Depending on the surface preparation conditions, Au(111) supported TiO2 nanoparticles react with small alcohols to form either reduced and oxidized products. The desire to selectivity form oxidized or reduced products merits an investigation of alcohol reactivity over differently prepared TiO2/Au(111) surfaces. In this work, a systematic study of ethanol reactivity over several TiO2/Au(111) surfaces elucidates the effect of surface conditions on the selectivity of the reaction between ethanol and TiO2/Au(111). The reactivity of the surface for ethanol oxidation was altered by controlling the oxidation state of TiOx (x&lt;2). Atomic force microscopy (AFM) provides information regarding the structure of the Au(111) supported TiO2 nanoparticles and ultrahigh vacuum temperature programmed desorption (TPD) monitors the selectivity of the reaction between ethanol and TiO2/Au(111). Low coverages of fully oxidized TiO2 nanoparticles on Au(111) are active for the selective oxidation of ethanol to form acetaldehyde.

Selective oxidation of ethanol to acetaldehyde over TiO2/Au(111)

256th National Meeting (2018)

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