Electrocatalytic performance of silica nanoparticles on graphene oxide sheets for hydrogen peroxide sensing

► A novel graphene oxide-silica nanoparticles composite was synthesized. ► The composite has good electrochemical activity for detection of hydrogen peroxide. ► The catalytic property of silica nanoparticles was enhanced with graphene oxide. ► These composites are promising materials for development of nonenzymatic sensors.