Iridium alloys monoxide

Accelerated oxidation of alcohols was found when even 5% ruthenium was added to platinum [241]. It was noticed that alloys containing ruthenium have greater activity than pure platinum in the oxidation of propane, and alloys of platinum with rhodium and iridium were found to be less active. However, the oxidation rate of methane [100] decreased when even small amounts of ruthenium were added to the platinum. Accelerated oxidation of formic acid [224] and of hydrogen— carbon monoxide mixture [242] was observed in the presence of platinum and ruthenium alloys. An improvement in the characteristics of platinum electrodes with the addition of ruthenium was observed by Vielstich [224]. 

---