Electrochemical studies of NC, S, N-CNT and Fe-NC/ S, N-CNT structures to provethe importance of metal in carbon base structure as active site during the oxygenreduction reaction

The commercialization of polymer electrolyte fuel cells (PEFCs) is partly delayed due to the use ofexpensive and scarce precious metal catalysts for the oxygen reduction reaction (ORR) [۱]. Transition metaland nitrogen-containing carbon materials (M-N/C) could potentially replace Pt. Some materials based onMOFs show significantly higher activities. These materials can be doped with different metal centers andreadily forms self-supporting ORR active carbon catalysts upon pyrolysis [۲]. Physicochemicalcharacterizations of the Fe-N/C material suggest atomic metal centers as active sites. Also, the porous crystalstructure of MOF has unique and structurally chemical properties. In this work, a Fe-N/C catalyst was singledout for in-depth investigation together with a metal-free N/C catalyst for comprising, and then compared to thecommercial Pt/C in O۲ saturated ۰.۵ M H۲SO۴. A methodology has been presented, where Fe salt does notexist (CN), the metal salt is added in the precursor along with polymer (NC/S,N-CNT) and in the primary MOFthat was name Fe-NC/S,N-CNT. The results show that Fe base Electrocatalyst obtain a higher half-wavepotential than a nitrogen-doped sample [۳]. The fact that the micro porous surface areas of the templatesupport the hypothesis of an active site that was host in the micro pores also, the metal ion indeed alters theproperties of the free electrons in the structure

کلیدواژه ها:

MOF-based Electrocatalyst ، Oxygen reduction reaction ، RDE