Nb electrodissolution in aqueous alkali: dependence on the alkali metal (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Nb electrodissolution in aqueous alkali: dependence on the alkali metal (Articolo in rivista) (literal)

Anno

• 2003-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1016/S0022-0728(03)00108-6 (literal)

Alternative label

• Baruffaldi C., Bertoncello R., Cattarin S., Guerriero P., Musiani M. (2003)
  Nb electrodissolution in aqueous alkali: dependence on the alkali metal
  in Journal of electroanalytical chemistry (1992)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Baruffaldi C., Bertoncello R., Cattarin S., Guerriero P., Musiani M. (literal)

Pagina inizio

• 65 (literal)

Pagina fine

• 72 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

• http://www.sciencedirect.com/science/article/pii/S0022072803001086 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 545 (literal)

Rivista

• Journal of electroanalytical chemistry (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

• 8 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto

• Nb electrodissolution is studied in solutions of alkali metal hydroxides MOH (M = Li, Na, K, Rb, Cs). The j-E curves show in all cases a dissolution/passivation peak followed by a current plateau. The current shows a marked dependence on the cation M: the peak current jpk goes through a maximum for M = K, the plateau current jpl increases monotonically with the atomic number of M. Electrochemical Impedance Spectroscopy indicates that in the plateau region a similar barrier oxide is present over the metal substrate in all the solutions. XPS analyses show that polarisation causes, in certain cases, formation of a porous film of alkali metal niobates or mixed oxides, probably by a mechanism of dissolution/precipitation. It is proposed that the peak current is controlled by both the solution basicity and the solubility of this layer, whereas the dependence of the plateau current on M reflects the variations in solutions basicity and in the specific ability of the metal cations to promote dissolution of the barrier oxide. (literal)

Note

• ISI Web of Science (WOS) (literal)
• Scopu (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• 1,3,5 : IENI - CNR, Corso Stati Uniti, 4 35127 Padova Italia 2 : Dipartimento CIMA - Consorzio INSTM, Università di Padova, 35131 Padova Italia 4 : ICIS - CNR, Corso Stati Uniti, 4 35127 Padova Italia (literal)

Titolo

• Nb electrodissolution in aqueous alkali: dependence on the alkali metal (literal)

Abstract

• Nb electrodissolution is studied in solutions of alkali metal hydroxides MOH (M=Li, Na, K, Rb and Cs). The j– E curves show in all cases a dissolution/passivation peak followed by a current plateau. The current shows a marked dependence on the cation M: the peak current density jpk goes through a maximum for M=K and the plateau current density jpl increases monotonically with the atomic number of M. Electrochemical impedance spectroscopy indicates that in the plateau region, a similar barrier oxide is present over the metal substrate in all solutions. XPS analyses show that polarisation causes, in certain cases, formation of a porous film of alkali metal niobates or mixed oxides, probably by a mechanism of dissolution/precipitation. It is proposed that the peak current is controlled by both the solution basicity and the solubility of this layer, whereas the dependence of the plateau current on M reflects the variations in solution basicity and in the specific ability of the metal cations to promote dissolution of the barrier oxide. (literal)

Prodotto di

• Institute of Condensed Matter Chemistry and Energy Technologies (ICMATE) (Istituto)
• Istituto di chimica inorganica e delle superfici (ICIS) (Istituto)

Autore CNR

• PAOLO GUERRIERO (Unità di personale interno)
• MARCO MUSIANI (Persona)
• SANDRO CATTARIN (Unità di personale interno)

Insieme di parole chiave

• Parole chiave di "Nb electrodissolution in aqueous alkali: dependence on the alkali metal" (Insieme di parole chiave)

Incoming links:

Prodotto

• Istituto di chimica inorganica e delle superfici (ICIS) (Istituto)
• Institute of Condensed Matter Chemistry and Energy Technologies (ICMATE) (Istituto)

Autore CNR di

• PAOLO GUERRIERO (Unità di personale interno)
• MARCO MUSIANI (Persona)
• SANDRO CATTARIN (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Journal of electroanalytical chemistry (Rivista)

Insieme di parole chiave di

• Parole chiave di "Nb electrodissolution in aqueous alkali: dependence on the alkali metal" (Insieme di parole chiave)