@article{Pham:2016:10.1149/2.0891603jes,
author = {Pham, KC and McPhail, DS and Mattevi, C and Wee, ATS and Chua, DHC},
doi = {10.1149/2.0891603jes},
journal = {Journal of the Electrochemical Society},
pages = {F255--F263},
title = {Graphene-Carbon Nanotube Hybrids as Robust Catalyst Supports in Proton Exchange Membrane Fuel Cells},
url = {http://dx.doi.org/10.1149/2.0891603jes},
volume = {163},
year = {2016}
}

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TY  - JOUR
AB  - Catalyst degradation is one major challenge preventing the worldwide commercialization of the Proton Exchange Membrane Fuel Cells. In this study, we investigate the development of a novel hierarchical carbonaceous support for the platinum catalysts, called graphene-carbon nanotube hybrids (GCNT), and its degradation behavior during an accelerated degradation test. The carbon support is fabricated by growing graphene directly onto carbon nanotubes to form a unique all-carbon nanostructure possessing both an ultra-high density of exposed graphitic edges of graphene and a porous structure of carbon nanotubes. The GCNT-supported platinum catalyst exhibits a higher intrinsic catalytic activity than a carbon black-supported platinum catalyst, and much higher than a CNT-supported platinum catalyst. The enhanced catalytic activity of the GCNT-supported platinum catalyst is explained by the high graphitic edge density which promotes the catalytic reactions on platinum catalyst. The GCNT-supported platinum catalyst also exhibits a superior electrochemical stability over that of the carbon black-supported platinum catalyst, explained by the high crystallinity of the GCNT support. The superior stability is expressed by a lower loss in polarization performance, a smaller increase in charge transfer resistance, a lower loss in the platinum electrochemical surface area, a lower rate of carbon corrosion, and a more stable catalyst microstructure.
AU  - Pham,KC
AU  - McPhail,DS
AU  - Mattevi,C
AU  - Wee,ATS
AU  - Chua,DHC
DO  - 10.1149/2.0891603jes
EP  - 263
PY  - 2016///
SN  - 0013-4651
SP  - 255
TI  - Graphene-Carbon Nanotube Hybrids as Robust Catalyst Supports in Proton Exchange Membrane Fuel Cells
T2  - Journal of the Electrochemical Society
UR  - http://dx.doi.org/10.1149/2.0891603jes
UR  - http://hdl.handle.net/10044/1/37534
VL  - 163
ER  - 

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