Improved l-cysteine electrocatalysis through a sequential drop dry technique using multi-walled carbon nanotubes and cobalt tetraaminophthalocyanine conjugates
Voltammetry, chronoamperometry, scanning electrochemical microscopy and electrochemical impedance spectroscopy methods are used for characterization of a glassy carbon electrode modified with multi-walled carbon nanotubes (MWCNTs)–cobalt tetraaminophthalocyanine (CoTAPc) mixture or sequential drop d...
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| Language: | English |
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Elsevier
2016
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| Online Access: | http://www.sciencedirect.com.access.msu.ac.zw:2048/science/article/pii/S0013468613019622?np=y |
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| author | Nyoni, Stephen Mugadza, Tawanda Nyokong, Tebello |
| author_facet | Nyoni, Stephen Mugadza, Tawanda Nyokong, Tebello |
| author_sort | Nyoni, Stephen |
| collection | DSpace |
| description | Voltammetry, chronoamperometry, scanning electrochemical microscopy and electrochemical impedance spectroscopy methods are used for characterization of a glassy carbon electrode modified with multi-walled carbon nanotubes (MWCNTs)–cobalt tetraaminophthalocyanine (CoTAPc) mixture or sequential drop dry modification technique whereby the MWCNTs are first placed on to the electrode followed by CoTAPc. The sequential drop dry CoTAPc–MWCNTs modified surface gave better catalytic responses with a catalytic rate constant of 2.2 × 105 M−1 s−1, apparent electron transfer rate constant of 0.073 cm s−1, and a limit of detection of 2.8 × 10−7 M. Scanning electrochemical microscopy (SECM) surface characterization (topography and reactivity) further gave proof the better catalytic perfomance of the sequential drop dry CoTAPc–MWCNTs modified surface. |
| format | Article |
| id | ir-11408-1046 |
| institution | My University |
| language | English |
| publishDate | 2016 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | ir-11408-10462022-06-27T13:49:06Z Improved l-cysteine electrocatalysis through a sequential drop dry technique using multi-walled carbon nanotubes and cobalt tetraaminophthalocyanine conjugates Nyoni, Stephen Mugadza, Tawanda Nyokong, Tebello l-Cysteine Cyclic voltammetry Chronoamperometry Scanning electrochemical microscopy Impedance spectroscopy Cobalt tetraaminophthalocyanine Voltammetry, chronoamperometry, scanning electrochemical microscopy and electrochemical impedance spectroscopy methods are used for characterization of a glassy carbon electrode modified with multi-walled carbon nanotubes (MWCNTs)–cobalt tetraaminophthalocyanine (CoTAPc) mixture or sequential drop dry modification technique whereby the MWCNTs are first placed on to the electrode followed by CoTAPc. The sequential drop dry CoTAPc–MWCNTs modified surface gave better catalytic responses with a catalytic rate constant of 2.2 × 105 M−1 s−1, apparent electron transfer rate constant of 0.073 cm s−1, and a limit of detection of 2.8 × 10−7 M. Scanning electrochemical microscopy (SECM) surface characterization (topography and reactivity) further gave proof the better catalytic perfomance of the sequential drop dry CoTAPc–MWCNTs modified surface. 2016-04-26T11:52:59Z 2016-04-26T11:52:59Z 2014 Article 0013-4686 http://www.sciencedirect.com.access.msu.ac.zw:2048/science/article/pii/S0013468613019622?np=y en Electrochimica Acta; open Elsevier |
| spellingShingle | l-Cysteine Cyclic voltammetry Chronoamperometry Scanning electrochemical microscopy Impedance spectroscopy Cobalt tetraaminophthalocyanine Nyoni, Stephen Mugadza, Tawanda Nyokong, Tebello Improved l-cysteine electrocatalysis through a sequential drop dry technique using multi-walled carbon nanotubes and cobalt tetraaminophthalocyanine conjugates |
| title | Improved l-cysteine electrocatalysis through a sequential drop dry technique using multi-walled carbon nanotubes and cobalt tetraaminophthalocyanine conjugates |
| title_full | Improved l-cysteine electrocatalysis through a sequential drop dry technique using multi-walled carbon nanotubes and cobalt tetraaminophthalocyanine conjugates |
| title_fullStr | Improved l-cysteine electrocatalysis through a sequential drop dry technique using multi-walled carbon nanotubes and cobalt tetraaminophthalocyanine conjugates |
| title_full_unstemmed | Improved l-cysteine electrocatalysis through a sequential drop dry technique using multi-walled carbon nanotubes and cobalt tetraaminophthalocyanine conjugates |
| title_short | Improved l-cysteine electrocatalysis through a sequential drop dry technique using multi-walled carbon nanotubes and cobalt tetraaminophthalocyanine conjugates |
| title_sort | improved l-cysteine electrocatalysis through a sequential drop dry technique using multi-walled carbon nanotubes and cobalt tetraaminophthalocyanine conjugates |
| topic | l-Cysteine Cyclic voltammetry Chronoamperometry Scanning electrochemical microscopy Impedance spectroscopy Cobalt tetraaminophthalocyanine |
| url | http://www.sciencedirect.com.access.msu.ac.zw:2048/science/article/pii/S0013468613019622?np=y |
| work_keys_str_mv | AT nyonistephen improvedlcysteineelectrocatalysisthroughasequentialdropdrytechniqueusingmultiwalledcarbonnanotubesandcobalttetraaminophthalocyanineconjugates AT mugadzatawanda improvedlcysteineelectrocatalysisthroughasequentialdropdrytechniqueusingmultiwalledcarbonnanotubesandcobalttetraaminophthalocyanineconjugates AT nyokongtebello improvedlcysteineelectrocatalysisthroughasequentialdropdrytechniqueusingmultiwalledcarbonnanotubesandcobalttetraaminophthalocyanineconjugates |