Abstract
In this work we investigate the acetaldehyde electrooxidation reaction on PtRh electrodeposits as a function of their composition. Potentiodynamic results show that the balance between CO 2 and acetic acid pathways depends on the PtRh composition. By using in situ FTIR we interpret this dependence in terms of a dual role played by Rh during acetaldehyde electrooxidation. Rh seems to favor the break of C–C bonds (favoring the production of CO 2) whilst prevents the deliverance of oxygen-containing species, thus inhibiting the oxidation steps.
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