Electrocatalytic Oxidation of 1-Propanol and 2-Propanol on Electro-active Films Derived from Ni II-(N,N′-bis(2-Hydroxy, 3-Methoxy Benzaldehyde)-1,2-Propandiimine) Modified Glassy Carbon Electrode

Jafarian, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1007/s12678-011-0049-y
  3. Abstract:
  4. Complexes of Ni II-(N,N′-bis(2-hydroxy, 3-methoxy benzaldehyde)-1,2-propandiimine) can be electro-polymerized onto GC electrode in an alkaline solution to give an electro-active film strongly adhered on the electrode surface. In alkaline solution, this poly-(Ni II{sal-1,2-pn(3-OMe) 2})/GC film shows the typical voltammetric response of a surface-immobilized redox couple, as can be anticipated for the Ni 2+/Ni 3+ transitions into the film. In addition, the film exhibits a potent and persistent electro-catalytic activity towards the oxidation of 1- and 2-propanol. In CV studies, in the presence of these alcohols, poly-(Ni II{sal-1,2-pn(3-OMe) 2})/GC electrode shows a new oxidation peak for the alcohols at a potential much more positive than the oxidation peak potential of Ni II species. Based on a proposed mechanism, Ni III sites act as active surface for the direct electro-oxidation of alcohols. The corresponding rate laws have been derived, and the kinetic parameters have been obtained. Also, an amperometric procedure has been successfully applied to the determination of the alcohols
  5. Keywords:
  6. 1-Propanol ; 2-Propanol ; Direct electro-oxidation mechanism ; Electro-polymerization ; Modified electrodes ; Schiff base complexes
  7. Source: Electrocatalysis ; Volume 2, Issue 3 , Volume 2, Issue 3 , 2011 , Pages 163-171 ; 18682529 (ISSN)
  8. URL: http://link.springer.com/article/10.1007%2Fs12678-011-0049-y