Journal
APPLIED SURFACE SCIENCE
Volume 558, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2021.149890
Keywords
Linear carbon chain; Pt nanoparticles; Graphene layers; Catalysts; Oxidation
Categories
Funding
- PON project Bionanotech Research and Innovation Tower (BRIT) - Italian Ministry for Education, University and Research (MIUR)
- Russian Science Foundation [19-72-00001]
- Russian Science Foundation [19-72-00001] Funding Source: Russian Science Foundation
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A two-step laser-assisted synthesis method in water was used to produce Pt@C hybrid structures. Raman and XPS spectroscopies showed the formation of stable Pt@C bonds between Pt NPs and polyynes, preventing oxidation during growth. This Pt@C system could potentially serve as a catalyst for various chemical reactions, with preliminary tests showing promising photocatalytic activities.
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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