Graphene nanosheet-CNT hybrid nanostructure electrode for a proton exchange membrane fuel cell
Journal
International Journal of Hydrogen Energy
Journal Volume
37
Journal Issue
24
Pages
18989-18995
Date Issued
2012
Author(s)
Abstract
This work demonstrates two-step growth of graphene nanosheets (GNS), in which carbon nanotubes (CNTs) are grown directly on a carbon cloth. GNS are subsequently constructed on the CNT surface, revealing the stand-up structure of the GNS-CNT hybrid nanostructure. The GNS-CNT hybrid nanostructure shows Nernstian and fast electron-transfer kinetics for electrochemical reactions of Fe(CN)63-/4-. A 0.1 mg cm-2 Pt/GNS-CNT is used in the cathode of a proton membrane exchange fuel cell, in which the maximum power density is 1072 mW cm-2 at 80 °C under H2/O 2. In addition to a low-resistance electron-transfer pathway, the GNS-CNT hybrid nanostructure also provides numerous edge planes with strong electrochemical activity, ultimately enhancing electrochemical activity and fuel cell performance. Copyright © 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
SDGs
Publisher
Elsevier B.V.
Type
journal article