Thermodynamically controlled Pt deposition over graphene nanoplatelets: effect of Pt loading on PEM fuel cell performance

Daş, Elif and Alkan Gürsel, Selmiye and Işıkel Şanlı, Lale and Bayrakçeken Yurtcan, Ayşe (2017) Thermodynamically controlled Pt deposition over graphene nanoplatelets: effect of Pt loading on PEM fuel cell performance. International Journal of Hydrogen Energy, 42 (30). pp. 19246-19256. ISSN 0360-3199 (Print) 1879-3487 (Online)

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Abstract

Graphene is considered as a promising catalyst support for polymer electrolyte membrane (PEM) fuel cells because of its excellent properties. Recent studies showed that electrocatalytic activity, fuel cell performance, catalyst utilization efficiency and long term durability can be improved by using graphene as the catalyst support. In here, we report the synthesis of graphene nanoplatelets (GNPs) supported platinum catalysts using supercritical carbon dioxide (scCO2) deposition technique. The prepared catalysts were characterized in terms of their structure, morphology and thermal behavior by using X-ray diffraction (XRD) analysis, transmission electron microscopy (TEM), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The electrocatalytic and half-cell performances of the as-prepared catalysts were investigated by cyclic voltammetry (CV) and PEM fuel cell performance testing. Small size and well distribution of Pt nanoparticles on GNPs surfaces were achieved by using scCO2 deposition which improves the PEM fuel cell performance. To the best of our knowledge decoration of Pt nanoparticles on GNPs via scCO2 deposition and their detailed fuel cell performances were presented for the first time in the literature.
Item Type: Article
Uncontrolled Keywords: Graphene nanoplatelets; PEM fuel cell; Platinum; Supercritical carbon dioxide deposition
Subjects: T Technology > T Technology (General)
Q Science > QD Chemistry
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Faculty of Engineering and Natural Sciences > Basic Sciences > Chemistry
Sabancı University Nanotechnology Research and Application Center
Faculty of Engineering and Natural Sciences
Depositing User: Selmiye Alkan Gürsel
Date Deposited: 19 Aug 2017 12:46
Last Modified: 22 May 2019 13:54
URI: https://research.sabanciuniv.edu/id/eprint/32959

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