A Vibrational Spectroscopy Study of CH3COOH, CH3COOD and (13)CD3COOH(D) Adsorption on Pt(111). 1. Surface Dimer Formation and Hydrogen Bonding
Interim technical rept.,
CALIFORNIA UNIV IRVINE DEPT OF CHEMISTRY
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Acetic acid CH3COOH,-CH3COOD and 13CD3COOHD adsorption on Pt 111 at 168 K has been studied as a function of surface coverage with HREELS. At low acetic acid dosages dissociative adsorption occurs forming a surface acetate species. Further dissociative adsorption as COaorCH3afrom acetic acid adsorption is ruled out based on the absence of their characteristic vibrational modes. Molecular adsorption occurs at moderate acetic acid dosages with a fingerprint peak at 932 cm-1 for CH3COOH and 13CD3COOH adsorbates. This mode corresponds to a well documented OH mode of the acetic acid dimer.
- Physical Chemistry