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'Graphite Electrodes' in keywords Facet   section ZfN Section B  [X]
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1982 (1)
1981 (1)
1Author    Elli Theodoridou, Dimitrios JannakoudakisRequires cookie*
 Title    Elektrochemisches Verhalten der Nitrophenole und ihrer Reduktionsprodukte an Graphitelektroden Electrochemical Behavior of the Nitrophenols and Their Reduction Products at Graphite Electrodes  
 Abstract    The electrochemical reduction of the isomeric nitrophenols at graphite electrodes is investigated in aqueous solutions with pH = 1-13 and is compared with the electro-chemical oxidation of their reduction products. o-Nitrophenol and jo-nitrophenol are reduced to the corresponding amines, as the observed oxidation peaks in their cyclic voltammograms can be simulated by those of o-and p-aminophenol. m-Nitrophenol is reduced to m -hydroxylaminophenol, as its oxidation peak appears at much more negative » potential than that of m-aminophenol, within the potential range of the oxidation of phenylhydroxylamine. The pH-dependence of the reduction potentials of the nitrophenols at the graphite electrodes is discussed in comparison with that at a hanging mercury drop electrode. 
  Reference    Z. Naturforsch. 36b, 840—845 (1981); eingegangen am 12. Februar 1981 
  Published    1981 
  Keywords    Cyclic Yoltammetry, Nitrophenols, Graphite Electrodes 
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 DEBUG INFO      
 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0840.pdf 
 Identifier    ZNB-1981-36b-0840 
 Volume    36 
2Author    Elli Theodoridou, Pantelis Karabinas, Dimitrios JannakoudakisRequires cookie*
 Title    Elektrochemisches Verhalten der Nitrophenole und ihrer Reduktionsprodukte an Graphitelektroden, II Mechanismus und Kinetik Electrochemical Behavior of the Nitrophenols and their Reduction Products at Graphite Electrodes, II Mechanism and Kinetic  
 Abstract    The mechanism of the electrochemical reactions of l-nitro-2-naphthol, o-nitrophenol and p-nitrophenol at carbon fibre electrodes is investigated in aqueous solutions with pH= 1-10. The above nitrophenols are reduced to the corresponding amines, which are reoxidized to quinone imines. As the quinone imines are partially hydrolysed to quinones, the kinetic of this hydrolysis reaction is also examined. In the case of l-nitro-2-naphthol the hydrolysis rate constant of 1,2-naphthoquinone imine is estimated as a function of pH by cyclic voltammetry. 
  Reference    (Z. Naturforsch. 37b, 97—101 [1982]; eingegangen am 14. September 1981) 
  Published    1982 
  Keywords    Cyclic Voltammetry, Graphite Electrodes, o-Nitrophenol, 1, 2-Naphthoquinoneimine 
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 DEBUG INFO      
 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0097.pdf 
 Identifier    ZNB-1982-37b-0097 
 Volume    37