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Abstract
Hydrogenolysis of low-density polyethylene (LDPE) under low pressure of H2 has been accomplished with a Ru−Pt bimetallic alloy catalyst. Using Ru5Pt1/CeO2 (atomic ratio of Ru to Pt is 5:1) as a catalyst, LDPE was efficiently converted (99% conversion) to gas and liquid hydrocarbons under 5 bar of H2 at 200 °C. This is contrastive to the 55% conversion with Ru/CeO2 and <1% conversion with Pt/CeO2 under the same reaction conditions. Mechanistic studies suggested that the higher activity of Ru5Pt1/CeO2 can be attributed to the synergistic effect of Ru (cleavage of C−C bond) and Pt (acceleration of Ru−alkyl hydrogenation step) on the catalyst surface.
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