Size controlled PtNi@SiO2 core-shell nanoparticles were synthesized by a sol-gel method. The Pt-NiO@SiO2 mesoporous core-shell nanocatalysts were obtained by calcinations of PtNi@SiO2 nanoparticles at 500 oC. The characterization results reveal that the Pt-NiO@SiO2 nanocatalysts consist of Pt-NiO heteroaggregate nanoparticle cores and mesoporous SiO2 shells. The Pt-NiO@SiO2 nanocatalysts illustrate a superior catalytic performance for functional group substituted nitrobenzene hydrogenation relative to Pt@SiO2 and PtNi@SiO2 control catalysts. The catalytic enhancement for functional group substituted nitrobenzene hydrogenation is ascribed to the strong Pt-NiO interaction, which could obtain sufficient highly active H species and thus result in enhanced catalytic performance.

Enhanced catalytic hydrogenation performance over size-controlled Pt-NiO@SiO2 mesoporous core-shell nanocatalysts

249th National Meeting (2015)

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