Photolysis of the CO2 + K/Au(111) system

Arnold Péter Farkas, Frigyes Solymosi

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Photoinduced activation of CO2 was investigated on a K-dosed Au(111) surface. The methods used were work function measurements, high-resolution electron energy loss spectroscopy (HREELS), and thermal desorption spectroscopy. Illumination of CO2 adsorbed on a clean Au(111) surface with a 65 W Hg arc lamp produced no HREEL spectral signals indicative of the formation of CO2-. As was revealed in a previous paper (Farkas and Solymosi, J. Phys. Chem. C 2009, 113, 19930), potassium adatoms induce the formation of negatively charged CO2 on Au(111). Illumination of the CO2 + K/Au(111) system enhanced (i) the electron transfer from K-dosed Au to CO2, (ii) the amount of strongly adsorbed CO2, (iii) the formation of CO, and (iv) the intensity of the vibration loss of the asymmetric stretch of CO2-. It is assumed that the photoelectrons play a role in the photolysis of the CO 2 + K coadsorbed layer.

Original languageEnglish
Pages (from-to)16979-16982
Number of pages4
JournalJournal of Physical Chemistry C
Issue number40
Publication statusPublished - Oct 14 2010

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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