Işıkel Şanlı, Lale and Bayram, Vildan and Ghobadi, Sajjad and Düzen, Nilay and Alkan Gürsel, Selmiye (2016) Engineered catalyst layer design with graphene-carbon black hybrid supports for enhanced platinum utilization in PEM fuel cell. International Journal of Hydrogen Energy . ISSN 0360-3199 (Print) 1879-3487 (Online) Published Online First http://dx.doi.org/10.1016/j.ijhydene.2016.08.210
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Official URL: http://dx.doi.org/10.1016/j.ijhydene.2016.08.210
Abstract
In this study, a new approach was applied to prepare platinum/reduced graphene oxide/carbon black (Pt/rGO/CB) hybrid electrocatalysts. Unlike literature firstly GO and CB in varying ratios are homogeneously mixed with a high shear mixer and then Pt was impregnated onto the hybrid support structure according to the polyol method. According to our approach CB was used as a spacer and intercalating agent in both Pt impregnation and electrode preparation to avoid restacking and increase the Pt utilization. Thus rGO/CB based hybrid support can ease the diffusion while it is promoting to the use of high electrical connectivity and surface area of graphene. The maximum power density of 645 mW cm−2 with Pt utilization efficiency of 2.58 kW/gPt was achieved with the hybrid containing the smallest amount of CB. It seems that this small amount of CB effectively modifies the electrode structure. The enhanced fuel cell performance can be attributed to synergistic effects from graphene and CB providing better mass transport and Pt utilization in the catalyst layer.
Item Type: | Article |
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Uncontrolled Keywords: | PEM fuel cell; Platinum; Graphene; Carbon black; Hybrid support |
Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry T Technology > TD Environmental technology. Sanitary engineering > TD169-171.8 Environmental protection T Technology > T Technology (General) > T174.7 Nanotechnology |
Divisions: | Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng. Sabancı University Nanotechnology Research and Application Center Faculty of Engineering and Natural Sciences |
Depositing User: | Lale Işıkel Şanlı |
Date Deposited: | 05 Oct 2016 10:31 |
Last Modified: | 26 Apr 2022 09:33 |
URI: | https://research.sabanciuniv.edu/id/eprint/29675 |
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