Article,
Effect of substrate preparation on the structure and chemisorption properties of Pd/MgO model catalyst
J. Vac. Sci. Technol. A, (1988)
Abstract
Pd/MgO model catalysts are prepared by vapor deposition of Pd particles
on MgO thin films which are deposited, at different temperatures,
on UHV cleaved mica. MgO films and Pd particles are characterized
in situ by Auger electron spectroscopy and energy-loss spectroscopy
and ex situ by transmission electron microscopy. Successive temperature
programmed desorption (TPD) of CO shows a different evolution of
the morphology of the Pd particles deposited on MgO films prepared
at low and high temperature. In addition, on MgO prepared at low
temperature, the smallest particles show a continuous decay of CO
adsorption during TPD due to contamination by support species.
