Binary nano-composites of Pt and nano-carbon (NC) and Pt and multiwalled carbon nanotube (MWCNT) have
been prepared with varied compositions ranging between 20 and 80wt% Pt and investigated them as electrocatalysts for
methanol oxidation. The study shows that with the increase in wt% of NC, the apparent electro-catalytic activity of the
composite catalyst increases initially, reaches maximum at about 40wt% NC and decreases thereafter. However, the
anodic peak current value, estimated as per mg of Pt present in the composite, increases gradually with increasing wt% of
NC in the composite. The electrochemical active surface area (EASA) value for Pt in the composite electrode also
increases with increasing the carbon composition in the composite. Almost similar effect of the MWCNT addition on the
electro-catalytic activity is also observed in the case of Pt-MWCNT composite. Results have shown that an incorporation
of carbon (NC/MWCNT) improves both the geometrical as well as the electronic properties of Pt.
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