Layer-by-layer polypyrrole coated graphite oxide and graphene nanosheets as catalyst support materials for fuel cells

Saner Okan, Burcu and Alkan Gürsel, Selmiye and Yürüm, Yuda (2013) Layer-by-layer polypyrrole coated graphite oxide and graphene nanosheets as catalyst support materials for fuel cells. Fullerenes, Nanotubes and Carbon Nanostructures, 21 (3). pp. 233-247. ISSN 1536-383X (Print) 1536-4046 (Online)

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Abstract

For the production of advanced types of catalyst support materials, the distinguished properties of graphene nanosheets were combined with the structural properties of conducting polypyrrole by the incorporation of graphene nanosheets into a polymer matrix by the proposed simple and low-cost fabrication technique. A precise tuning of electrical conductivity and thermal stability was achieved by controlling the polymer thickness of randomly dispersed graphene nanosheets. Initially, graphene nanosheets were fabricated in large quantities via a mild chemical synthetic route involving graphite oxidation, ultrasonic treatment, and chemical reduction. Then, polypyrrole/graphene nanosheet composites with improved conductivity, thermal stability, and high surface area were synthesized by in situ polymerization with the different pyrrole feed ratios. Although graphite oxide sheets have electrically insulating property, partially oxidized graphite oxide was also utilized as conductive fillers in polymer matrix. However, polypyrrole/graphene nanosheet composites have better electrical conductivity than polypyrrole/graphite oxide composites.
Item Type: Article
Uncontrolled Keywords: Graphite oxide, graphene nanosheets, conducting polymer, nanocomposites, catalyst support
Subjects: T Technology > TP Chemical technology > TP0155-156 Chemical engineering
Divisions: Faculty of Engineering and Natural Sciences > Basic Sciences > Chemistry
Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Faculty of Engineering and Natural Sciences
Depositing User: Yuda Yürüm
Date Deposited: 09 Nov 2012 11:54
Last Modified: 22 May 2019 12:54
URI: https://research.sabanciuniv.edu/id/eprint/19990

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