Korean Journal of Chemical Engineering, Vol.27, No.3, 802-806, 2010
The effect of PtRuW ternary electrocatalysts on methanol oxidation reaction in direct methanol fuel cells
PtRu and PtRuW ternary electrocatalysts were synthesized using an NaBH4 reduction method. A uniform distribution of particles, with average particle size of 3-3.5 nm was indentified from X-ray diffraction (XRD) and transmission electron microscopy (TEM). The electrochemically active surface area was slightly decreased after the addition of W into PtRu. When W was added to PtRu, the specific and mass activity of methanol electro-oxidation was increased. The most active catalyst was Pt5Ru4W, of which specific and mass activities were 265.38 mA/m2 and 6.21 A/g.catal, respectively. The specific and mass activity was 390 and 320% higher than that of PtRu.
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