STUDIES ON PTXINY BIMETALLICS IN NAY .2. FURTHER CHARACTERIZATION RESULTS AND CATALYTIC PROPERTIES

In a previous paper the preparation and the characterization of PtNaY and PtInNaY were reported. Here, complementary characterization result s obtained by studying the TPD of CO by mass spectrometry coupled with IR studies of the adsorbed CO phases indicated no apparent change in the electronic properties of Pt. Comparison of catalytic properties fo r n-butane hydrogenolysis between PtNaY and PtInNaY indicated that the hydrogenolysis is deeply affected by the addition of In to Pt; the ki netic parameters (apparent activation energy, relative order for butan e and for hydrogen) are modified by In addition. These results are exp lained considering that In is acting more like a diluent of Pt atoms t han as an electronic modifier of Pt. (C) 1996 Academic Press, Inc.