Synthesis and investigation of S-GQD electrocatalyst for oxygen evolution reaction in fuel cell

A facile hydrothermal synthesis route to graphene s and S quantum dots (GQDs) was developed using citric acid as the C source and thiourea as the S sources. S, doped GQD has high quantum yield. In this research, we present a cheap and easy method to fabricate S-GQDs electrocatalysts, which improve the OER reaction kinetics in fuel cell anodes.One of the challenges that have attracted the attention of mankind in recent decades is finding new and efficient methods to produce clean and renewable energy, which has encouraged researchers to find a suitable solution for producing energy with high efficiency and less pollution. Among the carbon materials that have attracted the attention of researchers, we can mention graphene, which has a two-dimensional nanomaterial structure. To increase the ability and performance of GQD, doping functional groups consisting of heteroatoms such as oxygen, nitrogen, sulfur, phosphorus, boron and so on, improve the energy level and optical and electrical properties. Oxygen recovery reaction (OER) is one of the basic electrochemical reactions in energy production systems such as fuel cells, water splitting reactions and metal batteries. It is air.This reaction can be done in alkaline, acidic and neutral environments. In alkaline environments, hydroxide groups are oxidized and turn into water and oxygen molecules. The slow kinetics of this reaction have led researchers to design and produce efficient electrocatalysts to overcome the high potential to create sufficient current density for this reaction.