Synthesis and Electrocatalytic Activity of Photoreduced Platinum Nanoparticles in a Poly(ethylenimine) Matrix

被引：52

作者：

Bai, Litao ^{[1
]}

Zhu, Huizhen ^{[1
]}

Thrasher, Joseph S. ^{[1
]}

Street, Shane C. ^{[1
]}

机构：

[1] Univ Alabama, Dept Chem, Tuscaloosa, AL 35487 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2009年 / 1卷 / 10期

基金：

美国国家科学基金会;

关键词：

Pt nanoparticles; photoreduction; formation mechanism; poly(ethylenimine); electrocatalytic activity; methanol oxidation; OXYGEN REDUCTION REACTION; WALL CARBON NANOTUBES; PARTICLE-SIZE; FUEL-CELLS; FORMATION MECHANISM; METHANOL OXIDATION; ELECTRODES; CATALYSTS; DENDRIMER; KINETICS;

D O I：

10.1021/am900471f

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Monodisperse polymer-mediated platinum (Pt) nanoparticles (NPs) have been synthesized by photoreduction in the presence of poly(ethylenimine) (PEI), a hyperbranched polymer The formation process of the Pt NPs is pursued by UV-vis spectroscopy. and the formation mechanism is discussed The morphology and size of the Pt NIPS were characterized by transmission electron microscopy (TEM) TEM imaging shows that the Pt NPs' average diameter is 2 88 +/- 30 53 nm The PEI/Pt NPs were immobilized on glassy carbon electrodes, and the electrocatalytic activity of the catalysts was investigated by cyclic voltammetry PEI/Pt NPs exhibit very high catalytic activity for a methanol oxidation reaction. PEI/Pt NPs oil glassy carbon electrodes are robust, showing good tolerance to poisoning even after many cycles. The electrocatalytic activity of PEI/Pt NPs compares favorably with other polymer-mediated Pt NPs The results indicate that PEI is an appropriate complexing reducing agent for the photochemical production of Pt NPs and a good capping agent. allowing immobilization of the NIPS on the working electrode

引用

页码：2304 / 2311

页数：8

共 57 条

[1] Recent advances in fuel cell technology and its applications [J].