Palladium surfaces, pretreated with a solution of 2,2′-bipyridine (bpy) as ligand molecule, were SERS-activated by means of laser-ablated Ag colloidal nanoparticles. XPS and Raman measurements, along with DFT simulations, evidenced the species formed on the metal surface as bpy-Pd(OH) 2 , which appears quite similar, from both structural and spectroscopic points of view, to the bpy-PdCl 2 coordination compound, whose catalytic activity is well known. Based on these observations, the use of Pd substrates coated with bpy is proposed for reactions of heterogeneous catalysis, instead of using bpy-PdCl 2 as homogeneous catalyst. Moreover, palladium nanoparticles could be prepared by laser ablation in aqueous solution of bpy, exhibiting both colloidal stability and catalytic activity.

SERS, XPS and DFT investigation on palladium surfaces coated with 2,2′-bipyridine monolayers / Muniz-Miranda, Maurizio; Muniz-Miranda, Francesco; Caporali, Stefano; Calisi, Nicola; Pedone, Alfonso. - In: APPLIED SURFACE SCIENCE. - ISSN 0169-4332. - 457:(2018), pp. 98-103. [10.1016/j.apsusc.2018.06.232]

SERS, XPS and DFT investigation on palladium surfaces coated with 2,2′-bipyridine monolayers

Muniz-Miranda, Francesco;Pedone, Alfonso
2018

Abstract

Palladium surfaces, pretreated with a solution of 2,2′-bipyridine (bpy) as ligand molecule, were SERS-activated by means of laser-ablated Ag colloidal nanoparticles. XPS and Raman measurements, along with DFT simulations, evidenced the species formed on the metal surface as bpy-Pd(OH) 2 , which appears quite similar, from both structural and spectroscopic points of view, to the bpy-PdCl 2 coordination compound, whose catalytic activity is well known. Based on these observations, the use of Pd substrates coated with bpy is proposed for reactions of heterogeneous catalysis, instead of using bpy-PdCl 2 as homogeneous catalyst. Moreover, palladium nanoparticles could be prepared by laser ablation in aqueous solution of bpy, exhibiting both colloidal stability and catalytic activity.
2018
457
98
103
SERS, XPS and DFT investigation on palladium surfaces coated with 2,2′-bipyridine monolayers / Muniz-Miranda, Maurizio; Muniz-Miranda, Francesco; Caporali, Stefano; Calisi, Nicola; Pedone, Alfonso. - In: APPLIED SURFACE SCIENCE. - ISSN 0169-4332. - 457:(2018), pp. 98-103. [10.1016/j.apsusc.2018.06.232]
Muniz-Miranda, Maurizio; Muniz-Miranda, Francesco; Caporali, Stefano; Calisi, Nicola; Pedone, Alfonso
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1171942
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