Abstract :
The adsorption of carbon monoxide on small alumina-supported Pd particles have been studied by X-ray photoelectron
spectroscopy XPS.. The results showed clearly different surface properties of bulk metal and supported clusters. The effect
of partial CO dissociation was observed on Pd deposited on g-alumina and on clean aluminium, but not on small Pd particles
prepared on thin amorphous oxide film on Al substrate. CO–Pd interaction was determined from C 1s photoelectron spectra
that exhibited two CO-related components. The dissociation activity was monitored as a rise of C 1s signal at 285 eV, while
the molecularly adsorbed CO exhibited the intensity at 287 eV. The study showed that beside the particle size, the
metal–substrate interaction MSI.plays an important role in CO–Pd adsorption process. q2000 Elsevier Science B.V. All
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Keywords :
Surface reaction , adsorption , Palladium clusters , carbon monoxide , alumina , Aluminium , oxide , X-ray photoelectron spectroscopy XPS. , Dissociation , Metal–substrate interaction
