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Pt supported on y-A120 3, TiO 2 and ZrO 2 are active catalysts for the CO 2 reforming of methane to synthesis gas. The stability of the catalysts increased in the order Pt/y-A120 3 < Pt/TiO 2 < Pt/ZrO 2. For all catalysts, the decrease in activity with time on stream is caused by carbon formation, which blocks the active metal sites for reaction. With Pt/TiO 2 and Pt/ZrO 2, deactivation started immediately after the start of the reaction, while the Pt/y-A1203 catalyst showed an induction period during which carbon was accumulated without affecting the catalytic activity.

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