Dissociation of formic acid on anatase TiO2(1 0 1) probed by vibrational spectroscopy

  • Autor:

    Xu, M. / Noei, H. / Buchholz, M. / Muhler, M. / Wöll, C. / Wang, Y. (2011)
  • Quelle:

    Catalysis today 1 (2011), 182, 12-15
  • Datum: 2011

  • Xu, M. / Noei, H. / Buchholz, M. / Muhler, M. / Wöll, C. / Wang, Y. (2011): „Dissociation of formic acid on anatase TiO2(1 0 1) probed by vibrational spectroscopy“. In: Catalysis today 1 (2011), 182, 12-15

Abstract

The interaction of formic acid with anatase TiO2 (1 0 1) has been monitored by infrared reflection absorption spectroscopy (IRRAS) using a novel ultrahigh vacuum (UHV) system. It was found that HCOOH molecules do not adsorb intact on TiO2 (1 0 1), as proposed previously, but dissociate yielding different formate species. The IR-bands observed in the IRRAS-data indicate the presence of a mono- and a bidentate species. It is proposed that the formation of the bidentate form requires the presence of oxygen vacancies.

 

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