Accession Number : ADA297630

Title :   Anodization of Copper Microelectrodes in a Complexing Medium: Determination of Stability Constants of Products.

Descriptive Note : Technical rept. no. 1, 1 Jun 94-31 May 95,

Corporate Author : NORTH CAROLINA STATE UNIV AT RALEIGH

Personal Author(s) : Orr, James T. ; Wikiel, Kazimierz ; Osteryoung, Janet G.

PDF Url : ADA297630

Report Date : 25 JUL 1995

Pagination or Media Count : 43

Abstract : A model is presented for the anodization of a metal electrode by normal pulse voltammetry in complexing medium. The analysis is based on analytical expressions for current during normal pulse voltammetry at a microelectrode. It is applied to the anodization of a copper microdisk electrode in aqueous chloride solutions. Optimization of the fit of the model to the data yields the overall formation constants of CuCl (K1) and CuCl2 (beta 2) as log K1 = 2.93 (+0.02, - 0.05), and log beta 2 = 5.54 (+0.12, - 0.17). These values agree with those found in the literature. The advantages of this analysis over traditional approaches which employ an approximation of small current are described. jg p.1

Descriptors :   *METALS, *COPPER, *CONSTANTS, STABILITY, OPTIMIZATION, SOLUTIONS(MIXTURES), WATER, PULSES, MATHEMATICAL ANALYSIS, ELECTRODES, LIGANDS, CHLORIDES, VOLTAMMETRY.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Electrical and Electronic Equipment
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE