Benefiting from the structural anisotropy and preferential exposure of low energy facets, 1-dimensional (1-D) nanowires (NWs) have emerged as a promising class of materials in the field of catalysis. We have been working on the synthetic control of Pt-based NWs. Through the rational tailoring of these NWs, they can be used as active catalysts for oxygen reduction reaction (ORR) and for CO oxidation. We successfully constructed catalytic active hierarchical interfaces in these 1-D materials, exemplified by the synthesis of TiO2-supported PtFe–FeOx nanowires (NWs). The hierarchical interface, constituting atomic level interactions between PtFe and FeOx within each NW and the interactions between NWs and support (TiO2), enables CO oxidation with 100% conversion at room temperature. The role of the two interfaces were investigated by probing the CO oxidation reaction with isotopic labeling experiments. The special structure also offers an attractive catalyst model to study electronic and strain effects for tuning catalysis of nanostructure.

Synthetic tailoring of Pt-based nanowires for enhanced catalysis

251st National Meeting (2016)

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