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    Chemically and thermally reduced graphene oxide supported Pt catalysts prepared by supercritical deposition

    Year: 2022

    Journal: Int. J. Hydrog. Energy, Volume 47, MAY 26, page 19669–19689

    Authors: Samanci, Meryem; Yurtcan, Ayse Bayrakceken

    Organizations: BAP (Scientific Research Projects) Coordination Unit of Ataturk University [FDK-20208560]; BAP; YOK (Council of Higher Education) of Turkey for 100/2000 Priority Areas (Micro-Nanotechnology); TUBITAK-BIDEB (The Scientific and Technological Research Council of Turkey-Directorate of Science Fellowships and Grant Programmes) 2211/C Priority Areas (Energy/Hydrogen and Fuel Cells) doctoral scholarship programs

    Keywords: Reduced graphene oxide; Chemical reduction; Thermal reduction; SCCO2 deposition; PEM fuel Cell

    Reduced graphene oxide (RGO) is used in many energy applications, especially in Polymer Electrolyte Membrane (PEM) fuel cells, as carbon sourced catalyst support materials. In this study, thermally (T-RGO) and chemically (C-RGO) reduced GO support materials were synthesized for utilization in PEM fuel cells. Pt catalysts were synthesized using supercritical carbon dioxide (SCCO2) deposition technique over synthesized support materials. Physical (BET, SEM-EDX, FTIR, RAMAN, XRD, TEM, ICP-MS and optical tensiometer) and electrochemical (CV, PEM fuel cell test) characterizations of synthesized support materials and corresponding Pt catalysts were performed. The differences between the structures of thermally and chemically reduced graphene oxide supports and their Pt catalysts were investigated. The ECSA values of the Pt/T-RGO and Pt/C-RGO catalysts are 19.86 m(2) g(-1) and 6.31 m(2) g(-1), respectively. The current and power density values of the Pt/T-RGO and Pt/CRGO catalysts at 0.6 V are 84 mA cm(-2), 80 mA cm(-2) and 50 mW cm(-2), 45 mW cm(-2), respectively. Pt/T-RGO and Pt/C-RGO catalysts showed similar trend in PEMFC environment. (C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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