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Unusual Hollow Al2O3 Nanofibers with Loofah-Like Skins: Intriguing Catalyst Supports for Thermal Stabilization of Pt Nanocrystals
- Fu, Wanlin, Dai, Yunqian, Li, Jerry Pui Ho, Liu, Zebang, Yang, Yong, Sun, Yibai, Huang, Yiyang, Ma, Rongwei, Zhang, Lan, Sun, Yueming
- ACS Applied Materials & Interfaces 2017 v.9 no.25 pp. 21258-21266
- aluminum oxide, catalysts, nanocrystals, nanofibers, p-nitrophenol
- Recently, hollow nanofibers could be fabricated by coaxis electrospinning method or template method. However, they are limited to applications because of the hardship in actual preparation. In this work, hollow γ-Al₂O₃ nanofibers with loofah-like skins were first fabricated by using a single spinneret during electrospinning. These intriguing nanofibers were explored as new Pt supports with excellently sinter-resistant performance up to 500 °C, attributed to the unique loofah-like surface of γ-Al₂O₃ nanofibers and the strong metal–support interactions between Pt and γ-Al₂O₃. When applied in the catalytic reduction of p-nitrophenol, the Pt/γ-Al₂O₃ calcined at 500 °C exhibited 4-times higher reaction rate constant (6.8 s–¹·mg–¹) over free Pt nanocrystals.