0000000000704785

AUTHOR

Andrea Lazzarini

0000-0002-0404-6597

showing 3 related works from this author

Formation and growth of palladium nanoparticles inside porous poly(4-vinyl-pyridine) monitored by operando techniques: The role of different reducing…

2017

In this work we followed the formation of palladium nanoparticles, starting from palladium (II) acetate precursor, inside a poly(4-vinylpyridine-co-divinylbenzene) polymer in presence of different reducing agents. The formation and growth of palladium nanoparticles in presence of H-2 was followed as a function of temperature by simultaneous XANES-SAXS techniques, coupled with DRIFT spectroscopy in operando conditions. It was found that the pyridyl functional groups in the polymer plays a fundamental role in the stabilization of the palladium (II) acetate precursor, as well as in the stabilization of the palladium nanoparticles. The effect of a thermal treatment in alcohol (ethanol and 2-pro…

inorganic chemicalsReducing agentInfrared spectroscopychemistry.chemical_element02 engineering and technologyThermal treatment010402 general chemistryPhotochemistry01 natural sciencesAEROBIC ALCOHOL OXIDATIONCatalysisCatalysiCatalysisP4VPRUTHENIUM NANOPARTICLESMoleculeOrganic chemistryOperandoCATALYTIC-ACTIVITYchemistry.chemical_classificationPD NANOPARTICLESDRIFT; Operando; P4VP; Palladium nanoparticles; SAXS; XANESChemistryIN-SITUChemistry (all)SAXSGeneral ChemistryPolymerPalladium nanoparticleSELECTIVE OXIDATION021001 nanoscience & nanotechnologyPalladium nanoparticlesXANESX-RAY-SCATTERINGPARTICLE-SIZE0104 chemical sciencesDRIFTColloidal goldGOLD NANOPARTICLESVIBRATIONAL PROPERTIESDRIFT; Operando; P4VP; Palladium nanoparticles; SAXS; XANES; Catalysis; Chemistry (all)0210 nano-technologyPalladiumCatalysis Today
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The Pyridyl Functional Groups Guide the Formation of Pd Nanoparticles Inside A Porous Poly(4-Vinyl-Pyridine)

2015

The reactivity of palladium acetate inside a poly(4-vinylpyridine-co-divinylbenzene) polymer is strongly influenced by the establishment of interaction between the Pd precursor and the pyridyl functional group in the polymer. Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and simultaneous X-ray absorption near edge structure (XANES) and small angle X-ray scattering (SAXS) techniques have been applied to monitor the reactivity of palladium acetate in the presence of H-2 and CO as a function of temperature. H-2 reduces palladium acetate to Pd nanoparticles and acetic acid. The pyridyl groups in the polymer play a vital role both in stabilizing the formed acetic acid, thu…

INFRARED-SPECTRADiffuse reflectance infrared fourier transformpolymersmall angle X-ray scatteringInfrared spectroscopychemistry.chemical_elementPALLADIUM(II) ACETATEIR spectroscopy; nanoparticles; palladium; polymers; small angle X-ray scattering; X-ray absorption spectroscopyPhotochemistryCatalysisCatalysisInorganic ChemistryAcetic acidchemistry.chemical_compoundRUTHENIUM NANOPARTICLESPARTICLE FORMATIONENVIRONMENTALLY BENIGNReactivity (chemistry)Physical and Theoretical ChemistryCARBON-MONOXIDEpolymerschemistry.chemical_classificationPOLYMERIC SUPPORTSnanoparticleIN-SITUOrganic ChemistryIR spectroscopy; nanoparticles; palladium; polymers; small angle X-ray scattering; X-ray absorption spectroscopy; Inorganic Chemistry; Organic Chemistry; Physical and Theoretical Chemistry; CatalysisX-ray absorption spectroscopyPolymerpalladiumchemistryIR spectroscopynanoparticlesPalladium(II) acetateTRANSITION-METAL COORDINATIONRESOLVED SAXS ANALYSISPalladium
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Pd nanoparticles formation inside porous polymeric scaffolds followed by in situ XANES/SAXS

2015

International audience; Simultaneous time-resolved SAXS and XANES techniques were employed to follow in situ the formation of Pd nanoparticles from palladium acetate precursor in two porous polymeric supports: polystyrene (PS) and poly(4-vinyl-pyridine) (P4VP). In this study we have investigated the effect of the use of different reducing agents (H-2 and CO) from the gas phase. These results, in conjunction with data obtained by diffuse reflectance IR (DRIFT) spectroscopy and TEM measurements, allowed us to unravel the different roles played by gaseous H-2 and CO in the formation of the Pd nanoparticles for both PS and P4VP hosting scaffolds

HistoryMaterials scienceAbsorption spectroscopyNanoparticlechemistry.chemical_elementreduction02 engineering and technologypolystyrene010402 general chemistry01 natural sciencesEducationP4VPchemistry.chemical_compoundPdPd nanoparticles formation inside porous polymeric scaffoldspaladumchemistry.chemical_classification[PHYS]Physics [physics]Small-angle X-ray scatteringnanoparticlein situSAXS XANES Pd paladum nanoparticle polystyrene P4VP DRIFT TEM reduction in situSAXSPolymer021001 nanoscience & nanotechnologyXANESXANES0104 chemical sciencesComputer Science ApplicationsCrystallographyDRIFTchemistryChemical engineeringTEMPolystyreneDiffuse reflection0210 nano-technologyPalladium
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