Imperial College London

DrCeciliaMattevi

Faculty of EngineeringDepartment of Materials

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 0833c.mattevi

 
 
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Location

 

2.11Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@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}
}

RIS format (EndNote, RefMan)

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 -