Abstract
The anodic oxidation of ethylene in 1.5M sulfuric acid at 80 °C has been shown to occur at a gold‐coated platinum electrode with a Tafel slope of 0.083V. The effect of variation of the weight of electrodeposited gold and also of temperature were studied. The products were carbon dioxide, acetone, acetaldehyde, and propionaldehyde, the Faradaic efficiency of conversion to carbon dioxide being 20% at 0.79V (vs. NHE). The addition of surface active agents to the electrolyte tended to increase the overpotential for ethylene oxidation at platinum and gold electrodes. The effect was particularly pronounced in the case of cetyl pyridinium bromide, probably because of preferential adsorption of bromide ions on the electrodes. Partial anodic oxidation of acetylene in 1.5M sulfuric acid was observed at the gold electrode at 80°C.Much less oxidation was observed for methane and ethane.
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