Activity of Platinum-Gold Alloys for Glucose Electrooxidation in Biofuel Cells 

 -  The Journal of Physical Chemistry B, 111(34), p.10329-10333, 2007 .
<br/><br/> Carbon supported Pt-Au catalysts with different bimetallic compositions were prepared by water in oil (w/o)microemulsion. Carbon Vulcan XC-72 was added during the synthesis of particles in order to obtain their good dispersion and a mean particle size distribution of 5.02 ( 0.56 nm. Structural characterization was performed using XRD at wide angles (WAXS), which showed that Pt-Au particles exhibited alloy properties. Electrochemical characterization allowed to estimate the surface composition of Pt-Au alloys, which was close to that of the bulk material Pt20Au80. This catalyst composition displayed the best catalytic activity in steady-state conditions in comparison with Pt50Au50 or Pt and Au alone. Moreover, a Pt-Au/C catalyst with a metal loading of 40 wt