Abstract
In this paper we report the results of a continuing effort to explore the catalytic properties of these model bimetallic systems. Herein we have conducted catalytic experiments at elevated pressures with an acetylene/hydrogen gas mixture over Pt(111) and ([radical]3 x [radical])R30[degree]-Sn/Pt(111) model catalysts surfaces. Related work on the dimerization and hydrogenolysis reaction chemistry of ethylene/hydrogen mixtures over the same surface is presented in another publication. The changes in activity and selectivity are determined for changes in reaction temperature, reactant partial pressure, and reaction time. All are examined in the context of previous UHV characterization studies and prior batch catalytic reaction chemistry. 46 refs., 11 figs.
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