Noble metal-free oxidative electrocatalysts: Polyaniline and Co(II)-polyaniline nanostructures hosted in nanoporous silica

Rafael Silva, Tewodros Asefa

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

An efficient nanocomposite electrocatalyst composed of mesoporous silica (SBA-15) with polyaniline (PANI) nanostructures within its channel pores (PANI/SBA-15) is synthesized and characterized. The resulting PANI/SBA-15 is capable of chelating Co(II) ions, presumably via its nitrogen atoms on PANI/diamine groups. Both the metal-free (SBA-15/PANI) and the Co(II)-doped SBA-15/PANI nanocomposite materials showed high electrocatalytic activity for oxidation of L-ascorbic acid, with very low overpotential and high current density. The activity of PANI/SBA-15 toward oxidation of L-ascorbic acid is comparable to that obtained from a conventional Pt/C electrocatalyst.

Original languageEnglish
Pages (from-to)1878-1883
Number of pages6
JournalAdvanced Materials
Volume24
Issue number14
DOIs
Publication statusPublished - Apr 10 2012

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Keywords

  • Co(II)-polyaniline
  • L-ascorbic acid
  • eletrocatalyst
  • mesoporous silica
  • oxidation
  • polyaniline

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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