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SiC nanocrystals as Pt catalyst supports for fuel cell applications
被引:73
作者:
Dhiman, Rajnish
[1
,2
]
Johnson, Erik
[3
]
Skou, Eivind M.
[2
]
Morgen, Per
[1
]
Andersen, Shuang M.
[2
]
机构:
[1] Univ Southern Denmark, Dept Phys Chem & Pharm, DK-5230 Odense M, Denmark
[2] Univ Southern Denmark, Dept Chem Engn Biotechnol & Environm Technol, DK-5230 Odense M, Denmark
[3] Univ Copenhagen, Niels Bohr Inst, Nano Sci Ctr, DK-2100 Copenhagen, Denmark
关键词:
SHAPE-MEMORY SYNTHESIS;
CARBON NANOTUBES;
SILICON MONOXIDE;
NANOPARTICLES;
PARAMETERS;
PLATINUM;
PEMFC;
FABRICATION;
CONVERSION;
CATHODE;
D O I:
10.1039/c3ta10238f
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
A robust catalyst support is pivotal to Proton Exchange Membrane Fuel Cells (PEMFCs) to overcome challenges such as catalyst support corrosion, low catalyst utilization and overall capital cost. SiC is a promising candidate material which could be applied as a catalyst support in PEMFCs. SiC nanocrystals are here synthesized using nano-porous carbon black (Vulcan (R) XC-72) as a template using two different reactions, which result in particle sizes in the ranges of 50-150 nm (SiC-SPR) and 25-35 nm (SiC-NS). Pt nano-catalysts of size 5-8 nm and 4-5 nm have successfully been uniformly deposited on the nanocrystals of SiC-SPR and SiC-NS by the polyol method. The SiC substrates are subjected to an acid treatment to introduce the surface groups, which help to anchor the Pt nano-catalysts. These SiC based catalysts have been found to have a higher electrochemical activity than commercially available Vulcan based catalysts (BASF & HISPEC). These promising results signal a new era of SiC based catalysts for fuel cell applications.
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页码:6030 / 6036
页数:7
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