Effects of acoustic waves generated on a positively polarized lead strontium zirconium titanate substrate upon catalytic activity of a deposited Ag thin film
N. Saito et al., Effects of acoustic waves generated on a positively polarized lead strontium zirconium titanate substrate upon catalytic activity of a deposited Ag thin film, SOL ST ION, 136, 2000, pp. 819-823
A positively polarized lead strontium zirconium titanate (PSZT) substrate w
as employed for the generation of thickness-extensional mode resonance osci
llation (TERO), and the effects of TERO on the catalytic activity and the s
urface properties of a 100-nm Ag film catalyst deposited on the substrate w
ere investigated. The catalytic activity for ethanol oxidation increased 18
-fold with TERO at 3 W. In low energy photoelectron spectroscopy, a thresho
ld energy for photoelectric emission from the Ag surface shifted linearly t
o the lower energy side with increasing power of TERO, thus indicating a de
crease in the work function of the Ag surface. On the basis of the behavior
of lattice displacement measured by a laser Doppler method, a model for ch
anges in catalytic activity and work function is proposed. (C) 2000 Elsevie
r Science B.V. All rights: reserved.