Journal of Chemical Sciences

, 121:735

Core-shell Au/Ag nanoparticles embedded in silicate sol-gel network for sensor application towards hydrogen peroxide


DOI: 10.1007/s12039-009-0088-6

Cite this article as:
Manivannan, S. & Ramaraj, R. J Chem Sci (2009) 121: 735. doi:10.1007/s12039-009-0088-6


The electrocatalytic activity of core-shell Au100−xAgx (x = 15, 27, 46, and 60) bimetallic nanoparticles embedded in methyl functionalized silicate MTMOS network towards the reduction of hydrogen peroxide was investigated by using cyclic voltammetry and chronoamperometric techniques. Core-shell Au/Ag bimetallic nanoparticles were characterized by absorption spectra and HRTEM. The MTMOS silicate sol-gel embedded Au73Ag27 core-shell nanoparticles modified electrode showed better synergistic electrocatalytic effect towards the reduction of hydrogen peroxide when compared to monometal MTMOS-Aunps and MTMOS-Agnps modified electrodes. These modified electrodes were studied without immobilizing any enzyme in the MTMOS sol-gel matrix. The present study highlights the influence of molar composition of Ag nanoparticles in the Au/Ag bimetallic composition towards the electrocatalytic reduction and sensing of hydrogen peroxide in comparison to monometal Au and Ag nanoparticles.


Core-shell Au/Ag nanoparticlesmodified electrodeelectrocatalysishydrogen peroxidesensor

Copyright information

© Indian Academy of Sciences 2009

Authors and Affiliations

  1. 1.Centre for Photoelectrochemistry, School of chemistryMadurai Kamaraj UniversityMaduraiIndia