Effect of Pd/C dispersion on its catalytic properties in acetylene and vinylacetylene hydrogenation (original) (raw)

In reactions of the selective hydrogenation of acetylene and vinylacetylene, the specific catalytic activity (turnover number, TON) and selectivity of Pd obtained_via reduction of C,H,PdC,H, anchored on active carbon, within a particle-size range of 30-110 A, is roughly constant and close to the TON of Pd over oxide supports (SiOz, A&O,). The binding energy of the Pd 3d,,, level of a low-dispersed Pd does not depend significantoly on its particle size and the nature of the support. The TON of Pd/C containing particles < 30 A is several times lower than that of low-dispersed Pd.

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