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 language | English |
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Pages (from-to) | 1878-1883 |
Number of pages | 6 |
Journal | Advanced Materials |
Volume | 24 |
Issue number | 14 |
DOIs | |
Publication status | Published - Apr 10 2012 |
Keywords
- Co(II)-polyaniline
- L-ascorbic acid
- eletrocatalyst
- mesoporous silica
- oxidation
- polyaniline
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering