The electrosorption and the potentiodynamic electrooxidation of ethane on platinized platinum in 1N H2SO4 has been studied in the 20°–80°C range. The potentiodynamic I/E profiles run immediately after the potentiostatic electrosorption of the hydrocarbon show that three different species participate in the electrooxidation process. The various electrosorbed species are tentatively related to the electrosorbed species which are formed during the electrosorption of both methane and ethylene on platinum. The electrochemical process is discussed through a complex reaction pathway involving electrosorption, interconversion, and electrooxidation processes.

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