index Facets

被引：478

作者：

Huang, Xiaoqing

Zhao, Zipeng

Fan, Jingmin

Tan, Yueming

Zheng, Nanfeng ^{[1
]}

机构：

[1] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 13期

关键词：

SHAPE-CONTROLLED SYNTHESIS; METAL NANOCRYSTALS; GOLD NANOCRYSTALS; ONE-POT; NANOPARTICLES; CATALYSTS; ELECTROOXIDATION; NANOSTRUCTURES; HYDROGENATION; CHEMISTRY;

D O I：

10.1021/ja1117528

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

High-index surfaces of a face-centered cubic metal (e.g., Pd, Pt) have a high density of low-coordinated surface atoms and therefore possess enhanced catalysis activity in comparison with low-index faces. However, because of their high surface energy, the challenge of chemically preparing metal nanocrystals having high-index facets remains. We demonstrate in this work that introducing amines as the surface controller allows concave Pt nanocrystals having {411} high-index facets to be prepared through a facile wet-chemical route. The as-prepared Pt nanocrystals display a unique octapod morphology with {411} facets. The presence of high-index {411} exposed facets endows the concave Pt nanocrystals with excellent electrocatalytic activity in the oxidation of both formic acid and ethanol.

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收藏

页码：4718 / 4721

页数：4

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