Accession Number : AD0013646


Title :   THEORY OF ELECTROLYSIS AT CONSTANT CURRENT WITH PARTIAL OR TOTAL CONTROL BY DIFFUSION-APPLICATION TO THE STUDY OF COMPLEXION IONS


Descriptive Note : Technical rept.


Corporate Author : LOUISIANA STATE UNIV BATON ROUGE


Personal Author(s) : Delahay, Paul ; Berzins, Talivaldis


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/013646.pdf


Report Date : Dec 1952


Pagination or Media Count : 41


Abstract : A mathematical analysis is presented for the potential-time curves observed in electrolysis at a constant current with the mass transfer partially or totally controlled by semi-infinite linear diffusion. Three cases are considered: (1) the reversible electrochemical process, (2) the irreversible electrochemical process, and (3) the electrochemical process preceded by a first-order chemical reaction. The transition time (tau) which characterizes the curves was derived for the 3 processes. The tau for given conditions of electrolysis was the same for processes 1 and 2. For the last process, tau was a function of the kinetics of the first-order reaction. Conditions are discussed under which the theory is applicable to the reduction of completions. Dissociation must precede the electrochemical reaction for some complexes (Cd(CN) to the minus power of 4); others (Cu ethylene-diamine) are reduced directly. The rate of recombination of Cd to the power of 2 plus and CN to the minus power was about 4 x 10 to the power of 9 (mol/l) to the minus power of 1- sec to the minus power of 1.


Descriptors :   *ELECTROLYSIS , *COMPLEX IONS , CHEMICAL REACTIONS , REVERSIBLE , MASS TRANSFER , DIFFUSION , DISSOCIATION , IRREVERSIBLE PROCESSES , MATHEMATICAL ANALYSIS , ELECTROCHEMISTRY , TRANSITIONS


Subject Categories : Physical Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE