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Induction of titanium reduction using pyrrole and polypyrrole in the ionic liquid ethyl-methyl-imidazolium bis(trifluoromethanesulphonyl)amide

Journal Article


Abstract


  • The electrowinning of titanium currently involves high temperature processing and quite extreme condition. As part of a project investigating

    the use of ionic liquids to refine titanium, we have investigated the use of a polymeric nucleating agent to assist the electro-deposition

    of the metal. Initial attempts focussed on polypyrrole coatings on the working electrode. These were unsuccessful due to the low

    conductivity of the conducting polymer in the IL at the reductive potentials required to deposit the titanium. However, it was found that

    pyrrole was a very successful additive able to induce deposition of titanium species from a TiCl4 containing ionic liquid electrolyte

    ([emim][Ntf2]). Well characterised titanium containing polypyrrole co-deposits have been achieved, when pyrrole was introduced, however

    bulk metallic titanium was not observed. The presence of titanium species in these deposits was confirmed by XPS. It is thought that

    the growing pyrrole oligomers form nucleation sites either in situ at the electrodeliquid interface or as a thin film on the electrode allowing

    co-precipitation of reduced Ti species from solution.

Publication Date


  • 2008

Citation


  • Ding, J., Wu, J., MacFarlane, D., Price, W. E. & Wallace, G. (2008). Induction of titanium reduction using pyrrole and polypyrrole in the ionic liquid ethyl-methyl-imidazolium bis(trifluoromethanesulphonyl)amide. Electrochemistry Communications, 10 217-221.

Scopus Eid


  • 2-s2.0-38649119767

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/3322

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 217

End Page


  • 221

Volume


  • 10

Abstract


  • The electrowinning of titanium currently involves high temperature processing and quite extreme condition. As part of a project investigating

    the use of ionic liquids to refine titanium, we have investigated the use of a polymeric nucleating agent to assist the electro-deposition

    of the metal. Initial attempts focussed on polypyrrole coatings on the working electrode. These were unsuccessful due to the low

    conductivity of the conducting polymer in the IL at the reductive potentials required to deposit the titanium. However, it was found that

    pyrrole was a very successful additive able to induce deposition of titanium species from a TiCl4 containing ionic liquid electrolyte

    ([emim][Ntf2]). Well characterised titanium containing polypyrrole co-deposits have been achieved, when pyrrole was introduced, however

    bulk metallic titanium was not observed. The presence of titanium species in these deposits was confirmed by XPS. It is thought that

    the growing pyrrole oligomers form nucleation sites either in situ at the electrodeliquid interface or as a thin film on the electrode allowing

    co-precipitation of reduced Ti species from solution.

Publication Date


  • 2008

Citation


  • Ding, J., Wu, J., MacFarlane, D., Price, W. E. & Wallace, G. (2008). Induction of titanium reduction using pyrrole and polypyrrole in the ionic liquid ethyl-methyl-imidazolium bis(trifluoromethanesulphonyl)amide. Electrochemistry Communications, 10 217-221.

Scopus Eid


  • 2-s2.0-38649119767

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/3322

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 217

End Page


  • 221

Volume


  • 10