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• W3159831690 endingPage "149926" @default.
• W3159831690 startingPage "149926" @default.
• W3159831690 abstract "The polyethylenimine modified ultrafine palladium nanocrystals on reduced graphene oxide hybrids were synthesized by an adsorption-reduction strategy, which show excellent catalytic activity and stability for hexavalent chromium reduction by formic acid decomposition. • Highly-quality PE@Pd-RGO hybrids are synthesized by a simple adsorption-reduction strategy. • PE molecules effectively serve as complex-forming, linker and functional reagents. • PE@Pd-RGO hybrids show prominent catalytic activity for Cr VI reduction. • The activity enhancement originates from small particle size of Pd nanocrystals and PE functionalization. Palladium-catalytic hydrogenation is an efficient method for remediating inorganic/organic contaminants. Herein, a very simple adsorption-reduction strategy is applied to synthesize the polyethylenimine (PE) modified ultrafine palladium nanocrystals on reduced graphene oxide (RGO) hybrids (PE@Pd-RGO). The surface composition, structure, and morphology of PE@Pd-RGO hybrids are minutely characterized by various physical characterization techniques and the formation mechanism of PE@Pd-RGO hybrids is defined according to experimental observation. Physical characterizations demonstrate that palladium nanocrystals with only 2.91 nm size uniformly anchor at RGO surface and PE modification endows PE@Pd-RGO hybrids with eminent water-solubility. When applied as catalyst for hexavalent chromium reduction, PE@Pd-RGO hybrids reveal excellent catalytic activity (rate constant: 0.0785 min −1 , turnover frequency: 1.166 mol Cr mol Pd −1 min −1 ) and stability due to the small particle size of palladium nanocrystals, excellent colloidal stability, and distinctive electrostatic attraction between PE with –NH 3 + and Cr 2 O 7 2- ion." @default.
• W3159831690 created "2021-05-10" @default.
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• W3159831690 date "2021-09-01" @default.
• W3159831690 modified "2023-10-18" @default.
• W3159831690 title "Polyethylenimine modified ultrafine palladium nanocrystals on reduced graphene oxide for hexavalent chromium reduction" @default.
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• W3159831690 doi "https://doi.org/10.1016/j.apsusc.2021.149926" @default.
• W3159831690 hasPublicationYear "2021" @default.
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