title: Covalent hybridization of thiolated graphene sheet and platinum nanoparticles for electrocatalytic oxygen reduction reaction.
abstract: A covalently bonded thiolated graphene sheet-supported platinum electrocatalyst (GOS-Pt) has synthesized for electrochemical oxygen reduction reaction (ORR) in neutral media. The catalyst's structural features are characterized by transmission electron microscopy (TEM), energy dispersive X-ray (EDX), and X-ray photoelectron spectroscopy (XPS). Its activity towards the ORR has investigated by using cyclic voltammetry (CV), rotating disk electrode (RDE), and rotating ring disk electrode (RRDE) in 0.1 mol l(-1) phosphate buffer solution (PBS) at pH 7, which is also used to assess the catalyst's kinetic parameters. On a glassy carbon electrode (GCE), the catalyst shows a significant catalytic activity, with its electrocatalysis of O2 reduction occurring via four-electron transfer reduction to H2O with minimal generation of H2O2.
authors: Department of Chemistry, Institute of Basic Science, Chonnam National University, Gwangju 500-757, Korea.
authors: Mohammad Shamsuddin
authors: MS
authors: Ahmed
authors: Daekun
authors: D
authors: Kim
authors: Hyoung Soon
authors: HS
authors: Han
authors: Haesang
authors: H
authors: Jeong
authors: Seungwon
authors: S
authors: Jeon
mesh_terms: D002384:Catalysis; D004563:Electrochemistry / Q000379:methods*; D006108:Graphite / Q000737:chemistry*; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry*; D008839:Microelectrodes; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D013438:Sulfhydryl Compounds; D014867:Water; D010984:Platinum; D006108:Graphite; D010100:Oxygen