Abstract
The application of static secondary ion mass spectrometry (SSIMS) to the surface investigation of small supported palladium particles is described. The method is applied within the frame of a catalytic reaction study (CO oxidation). The secondary ion yields are measured during CO adsorption and desorption. It is shown that it is possible to identify two states of CO bonding and to make quantitative measurements of adsorbed amounts in relation to previous thermal desorption results. The effects of heating treatments in CO + O 2 mixtures are investigated for various particle sizes.
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