Unusual Hollow Al 2 O 3 Nanofibers with Loofah-Like Skins: Intriguing Catalyst Supports for Thermal Stabilization of Pt Nanocrystals.

Authors :: Fu W
Dai Y
Li JPH
Liu Z
Yang Y
Sun Y
Huang Y
Ma R
Zhang L
Sun Y
Source :: ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2017 Jun 28; Vol. 9 (25), pp. 21258-21266. Date of Electronic Publication: 2017 Jun 15.
Publication Year :: 2017
Abstract: 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-Al <subscript>2</subscript> O <subscript>3</subscript> 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-Al <subscript>2</subscript> O <subscript>3</subscript> nanofibers and the strong metal-support interactions between Pt and γ-Al <subscript>2</subscript> O <subscript>3</subscript> . When applied in the catalytic reduction of p-nitrophenol, the Pt/γ-Al <subscript>2</subscript> O <subscript>3</subscript> calcined at 500 °C exhibited 4-times higher reaction rate constant (6.8 s <superscript>-1</superscript> ·mg <superscript>-1</superscript> ) over free Pt nanocrystals.

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