Bimetallic reforming Pt-Re catalysts were prepared either by coimpregnation or by a surface redox reaction (catalytic reduction); this last technique allowing improvement of the Pt-Re interaction. Bimetallic catalysts prepared by catalytic reduction and activated by direct reduction are less sensitive than coimpregnated ones to hydrogen sulfide adsorption at 500 degrees C, The coking reaction was studied in the course of cyclopentane transformation at 450 degrees C. For non-sulfided catalysts, the deposition of coke and its fouling effect for the metallic function decrease as the Pt-Re interaction increases whatever the working pressure. After sulfidation, the deactivation of bimetallic catalysts by carbon deposition depends on both the Pt-Re interaction and the working pressure. At normal pressure, the toxicity of coke increases with the degree of Pt-Re interaction while the reverse effect is observed at high pressure (15 bar).