Abstract

The discovery of two-dimensional carbonaceous crystal by Andre Geim and Konstatin Novoselov in 2004 at the University of Manchester opened new paths in various fields around the world [1]. Graphene attracted the researchers around the globe owing to its unique features such as high surface area, high electric conductivity, high flexibility and many more which lead to the announcement of Noble prize in 2010 to its discovers [1]. Graphene serves as an excellent support to host various metal oxides. Graphene offers its massive surface to anchor metal oxides along with preventing the agglomeration of the metal oxide nanoparticles during their assembly in the process of forming the composite [2]. Even the small deviation on the surface of the graphene layer causes significant change in electric conductivity which makes the developed material extremely sensitive to their environment and thus elevating the electrochemical performance of the prepared composites [3]. These two properties make graphene a highly dependable candidate as a support for the active materials in the H₂O₂ sensing.