Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
45269 | Applied Catalysis B: Environmental | 2016 | 10 Pages |
•Ir/Ce0.9Pr0.1O2 catalysts were prepared by CP, DP and SP techniques.•The locations of Ir species were controlled by the above methods.•The Ir/Ce0.9Pr0.1O2-DP catalyst exhibited the highest performance in DRM.•Ir sintering was avoided by the strong metal-support interaction.•The decrease of DRM performance was assigned to the sintering of mixed oxides.
The metal-support interaction of Ir/Ce0.9Pr0.1O2 catalyst is tuned by adopting different preparation techniques of deposition–precipitation (DP), co-precipitation (CP) and sequential precipitation (SP) to control the locations of Ir, improving catalytic performance in methane dry reforming reaction. Ir/Ce0.9Pr0.1O2-DP catalyst shows the highest catalytic performance and stability due to the unembedded Ir nanoparticles on catalyst surfaces, followed by Ir/Ce0.9Pr0.1O2-SP and Ir/Ce0.9Pr0.1O2-CP catalysts in which Ir species are either partially or fully embedded in Ce-Pr-O mixed oxides. Our results clearly demonstrate that the metal-support interaction plays important roles in controlling the catalyst sintering and carbonaceous deposition.
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