- Title
- Cobalt (II) porphyrazine catalysed reduction of nitrite
- Creator
- Thamae, Mamothibe
- Creator
- Nyokong, Tebello
- Subject
- To be catalogued
- Date Issued
- 1999
- Date
- 1999
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/293162
- Identifier
- vital:57061
- Identifier
- xlink:href="https://doi.org/10.1016/S0022-0728(99)00224-7"
- Description
- Studies on the catalytic reduction of nitrite on carbon electrodes modified with Co(II) tetra-2,3-pyridinoporphyrazine (CoTppa, 1), N,N′,N′′,N′′′-tetramethyltetra-2,3-pyridinoporphyrazine ([CoTm-2,3-tppa]4+, 2) and Co(II) N,N′,N′′,N′′′-tetramethyltetra-3,4-pyridinoporphyrazine ([CoTm-3,4-tppa]4+, 3) are reported. There is a close correspondence between the proximity of the methyl groups to the porphyrazine ring and the catalytic activity of the porphyrazine complexes. Bulk electrolysis gave ammonia and hydroxylamine as some of the products. The catalytic activity of the cationic complex, 3, towards the detection of low concentrations of nitrite (less than 10−9 M) in water containing sodium sulfate, was compared with the activities of the anionic cobalt(II) tetrasulfophthalocyanine ([CoTSPc]4−, 4) and the mixed [CoIITm-3,4-tppa]4+·[CoTSPc]4− (5) complexes. Complex 5 showed the best catalytic activity of the three in that large currents were obtained for very low concentrations of nitrite.
- Format
- computer
- Format
- online resource
- Format
- application/pdf
- Format
- 1 online resource (10 pages)
- Format
- Publisher
- Elsevier
- Language
- English
- Relation
- Journal of Electroanalytical Chemistry
- Relation
- Thamae, M. and Nyokong, T., 1999. Cobalt (II) porphyrazine catalysed reduction of nitrite. Journal of Electroanalytical Chemistry, 470(2), pp.126-135
- Relation
- Journal of Electroanalytical Chemistry volume 470 number 2 p. 126 1999 1873-2569
- 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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Nyokong, Tebello (Distinguished Professor)
RU Department of Chemistry
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