Platinum-supported mesoporous carbon (Pt/CMK-3) as
anodic catalyst for direct methanol fuel cell applications:
The effect of preparation and deposition methods |
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Authors: | Balaiah Kuppan and Parasuraman Selvam |
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Institution: | National Centre for Catalysis Research and Department of Chemistry, Indian Institute of Technology-Madras,Chennai 600 036, India |
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Abstract: | Platinum-supported ordered mesoporous carbon catalysts were prepared employing
colloidal platinum reduced by four different reducing agents, viz., paraformaldehyde, sodium
borohydride, ethylene glycol and hydrogen, and deposited over ordered mesoporous carbon
(CMK-3) synthesized by silica hard template (SBA-15). The resulting platinum nanoparticles
supported mesoporous carbon, designated as Pt/CMK-3, catalysts were tested for the electocatalytic
oxidation of methanol. The effect of the various reduction methods on the influence of particle
size vis- a-vis on the electrocatalytic effect is investigated. All the catalysts were systematically
characterized by XRD, BET and TEM. The results of the synthetic methods, characterization
techniques and the electrocatalytic performance indicate that the Pt/CMK-3 catalysts are superior
to that prepared with activated carbon (Pt/AC) as well as with that of the commercial platinumsupported
carbon catalyst (Pt/E-TEK). In particular, the catalyst, Pt/CMK-3, prepared using
paraformaldehyde reduced platinum showed much higher activity and long-term stability as
compared to the other reducing methods. |
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Keywords: | Mesoporous carbon CMK-3 Nano-platinum Electrocatalyst Methanol oxidation Fuel cell |
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