Shape and Composition-Controlled Platinum Alloy Nanocrystals Using Carbon Monoxide as Reducing Agent

被引：427

作者：

Wu, Jianbo ^{[1
]}

Gross, Adam ^{[1
]}

Yang, Hong ^{[1
]}

机构：

[1] Univ Rochester, Dept Chem Engn, Rochester, NY 14627 USA

来源：

NANO LETTERS | 2011年 / 11卷 / 02期

基金：

美国国家科学基金会;

关键词：

Pt alloy; nanocrystal; carbon monoxide; cube; octahedron; oxygen reduction reaction; OXYGEN REDUCTION ACTIVITY; METAL NANOCRYSTALS; GENERAL STRATEGY; CO OXIDATION; NANOPARTICLES; MONODISPERSE; CHEMISTRY; NANOCUBES; ELECTROCHEMISTRY; HYDROGENATION;

D O I：

10.1021/nl104094p

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The shape of metal alloy nanocrystals plays an important role in catalytic performances. Many methods developed so far in controlling the morphologies of nanocrystals are however limited by the synthesis that is often material and shape specific. Here we show using a gas reducing agent in liquid solution (GRAILS) method, different Pt alloy (Pt-M, M = Co, Fe, Ni, Pd) nanocrystals with cubic and octahedral morphologies can be prepared under the same kind of reducing reaction condition. Abroad range of compositions can also be obtained for these Pt alloy nanocrystals. Thus, this GRAILS method is a general approach to the preparation of uniform shape and composition-controlled Pt alloy nanocrystals. The area-specific oxygen reduction reaction (ORR) activities of Pt3Ni catalysts at 0.9 V are 0.85 mA/cm(Pt)(2) for the nanocubes, and 1.26 mA/cm(Pt)(2) for the nano octahedra. The ORR mass activity of the octahedral Pt3Ni catalyst reaches 0.44 A/mg(Pt).

引用

页码：798 / 802

页数：5

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