Shape dependent electrocatalytic behaviour of silver nanoparticles

被引：143

作者：

Bansal, Vipul ^{[1
]}

Li, Vivian ^{[1
]}

O'Mullane, Anthony P. ^{[1
]}

Bhargava, Suresh K. ^{[1
]}

机构：

[1] RMIT Univ, Sch Appl Sci, Melbourne, Vic 3001, Australia

来源：

CRYSTENGCOMM | 2010年 / 12卷 / 12期

基金：

澳大利亚研究理事会;

关键词：

GLASSY-CARBON; PLATINUM NANOPARTICLES; POLYCRYSTALLINE SILVER; CATALYTIC-OXIDATION; OPTICAL-PROPERTIES; OXYGEN REDUCTION; AG NANOPARTICLES; RAPID SYNTHESIS; FORMIC-ACID; GOLD;

D O I：

10.1039/c0ce00215a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The electrochemical and electrocatalytic behaviour of silver nanoprisms, nanospheres and nanocubes of comparable size in an alkaline medium have been investigated to ascertain the shape dependent behaviour of silver nanoparticles, which are an extensively studied nanomaterial. The nanomaterials were synthesised using chemical methods and characterised with UV-visible spectroscopy, transmission electron microscopy and X-ray diffraction. The nanomaterials were immobilised on a substrate glassy carbon electrode and characterised by cyclic voltammetry for their surface oxide electrochemistry. The electrocatalytic oxidation of hydrazine and formaldehyde and the reduction of hydrogen peroxide were studied by performing cyclic voltammetric and chronoamperometric experiments for both the nanomaterials and a smooth polycrystalline macrosized silver electrode. In all cases the nanomaterials showed enhanced electrocatalytic activity over the macro-silver electrode. Significantly, the silver nanoprisms that are rich in hcp lamellar defects showed greater activity than nanospheres and nanocubes for all reactions studied.

引用

页码：4280 / 4286

页数：7

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