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(Digital Presentation) Thermally Reduced Graphene Oxide (TRGO) and TiO2 supported Pt Catalyst for Polymer Electrolyte Membrane Fuel Cells

Wednesday, 1 June 2022: 11:20
West Meeting Room 202 (Vancouver Convention Center)
B. Padmavathi (Indian Institute of Technology, Madras)
Thermally reduced graphene oxide (TRGO), TiO2, and Pt-based two catalyst systems were synthesized in two different approaches 1) Pt deposited on TRGO_TiO2 supports (TRGO_TiO2_Pt) synthesized via chemical reduction and also, 2) Pt deposited on TRGO_TiO2 supports synthesized via hydrothermal (TRGO_TiO2_HT_Pt) method. The graphite oxide (synthesized via improved hummer's method) was thermally treated (calcined) to synthesize reduced graphene oxide in one step. Calcination temperature 350 °C was optimized from Raman spectroscopy. In both the catalyst systems, TiO2 nanoparticles were uniformly deposited on TRGO; later, Pt is deposited via the chemical reduction method. Preliminary characterization techniques such as XRD, Raman, FTIR, SEM, and TEM have been performed on the catalyst systems. The electrochemical and PEMFC performance has been investigated by cyclic voltammetry, ORR studies, and fuel cell testing. The catalyst system's fuel cell performance was compared with the standard and commercial Pt/C catalyst. The TRGO_TiO2_Pt and TRGO_TiO2_HT_Pt showed power density of 180 mW/cm2 and 210 Mw/cm2 respectively with the comparison of standard Pt/C 266 mW/cm2.