Abstract
A poled ferroelectric z-cut LiNbO 3 crystal was employed as a support, on which 100 nm Ag or Pd thin film metal catalyst was deposited, and the effects of resonance oscillation (RO) generated by a piezoelectric effect on the selectivity in the decomposition and the oxidation of alcohol have been examined. For ethanol decomposition of a Ag catalyst, RO increased the catalytic activity for ethylene production with little enhancement of acetaldehyde production, thus causing a significant increase in the ethylene production selectivity. For the same reaction on a Pd catalyst, RO increased the ethylene production activity remarkably. The selectivity changes were also observed for methanol oxidation on a Pd catalyst, in which the selectivity for formaldehyde production increased with a decrease in the selectivity for methyl formate production. A laser Doppler method showed that the lattice displacement vertical to the surface had an irregular pattern of standing waves up to 40 nm at 2 W. The mechanism of selectivity changes with the RO effects is discussed.
Published Version
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