0000000000219137

AUTHOR

E. Adragna

showing 2 related works from this author

Identification of passive layers on Co in Alkaline solutions by photocurrent spectroscopy

2005

The photoelectrochemical behavior of passive films on Co has been studied as a function of the polarizing voltage and electrolyte composition. Passive layers formed at 0 V (standard hydrogen electrode, SHE) in 0.1 M NaOH consisted of Co(OH) 2 , whose bandgap value has been found to be 1.85 eV. Higher bandgap values (2.75 eV) have been measured for passive films formed in borate buffer at 0 V (SHE), which are mainly consist of CoO. The Eg values have been related to the film composition on the basis of a correlation between the bandgap of passive films and the electronegativity of their constituents.

BORATE BUFFER SOLUTION; SEMICONDUCTIVE PROPERTIES; FILM;PhotocurrentMaterials scienceStandard hydrogen electrodeSEMICONDUCTIVE PROPERTIESBand gapGeneral Chemical EngineeringAnalytical chemistryBORATE BUFFER SOLUTIONElectronegativitySettore ING-IND/23 - Chimica Fisica ApplicataBORATE BUFFERElectrochemistryGeneral Materials ScienceElectrical and Electronic EngineeringPhysical and Theoretical ChemistrySpectroscopyElectrolyte compositionFILM
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Photoelectrochemical behaviour of passive layers on Co in alkaline solutions

2004

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