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    Pt-Sn/C as a possible methanol-tolerant cathode catalyst for DMFC

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    Martin_Pt-SnC_2013.pdf (1.236Mb)
    Date
    2013
    Author
    Martin, Lynwill G.
    Green, Ivan
    Wang, X.
    Pasupathi, Sivakumar
    Pollet, Bruno G.
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    Abstract
    An effective method was developed for preparing highly dispersed nano-sized Pt–Sn/C electrocatalyst synthesised by a modified polyol reduction method. From XRD patterns, the Pt–Sn/C peaks shifted slightly to lower 2θ angles when compared with commercial Pt/C catalyst, suggesting that Sn formed alloy with Pt. Based on HR-TEM images, the Pt–Sn/C nanoparticles showed small particle sizes and well dispersed onto the carbon support with a narrow particle distribution. The methanol oxidation reaction on the as-prepared Pt–Sn/C catalyst appeared at lower currents (+7.08 mA at +480 mV vs. Ag/AgCl) compared to the commercial Pt/C (+8.25 mA at +480 mV vs. Ag/AgCl) suggesting that the Pt–Sn/C catalyst has ‘methanol tolerance capabilities’. Pt–Sn/C HA Slurry pH3 catalysts showed better activity towards the oxygen-reduction reaction (ORR) than commercial Pt/C which could be attributed to smaller particle sizes. In our study, the Pt–Sn/C catalyst appears to be a promising methanol-tolerant catalyst with activity towards the ORR in the DMFC.
    URI
    http://dx.doi.org/10.1007/s12678-013-0131-8
    http://hdl.handle.net/10566/3378
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