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Title: Investigations of Gold-Graphene Nanocomposite for ORR in Aqueous Electrolytes
Authors: Kumar, Satendra
Kumar, Surender
Sathish, N
Singh, I B
Singh, Archana
Sanghi, S K
Keywords: Graphene;Gold nanoparticles;Nanocomposite;ORR;Aqueous electrolyte
Issue Date: Mar-2019
Publisher: NISCAIR-CSIR, India
Abstract: Oxygen reduction reaction (ORR) is an essential reaction step in fuel cell and metal-air batteries. The kinetics of ORR is very sluggish; it requires very high potential to occur. Many interesting articles have been published to enhance the kinetics. In this direction, we are working on metal nanoparticles modified graphene sheet. Gold nanoparticles are attached on two dimensional graphene sheets by in-situ reduction of metal ion in an aqueous reaction mixture. The synthesized nanocomposite is characterized by powder XRD, XPS and Raman spectroscopy. Microscopy image shows gold nanoparticles are attached to graphene sheets. ORR is studied in 0.1 M KOH and 0.1 M K2SO4 electrolytes. O2 reduction in aqueous electrolytes produces water molecules on gold-graphene nanocomposite.
Page(s): 62-65
Appears in Collections:AIR Vol.01(1) [March 2019]

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