Characterization and Electrocatalytic Activity of Nanocomposites Consisting of Nanosized Cobalt Tetraaminophenoxy Phthalocyanine, Multi-walled Carbon Nanotubes and Gold Nanoparticles
Shumba, M; Nyokong, T
| HERO ID | 4386968 |
|---|---|
| In Press | No |
| Year | 2016 |
| Title | Characterization and Electrocatalytic Activity of Nanocomposites Consisting of Nanosized Cobalt Tetraaminophenoxy Phthalocyanine, Multi-walled Carbon Nanotubes and Gold Nanoparticles |
| Authors | Shumba, M; Nyokong, T |
| Journal | Electroanalysis |
| Volume | 28 |
| Issue | 7 |
| Page Numbers | 1478-1488 |
| Abstract | Glassy carbon electrodes were modified with composites containing cobalt tetraaminophenoxy phthalocyanine nanoparticles (CoTAPhPcNP), multi-walled carbon nanotubes (MWCNT) and gold nanorods (AuNRs). The modified electrodes were studied for their electrocatalytic behavior towards the reduction of hydrogen peroxide. Phthalocyanine nanoparticles significantly improved electron transfer kinetics as compared to phthalocyanines which are not in the nanoparticle form when alone or in the presence of multiwalled carbon nanotubes (MWCNTs). CoTAPhPcNP-MWCNT-GCE proved to be suitable for hydrogen peroxide detection with a catalytic rate constant of 3.45 x 10(3) M-1 s(-1) and a detection limit of 1.61 x 10(-7) M. Adsorption Gibbs free energy Delta G degrees was found to be -19.22 kJ mol(-1) for CoTAPhPcNP-MWCNT-GCE. |
| Doi | 10.1002/elan.201501058 |
| Wosid | WOS:000382578400009 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | cobalt tetraaminophenoxy phthalocyanine nanoparticles; gold nanoparticles; multi-walled carbon nanotubes; hydrogen peroxide; electrocatalytic reduction |