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The electrooxidation of 0.1 M 1-propanol and 2-propanol in 0.1 M HClO 4 on smooth Pt and electrodeposited Pt and Pt 0.89 Ru 0.11 was studied by cyclic voltammetry and in situ Fourier transform infrared spectroscopy (FTIRS). On smooth Pt, CO 2 as well as partially oxidized products (propionic acid from 1-propanol and acetone from 2-propanol) was detected. A strong catalytic enhancement toward the oxidation to CO 2 is observed on electrodeposited Pt for both 2-propanol and 1-propanol, thus showing the effect of the roughness of the electrode on the electrooxidation process. However, propionic acid from 1-propanol and acetone from 2-propanol were still detected. In contrast to these results, CO 2 was the only oxidation product on Pt 0.89 Ru 0.11 for both alcohols.
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Rodrigues et al. (1997) studied this question.
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