Synthesis of core-shell PtCo nanocrystals

被引：95

作者：

Sobal, NS

Ebels, U

Möhwald, H

Giersig, M

机构：

[1] Hahn Meitner Inst Berlin GmbH, Bereich Solarenergieforsch, D-14109 Berlin, Germany

[2] Max Planck Inst Colloids & Interfaces, D-14476 Golm, Germany

[3] CEA Grenoble, UMR SPINTEC, Grenoble, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2003年 / 107卷 / 30期

关键词：

D O I：

10.1021/jp034200j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Monodisperse, bimetallic PtCo nanoparticles with a controllable core-shell structure have been synthesized by a new two-stage route. The process involves thermal decomposition of cobalt carbonyl in the presence of a nanosized platinum (Pt) dispersion, where the thickness of the Co shell can be controlled by changing the amount of cobalt carbonyl. The synthesized particles reveal a narrow size distribution with average diameters of 2.6 for Pt and a maximum of 7.6 nm for PtCo. Transmission electron microscopy (TEM), energy-dispersive X-ray spectrometry (EDX), optical spectroscopy, and superconducting quantum interference (SQUID) magnetometry were used for characterization of the bimetallic system.

引用

页码：7351 / 7354

页数：4

共 60 条

[1] Polyoxoanion- and tetrabutylammonium-stabilized, near-monodisperse, 40±6 Å Rh(0)∼1500 to Rh(0)∼3700 nanoclusters:: Synthesis, characterization, and hydrogenation catalysis [J].