High Performance Electrocatalyst for Oxygen Reduction Reaction by Carbonized Nanoscale MOFs
Paper ID : 1203-ICNS
Authors:
zeynab abkar *1, zeynab abkar2
1Department of Analytical Chemistry, Faculty of Chemistry, University of Mazandaran, 3rd Kilometer of Air Force Road, Postal Code: 47416-95447, Babolsar, Iran
2Department of ElectroAnalytical Chemistry, University of Mazandaran, Babolsar
Abstract:
Nanocomposites based on Co-Pt nanoparticles encapsulated in nitrogen-doped porous carbons were prepared as a new type of high-performance electrocatalysts for oxygen reduction reaction (ORR). Controlled pyrolysis of zeolitic imidazolate framework 67 (ZIF-67) led to the formation of Co nanoparticles encapsulated in nitrogen-doped porous carbon (Co-NC), which underwent using a reducing agent forming the Co-Pt nanoparticles encapsulated in nitrogen-doped porous carbon composite and investigation of its electrocatalytic activity toward ORR. The physical and electrochemical characterization of the materials are achieved by X-ray diffraction (XRD), energydispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), nitrogen adsorption/desorption and cyclic voltammetry (CV) methods. This composite is tested for the Oxygen reduction reaction (ORR) in 2 M H2SO4 solution. The linear sweep voltammetry (LSV) results have shown that the Co-Pt/NC composite coated on gas diffusion electrode (GDE) exhibit high current density and less negative value of potential towards ORR. The performance of prepared electrocatalyst is comparable to that of Pt/C in acidic electrolytes. This is attributed to synergetic effect of the Co-Pt bimetallic catalyst and uniform distribution of the Pt nanoparticles at the electrode surface.
Keywords:
Co-Pt nanoparticles, ZIF-67, Electrocatalysis, ORR, PEMFC
Status : Abstract Accepted (Poster Presentation)