0000000000807107

AUTHOR

E. Rinaldo

showing 2 related works from this author

Formation of lead by reduction of electrodeposited PbO2: comparison between bulk films and nanowires fabrication

2012

Metallic lead was deposited, both in form of bulk films and nanowire array within pores of anodic alumina membranes, following a new two-step procedure, consisting in anodic electrodeposition of α-PbO2, followed by its reduction to metallic lead. This method allows to overcome drawbacks of the “direct” electrodeposition of lead from aqueous solution, consisting, essentially, in the formation of dendritic deposits. Here, we report the comparison between results obtained in the two cases and discuss the kinetic of oxide reduction both for films and nanowires. Deposit morphology and structure are also discussed. We have found that reduction of α-PbO2 films proceeds always at high speed and uni…

FabricationMaterials scienceAqueous solutionMetallurgyOxideNanowireCondensed Matter PhysicsElectrochemistryAnodeMetalchemistry.chemical_compoundSettore ING-IND/23 - Chimica Fisica ApplicatachemistryChemical engineeringvisual_artElectrochemistryvisual_art.visual_art_mediumGeneral Materials ScienceCrystallitelead oxide lead nanostructures film electrodepositionElectrical and Electronic Engineering
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Lead Nanowires for Microaccumulators Obtained Through Indirect Electrochemical Template Deposition

2010

Metallic lead nanowires were deposited within pores of commercial anodic alumina membranes having an average pore diameter of 210 nm. "Direct" electrodeposition was attempted from 0.1 M Pb(NO 3 ) 2 aqueous solution with a variable concentration of H 3 BO 3 as a chelating agent, but it gave unsatisfactory results. An "indirect" two-step deposition procedure was then adopted, consisting of the anodic electrodeposition of α-PbO 2 nanowires, followed by their in situ reduction to metallic lead. Both these processes occurred at a high rate so that the indirect method led to a complete template pore filling with pure polycrystalline Pb in short times and with a high current efficiency.

In situAqueous solutionMaterials scienceGeneral Chemical EngineeringNanowireNanotechnologyElectrochemistryAnodeLead Nanowires; Lead-acid Batteries; Template Synthesis; Electrodeposition; Anodic Alumina MembranesSettore ING-IND/23 - Chimica Fisica ApplicataElectrodepositionChemical engineeringLead-acid BatterieTemplate SynthesiLead NanowireElectrochemistryGeneral Materials ScienceChelationCrystalliteElectrical and Electronic EngineeringPhysical and Theoretical ChemistryAnodic Alumina MembranesDeposition (law)
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