Abstract
0.5%Pt-0.5%Ru/2%Ce/(θ + α)-Al 2O 3, reduced by H 2 at 1173 K, presents a mixture of Pt and Ru (3–30 nm) nanoparticles in reduced and partially oxidised condition surrounded by larger formations of surface compound CeAlO 3 with perovskite structure and oxide Ce 6O 11 (15–80 nm). High conversion of CH 4 and selectivity for CO and H 2 (close to 100%) at short contact times (2.35–8 × 10 −3 s) are observed by using that catalyst in catalytic partial oxidation of CH 4 to synthesis-gas at 1173 K and atmospheric pressure. Methane is activated on Pt and Ru metal clusters while oxygen is activated on Ce oxide nanostructures.
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