Title of article :
Voltammetry of multi-electron electrode processes of organic species
Author/Authors :
Batchelor-McAuley، نويسنده , , Christopher H Compton، نويسنده , , Richard G.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
9
From page :
73
To page :
81
Abstract :
Classically the analysis of the voltammetric response of multi-electron transfer processes is achieved through the use of the Randles–Ševčík equations based on analytical theory. In such it is assumed that the after the ‘rate determining step’ all electron transfers are highly driven. Conversely, it is commonly found experimentally that the formal potentials for different electrochemical steps (1, 2, 3 … ) are found to be at comparable potentials (i.e. E f , 1 θ ∼ E f , 2 θ ∼ E f , 3 θ ); this leads to significant deviations from the Randles–Ševčík analysis. This article highlights various ‘simple’ electrochemical mechanisms (EE, EC, EEC) and discusses how the voltammetric peak height resulting from linear sweep voltammetry is expected to vary with scan rate and other parameters, with the aim of providing a general theoretical basis upon which analysis of complex voltammetric systems may be approached and understood.
Keywords :
guanine , Mechanistic voltammetry , Multi-electron process , Butler–Volmer equation , Randles–?ev??k , quinones
Journal title :
Journal of Electroanalytical Chemistry
Serial Year :
2012
Journal title :
Journal of Electroanalytical Chemistry
Record number :
1675703
Link To Document :
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