Silver nanorods for oxygen reduction: Strong effects of protecting ligand on the electrocatalytic activity

被引：96

作者：

Lu, Yizhong ^{[1
,2
]}

Wang, Yichen ^{[1
,2
]}

Chen, Wei ^{[1
]}

机构：

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

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 06期

关键词：

Electrocatalysis; Nanorod; Oxygen reduction; Rotating disk electrode; Silver; Voltammetry; GOLD NANOPARTICLES; POTENTIAL RANGE; ALKALINE MEDIA; AG/AG2O COUPLE; CATALYSTS; ELECTROREDUCTION; HYDROGEN; NANOWIRES; SIZE; HYDROXIDE;

D O I：

10.1016/j.jpowsour.2010.11.119

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：

Uniform and ultralong silver nanorods are synthesized with a wet chemical reduction method by using PVP as a stabilizer. The crystal structure and morphology of the synthesized nanorods are characterized with transmission electron microscopy (TEM), powder X-ray diffraction (XRD) and UV-vis absorption spectroscopy. The electrocatalytic activity of the Ag nanorods with and without PVP stabilizer, towards oxygen reduction reaction (ORR), is studied and compared by cyclic voltammetry (CV) and rotating disk electrode (ROE) measurements in alkaline solution. Compared to the low current density and incomplete two-electron reaction process of ORR with PVP-protected Ag nanorods, the catalytic activity of the Ag nanorods with removal of the PVP is found to be enhanced remarkably with much higher oxygen reduction current density and the most efficient four-electron process. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：3033 / 3038

页数：6

共 36 条

[1] Highly ordered rectangular silver nanowire monolayers: water-assisted synthesis and galvanic replacement reaction with HAuCl4 [J].