Preparation and electrochemical activity of platinum catalyst-supported graphene and Fe-based metal-organic framework composite electrodes for fuel cells

Platinum catalysts supported on reduced graphene oxide (rGO) and an N-doped iron-based metal-organic framework (Fe-MOF) composite were prepared, and their activity was analyzed. The Pt-rGO/Fe-MOF composites were synthesized using hydrothermal and polyol processes in a Teflon-lined autoclave. Electroactivities were measured by cyclic voltammetry and chronoamperometry, and morphological analysis was performed using field emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The composite material provides a small particle size, homogeneous dispersion, large adsorption area of platinum and it is used as an effective electron and proton transport path, so exhibits high electrochemical surface area and excellent methanol oxidation performance. The electrochemical properties of PtrGO/Fe-MOF are better than those of Pt-rGO or pristine Pt-(Fe-MOF), which demonstrates that rGO/FeMOF could be used as a promising catalyst support for direct methanol fuel cells (c) 2021 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.