Abstract
We have employed inelastic neutron scattering (INS) to observe the vibrational spectrum of formate (HCOO) produced by the room-temperature adsorption of formic acid on a range of reduced and oxidised copper surfaces. In both cases the higher scattering of the adsorbate, HCOO, compared with the substrate allowed the adsorbate spectrum to be readily observed. The most intense formate fundamental vibrations were those directly involving deformation of the C–H bond. In addition, a number of other formate-related modes were observed below 700 cm −1, some with considerable intensity. The data are compared with INS spectra of formate compounds, and agree well with calculated INS spectra.
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