121st General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code ELEC.P-599
Subject Electrochemically synthesized S-doped graphene from graphite foil for oxygen reduction and oxygen evolution reactions
Authors Jinheui Lee, Jun Ho Shim*
Department of Chemistry, Daegu University, Korea
Abstract Carbon nanomaterials such as graphene, carbon nanotube and carbon nanoparticle have attracted strong scientific and technological interests due to their unique chemical/physical properties, possibilities of mass production and control over the structural properties. Among them, graphene has shown great application potential in many files: energy, electronics, and biotechnology. Previous studies have shown that heteroatom-doped graphene materials can change the physical/chemical properties of pristine graphene and extend the possibilities of new science on graphene. Here, we have developed a simple electrochemical method to obtain bulk quantities of S-doped, reduced graphene oxide sheets (S-RGO) in the presence of sodium thiosulphate acting as a sulfur source. S-RGO exhibits much higher electrocatalytic activity toward oxygen reduction and oxygen evolution reactions than graphene, and much higher durability and selectivity than the original graphene for oxygen reduction. The excellent electrochemical performance of S-RGO is attributed to sulfur functional groups and the specific properties of graphene. This indicates that S-RGO is promising for applications in fuel cells and water splitting. The S-RGO materials are characterized by X-ray photoelectron spectroscopy, transmission electron microscopy, and Raman spectroscopy. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2016R1D1A1B03930895).
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