Abstract
Using a rotating Pt electrode, the simultaneous electro‐oxidation of methanol and electroreduction of 
was studied in 
saturated 0.5M 
solutions containing dissolved methanol. The two processes occurred with no apparent interaction above 0.8 V vs. a reversible 
electrode. At potentials below 0.8 V the net oxidation/reduction current is smaller (i.e., less cathodic) than would be expected if the reactions occurred with no interaction. The evidence suggests that the effect is due to partial poisoning of the 
reduction process by adsorbed methanol. At sufficiently low potentials (∼0.4 V), 
electroreduction reaches the same diffusion‐limited whether or not methanol is added. The mechanism of 
electroreduction appears to remain unchanged in the presence of methanol.