- Title
- Electrocatalytic properties of vitamin B12 towards oxidation and reduction of nitric oxide
- Creator
- Vilakazi, Sibulelo Lea
- Creator
- Nyokong, Tebello
- Subject
- To be catalogued
- Date Issued
- 2000
- Date
- 2000
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/293196
- Identifier
- vital:57064
- Identifier
- xlink:href="https://doi.org/10.1016/S0013-4686(00)00628-9"
- Description
- This paper reports on the catalytic behaviour of cyanocobalamin (VB12) towards the reduction and oxidation of nitric oxide. When VB12 is adsorbed on glassy carbon electrodes, it catalyses the reduction of nitric oxide (NO) in pH 4 and 9 buffers. In the absence of NO, cyclic voltammetry shows that VB12 is reduced by a one-step two-electron reduction from CoIII to the CoI species. Addition of NO at pH 9 to solutions of VB12 resulted in the splitting of the cyclic voltammetry peaks as a result of a consecutive one-electron reduction of the central CoIII metal in VB12 to CoII and finally to CoI. The catalytic peak for oxidation of NO on a glassy carbon electrode modified with VB12 was observed at 1.21 V versus Ag∣AgCl, at pH 9. The products of the catalytic reduction of nitric oxide include ammonia and hydroxylamine.
- Format
- computer
- Format
- online resource
- Format
- application/pdf
- Format
- 1 online resource (9 pages)
- Format
- Publisher
- Elsevier
- Language
- English
- Relation
- Electrochimica Acta
- Relation
- Vilakazi, S.L. and Nyokong, T., 2000. Electrocatalytic properties of vitamin B12 towards oxidation and reduction of nitric oxide. Electrochimica acta, 46(4), pp.453-461
- Relation
- Electrochimica Acta volume 46 number 4 p. 453 2000 0013-4686
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the Elsevier Terms and Conditions Statement (https://www.elsevier.com/legal/elsevier-website-terms-and-conditions)
- Rights
- Closed Access
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Collections
Nyokong, Tebello (Distinguished Professor)
RU Department of Chemistry
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