Effect of mass transport on Si electrodissolution in aqueous hydrazine (Articolo in rivista)

Type
Label
  • Effect of mass transport on Si electrodissolution in aqueous hydrazine (Articolo in rivista) (literal)
Anno
  • 2002-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1149/1.1424897 (literal)
Alternative label
  • Cattarin S., Musiani M., Tribollet B. (2002)
    Effect of mass transport on Si electrodissolution in aqueous hydrazine
    in Journal of the Electrochemical Society
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Cattarin S., Musiani M., Tribollet B. (literal)
Pagina inizio
  • C37 (literal)
Pagina fine
  • C43 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://jes.ecsdl.org/content/149/1/C37 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 149 (literal)
Rivista
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  • 7 (literal)
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1,2 : CNR, IPELP, I-35127 Padua, Italy 3 : Univ Paris 06, CNRS, UPR 15, F-75252 Paris 05, France (literal)
Titolo
  • Effect of mass transport on Si electrodissolution in aqueous hydrazine (literal)
Abstract
  • The anodic dissolution and passivation of Si in aqueous hydrazine have been studied, with special emphasis on the effects of hydrodynamic conditions, by using a submerged impinging jet cell. Experiments, performed in the temperature range 20-50°C, show an anomalous current decrease on increasing mass-transfer rate, more pronounced at lower temperatures and observed both in the presence and in the absence of dissolved oxygen. It is shown that data may be interpreted by a mechanism similar to that previously proposed for Si dissolution in NaOH. As a result of electrode processes and of the electroneutrality constraints in a binary electrolyte, the equal surface concentrations of the two ionic species, OH- and N2H5+, increase above the bulk value; one of these species, most probably OH-, has a catalytic action on the dissolution steps and its local buildup promotes a larger current; increased mass transport, by reducing the surface concentration excess, reduces the current. The model explains the main experimental data, including the marked decrease of the mass-transport effect upon addition to the solution of significant concentrations of either NaOH or NaCl. (literal)
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