One-pot surfactant-free synthesis of porous PtAu alloyed nanoflowers with enhanced electrocatalytic activity for ethanol oxidation and oxygen reduction reactions. (21st January 2016)

• Record Type: Journal Article
• Authors: Song, Pei; Mei, Li-Ping; Wang, Ai-Jun; Fang, Ke-Ming; Feng, Jiu-Ju
• Is Part Of: International journal of hydrogen energy. Volume 41:Number 3(2016)
• Page Start: 1645
• Page End: 1653
• Publication Date: 2016-01-21
• Subjects: Bimetallic nanoflowers -- Methotrexate -- Successive co-reduction approach -- Ethanol oxidation -- Oxygen reduction; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2015.11.021
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Well-defined porous PtAu alloyed nanoflowers (PtAu ANFs) were fabricated by a one-pot surfactant-free successive co-reduction approach. Methotrexate, an antimetabolite and antifolate drug, was employed here as the shape-regulator and stabilizer for the first time, while no any seed, polymer, or surfactant was involved during the synthetic process. The as-prepared architectures were characterized by transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction in details. The as-synthesized hybrid nanocrystals exhibited improved catalytic performances for ethanol oxidation and oxygen reduction in contrast with PtAu-10 NCs, PtAu-50 NPs, and commercial Pt black catalysts, demonstrating their promising applications in fuel cells. Graphical abstract: A facile surfactant-free successive co-reduction approach was developed for synthesis of porous PtAu alloy nanoflowers only with assistance of methotrexate. Highlights: PtAu ANFs were facilely prepared by a one-pot successive co-reduction approach. Methotrexate was served as the shape-regulator and stabilizer. The porous nanocrystals show large electrochemically active surface area. The nanocrystals showed enhanced catalytic performances for EOR and ORR.