TY - JOUR ID - 614 TI - Facile Synthesis of N, S-Doped Graphene from Sulfur Trioxide Pyridine Precursor for the Oxygen Reduction Reaction JO - Hydrogen, Fuel Cell & Energy Storage JA - HFE LA - en SN - 2980-8537 AU - samiee, leila AU - sadeghhassani, sedigheh AU - Ganjali, Mohammad Reza AU - Rashidi, Alimorad AD - Energy Technology Research Division, Research Institute of Petroleum Industry (RIPI), West Blvd. Azadi Sport Complex, P.O. Box 14665-137, Tehran, Iran AD - Catalysis Research Division, Research Institute of Petroleum Industry (RIPI), Tehran, Iran AD - Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran AD - Nanotechnology Research Center, Research Institute of Petroleum Industry (RIPI), Tehran, Iran Y1 - 2018 PY - 2018 VL - 4 IS - 3 SP - 231 EP - 240 KW - Co-doped graphene KW - Metal-free catalyst KW - Oxygen reduction reaction DO - 10.22104/ijhfc.2018.2685.1162 N2 - In the work presented here, nitrogen and sulfur co doped on porous graphene was synthesized using pyrolysis at 900°C for 2h and the hydrothermal technique at 180°C for 24h as metal-free electrocatalysts for oxygen reduction reaction (ORR) under alkaline conditions. All the materials have been characterized by Scanning Electron Microscopy (SEM) and X-ray photo-electron spectroscopy (XPS). Moreover for electrochemical evaluation of samples, Rotating Disk electrode (RDE) and Cyclic Voltammetry techniques (CV) were employed. The results showed that co-doping of S and N into porous graphene significantly enhance the ORR performance. Moreover, it is revealed that the catalyst prepared by the pyrolysis method shows outstanding catalytic activity for the ORR for which the number of electron in the pyrolysis method was calculated to be 4.1; whereas it became 2.6 in the hydrothermal approach. So regarding the obtained results, it can be stated that the samples prepared through the pyrolysis method exhibits excellent resistance towards methanol crossover effects, indicating their promising potential as ORR electrocatalysts for alkaline fuel cells. UR - https://hfe.irost.ir/article_614.html L1 - https://hfe.irost.ir/article_614_b0d2680c8ee0af622400b32b4ea23f93.pdf ER -