The Catalytic Role Of Platinum Nanoparticles In Laser Generated Nanocarbons

APPLIED SURFACE SCIENCE(2021)

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摘要
A two step laser-assisted synthesis method in water was employed to produce Pt@C hybrid structures. The structure and chemical composition of the produced Pt@C species were studied by Raman and X-ray photoelectron (XPS) spectroscopies. Raman analysis clearly evidences the formation of two different regions, one dominated by Pt nanoparticles (Pt NPs) surrounded by linear carbon chains and another where Pt-catalysed graphene-like foils take over. The high-energy resolved XPS Pt 4f and C 1s spectra show that the interaction of Pt NPs with polyynes give rise to the formation of strong Pt@C bonds, preventing the oxidation of the nanoparticles during their growth. The produced Pt@C systems could be proposed as catalysts towards several chemical reactions and preliminary tests using Methylene blue as probe molecules to evaluate the photocatalytic activities of Pt NPs and Pt@LCC nanostructures are reported.
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关键词
Linear carbon chain, Pt nanoparticles, Graphene layers, Catalysts, Oxidation
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