Ventura, Michele
(2016)
Deposizione elettrochimica di esacianoferrato di rame tramite un metodo "a due step"; caratterizzazione e valutazione delle prestazioni.
[Laurea magistrale], Università di Bologna, Corso di Studio in
Chimica industriale [LM-DM270]
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Abstract
In this thesis we have identified two electrochemical procedures for preparing two compounds of copper hexacyanoferrate (CuHCF) films with different compositions and structures. The deposition were carried out using a “two steps” method consisting in electrochemical
oxidation of previously deposited metallic copper on carbon substrates (glassy carbon and graphite foil electrodes) in K3[Fe(CN)6] solution. Both films, CuHCF-methodA
and CuHCF-methodB, were characterized by cyclic voltammetry (GC) and their study using XANES spectroscopy revealed evidence of different structures. Additionally, insertion and extraction of different cations (Na+, K+, Mg2+, Al3+ and Cs+) were performed and the results indicate that CuHCF-methodA has slightly better performances and operational stability than CuHCF-methodB. Data from galvanostatic charge-discharge tests confirme the latter observation. An application for amperometric detection of H2O2 and SEM micrographs are also reported for both films (method A and B). Comparing these results with a previous work of our research group, seems that the deposition of two different compounds using methodA and methodB is due to the different stoichiometry of ions Cu2+ e [Fe(CN)6]3– created near electrode surface during the dissolution step.
Abstract
In this thesis we have identified two electrochemical procedures for preparing two compounds of copper hexacyanoferrate (CuHCF) films with different compositions and structures. The deposition were carried out using a “two steps” method consisting in electrochemical
oxidation of previously deposited metallic copper on carbon substrates (glassy carbon and graphite foil electrodes) in K3[Fe(CN)6] solution. Both films, CuHCF-methodA
and CuHCF-methodB, were characterized by cyclic voltammetry (GC) and their study using XANES spectroscopy revealed evidence of different structures. Additionally, insertion and extraction of different cations (Na+, K+, Mg2+, Al3+ and Cs+) were performed and the results indicate that CuHCF-methodA has slightly better performances and operational stability than CuHCF-methodB. Data from galvanostatic charge-discharge tests confirme the latter observation. An application for amperometric detection of H2O2 and SEM micrographs are also reported for both films (method A and B). Comparing these results with a previous work of our research group, seems that the deposition of two different compounds using methodA and methodB is due to the different stoichiometry of ions Cu2+ e [Fe(CN)6]3– created near electrode surface during the dissolution step.
Tipologia del documento
Tesi di laurea
(Laurea magistrale)
Autore della tesi
Ventura, Michele
Relatore della tesi
Scuola
Corso di studio
Parole chiave
copper hexacyanoferrate electrodeposition XANES spectroscopy
Data di discussione della Tesi
22 Marzo 2016
URI
Altri metadati
Tipologia del documento
Tesi di laurea
(NON SPECIFICATO)
Autore della tesi
Ventura, Michele
Relatore della tesi
Scuola
Corso di studio
Parole chiave
copper hexacyanoferrate electrodeposition XANES spectroscopy
Data di discussione della Tesi
22 Marzo 2016
URI
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