Abstract
The catalytic activity for ethanol oxidation is studied as a function of the atomic composition of PtRu electrodeposits. Chronoamperometric curves taken at 0.5 V show that the current for ethanol oxidation at PtRu electrodeposits, measured 30 min after the application of a potential step from 0.05 V, increases in the presence of Ru up to a Ru content of about 40%. The highest value observed at 0.5 V vs. RHE was 30 μA/cm 2 at 25 °C. There is a relatively narrow range of PtRu compositions that present a high rate of ethanol oxidation. Pure Ru has no activity towards ethanol oxidation at room temperature.
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