title: Using 2-mercaptobenzothiazole as a nitrogen and sulfur precursor to synthesize highly active Co-N-S/C electrocatalysts for oxygen reduction.
abstract: Novel Co-N-S/C catalysts supported on carbon were obtained using a two-step procedure. The procedure consisted of the synthesis of a carbon-supported Co-2-mercaptobenzothiazole (denoted as Co-MBT/C) complex using a solvent-milling method and the pyrolysis of the Co-MBT/C complex. 2-Mercaptobenzothiazole (MBT) was used as the nitrogen and sulfur ligand for Co-MBT complex formation. X-ray diffraction (XRD), TEM, EDS and elemental mappings were used to characterize the structure changes in these catalysts before and after the heat-treatment. Several catalysts were synthesized by varying the amount of cobalt salt and pyrolysis temperature. The results showed that the optimal cobalt salt content and pyrolysis temperature were around 25 wt% and 800°C. Under the optimal conditions, an onset potential of 0.20 V and a half-wave potential of 0.05 V were reached in an alkaline electrolyte, and the Co-N-S/C catalyst possessed high catalytic activity and catalytic stability towards an oxygen reduction reaction (ORR). These results indicated that Co-N-S/C is a promising catalyst for the ORR.
authors.affiliation: Department of Chemistry, Xinxiang Medical University, Henan, Xinxiang, P. R. China. chaoshujun1979@sina.com
authors.forename: Shujun
authors.initials: S
authors.lastname: Chao
authors.forename: Wei
authors.initials: W
authors.lastname: Guo
mesh_terms: D052160:Benzothiazoles / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D009584:Nitrogen / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D052160:Benzothiazoles; D009942:Organometallic Compounds; D013438:Sulfhydryl Compounds; D003035:Cobalt; D013455:Sulfur; D002244:Carbon; D009584:Nitrogen; D010100:Oxygen