Issue 21, 2014

Selective patterning of Prussian blue on N-[3-(trimethoxysilyl)propyl]ethylenediamine capped gold nanoparticle film for electrocatalysis of hydrogen peroxide reduction

Abstract

In this work, we have demonstrated selective patterning of electrodes coated with N-[3-(trimethoxysilyl)propyl]ethylenediamine (EDAS) stabilised gold nanoparticles (Sil-AuNps) films with Prussian blue (PB) by continuous electrochemical cycling of Sil-AuNps film modified Indium Tin Oxide (ITO) electrode in K3[Fe(CN6)] solution. The PB formed on gold nanoparticles (PB@Sil-AuNps) exhibits an electrochemical response similar to the PB formed on a bare ITO surface. However, the high spin iron redox state in PB formed on Sil-AuNps shows almost zero peak to peak separation (ΔEp) value in contrast to the finite ΔEp for PB formed on bare ITO. In addition, this selectively patterned PB on Sil-AuNps modified ITO electrode shows characteristic voltammetric responses of both PB and gold in 0.1 M KNO3 and 0.5 M H2SO4 respectively. In order to see the coverage of PB over gold nanoparticles, ITO electrode surface was characterised using scanning electron microscopy (SEM) and energy dispersive X-rays analysis (EDX) techniques. Selective patterning of redox mediator on noble metal nanoparticles results in lower film resistivity, which favours high electrocatalytic activity towards hydrogen peroxide electro-reduction. The sensitivity of this modified electrode towards H2O2 is 3.4 nA nM−1.

Graphical abstract: Selective patterning of Prussian blue on N-[3-(trimethoxysilyl)propyl]ethylenediamine capped gold nanoparticle film for electrocatalysis of hydrogen peroxide reduction

Article information

Article type
Paper
Submitted
17 Oct 2013
Accepted
07 Feb 2014
First published
10 Feb 2014

RSC Adv., 2014,4, 10975-10981

Selective patterning of Prussian blue on N-[3-(trimethoxysilyl)propyl]ethylenediamine capped gold nanoparticle film for electrocatalysis of hydrogen peroxide reduction

A. V. Narendra Kumar and J. Joseph, RSC Adv., 2014, 4, 10975 DOI: 10.1039/C3RA45907A

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