Abstract
Alkali nitrates (lithium, sodium, potassium, caesium) are added to a Pd n+ /SiO 2 precursor. After reduction under hydrogen the addition leads to a moderate increase in the metallic particle size but to drastic changes in the infrared spectrum of carbon monoxide adsorbed on palladium. A direct interaction between the alkaline ion and carbon monoxide bonded to palladium is invoked. The extent of the interaction increases with the reduction temperature. The particular behaviour of lithium-doped solids is discussed.
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