In situ synthesis of Pt nanoparticles in hyperbranched thin film for electrocatalytic reduction of dioxygen

被引：9

作者：

Liu, YQ

Yang, ML

Zheng, ZK

Zhang, BL ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanal Chem, Changchun 130022, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Changchun 130022, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2005年 / 51卷 / 04期

基金：

中国国家自然科学基金;

关键词：

hyperbranched thin film; in situ synthesis; Pt nanoparticles; electrocatalytic reduction; dioxygen;

D O I：

10.1016/j.electacta.2005.05.020

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Hyperbranched thin film (HTF) with amino and imino groups, which can accommodate PtCl62-, was synthesized with small organic molecules on gold substrate based on SN2 displacement reaction. Platinum nanoparticles (Pt-NPs) were in situ synthesized by electrochemically reduction of precursors, PtCl62-, within HTF. The prepared films were characterized by X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS) and atomic force microscopy (AFM). It was confirmed that densely packed Pt-NPs were prepared with a narrow size distribution. EIS indicated that HTF inhibits electron transfer slightly while Pt nanoparticles in the HTF enhanced the electron-transfer ability greatly. Cyclic voltammetry (CV) indicated that HTF containing Pt-NPs exhibited a remarkable electrocatalytic activity for the electrochemical reduction of dioxygen. The quantity of Pt-NPs could be expediently controlled by the thickness of HTF. So the catalytic ability can be tailored correspondingly. (C) 2005 Elsevier Ltd. All rights reserved.

引用

页码：605 / 610

页数：6

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