Catalytic enhancement on nanowire-engineered thermally stable oxide-metal inverse catalysts

초록

The interface between metal and oxide plays a critical role in heterogeneous catalysis. In this study, we fabricated model inverse catalysts by transferring oxide nanowire assemblies of Co3O4, CeO2, and TiO2 onto Pt films to construct structurally well-defined oxide-metal interfaces. The deposited oxide nanowires retained their morphology without noticeable diffusion or sintering during annealing and carbon monoxide oxidation, as confirmed by near-edge X-ray absorption fine structure analysis. The surface electronic structure and morphology of the Pt film also remained largely unchanged, preserving the oxide-metal interfaces, which exhibited significant enhancements in turnover frequencies, depending on the oxide composition. These results highlight the utility of oxide nanowires in constructing thermally stable and composition-tunable oxide-metal interfaces for catalytic systems.

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