Abstract
The catalytic reactions between but-1-ene and deuterium on five Pd-Ni alloy catalysts supported on silica were investigated at 23 and −85 °C and compared to supported palladium and nickel catalysts. The hyperfine distribution of monodeuterated but-1-ene was shown to be a specific property of the metals: on palladium the primary vinylic hydrogen atoms are mainly exchanged with deuterium while on nickel the secondary vinylic hydrogen is involved in a proportion of more than 80%. In the alloys, down to 10 atom% palladium concentration, the catalytic properties of palladium are observed; the catalytic behavior of nickel is observed only with a 4 atom% palladium alloy. A surface study with AES and XPS, respectively, on a bulk and supported 4 atom% palladium alloy showed that the palladium surface concentration was near 50%, which is consistent with the catalytic results.
Published Version
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