Three-dimensional network of graphene grown with carbon nanotubes as carbon support for fuel cells

A thermally reduced graphene oxide (TRGO) grown with carbon nanotubes composite (G-CNT) was utilized as three-dimensional highly conductive carbon scaffolds, where a large amount of small and homogeneous Pt nanoparticles (from 3.37 ± 1.22 to 4.24 ± 1.83 nm) was directly synthesized on G-CNT to acqui...

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Bibliographic Details
Published in:Energy (Oxford) 2013-05, Vol.53, p.282-287
Main Authors: Jhan, Jing-Yi, Huang, Yu-Wei, Hsu, Chun-Han, Teng, Hsisheng, Kuo, Daniel, Kuo, Ping-Lin
Format: Article
Language:English
Subjects:
Applied sciences
Carbon
Carbon nanotubes
Catalysts
electrical conductivity
Electrocatalysis
electrochemistry
Electrode
electrodes
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fuel cells
Graphene
graphene oxide
nanocomposites
Nanoparticles
Platinum
surface area
Three dimensional
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Summary:A thermally reduced graphene oxide (TRGO) grown with carbon nanotubes composite (G-CNT) was utilized as three-dimensional highly conductive carbon scaffolds, where a large amount of small and homogeneous Pt nanoparticles (from 3.37 ± 1.22 to 4.24 ± 1.83 nm) was directly synthesized on G-CNT to acquire a new type of catalyst (Pt/G-CNT). Meanwhile, Pt nanoparticles loaded on TRGO (Pt/TRGO) and on TRGO blended with carbon nanotubes (Pt/G-b-CNT) were prepared for comparison. The G-CNT showed a very high electrical conductivity (144.4 S cm−1) compared to the G-b-CNT (67.5 S cm−1) and TRGO (9.1 S cm−1). In contrast to Pt/G-b-CNT (36.8 m2 g−1) and Pt/TRGO (28.1 m2 g−1), Pt/G-CNT showed a very high electrochemically active surface area (77.4 m2 g−1). As these catalysts were utilized as the anode for the fuel cell, the maximum power density value for Pt/G-CNT (32.0 mW cm−2) was about 65% and 74% higher than that of Pt/G-b-CNT (19.4 mW cm−2) and Pt/TRGO (18.4 mW cm−2), respectively, and 26% higher than that of E-TEK (25.4 mW cm−2). ► A thermally reduced graphene oxide grown with CNT composite (G-CNT) was utilized as 3D highly conductive carbon scaffolds. ► The maximum current density for Pt/G-CNT was 23% higher than that of the commercial catalyst (E-TEK). ► The maximum power density value for Pt/G-CNT was 26% higher than that of E-TEK.
ISSN:0360-5442
DOI:10.1016/j.energy.2013.03.002