Accession Number : AD0729047

Title :   Electrochemical Reduction of Oxygen in Carbonate and Carbonate-Halide Melts.

Descriptive Note : Technical rept.,

Corporate Author : RENSSELAER POLYTECHNIC INST TROY N Y DEPT OF CHEMISTRY

Personal Author(s) : Lorenz,P. K. ; Janz,G. J.

Report Date : AUG 1971

Pagination or Media Count : 21

Abstract : The electrochemical reduction of O2 in molten carbonates occurs through two reactions (1) 1/2O2 + CO2 + 2e = CO3(-2) and (2) 1/2O2 + 2e = O(-2). The onset of these two processes has been investigated in molten Li2CO3, the ternary eutectic (Li,Na,K)/CO3, and the two binary eutectics (LiCl,Li2CO3) and (LiF,Li2CO3). Reaction (1) was found to start at slightly negative potentials relative to the Au/O2,CO2 reference electrode and depends on the supply of CO2 from the melt. The onset of reaction (2) occurs at more negative polarizations; both are affected by the solubility of O2 in the melt. The results are examined relative to the differing viewpoints advanced relative to the electrochemical reduction of oxygen in such molten electrolytes. (Author)

Descriptors :   (*ELECTROCHEMISTRY, OXYGEN), (*OXYGEN, *REDUCTION(CHEMISTRY)), (*CARBONATES, ELECTROCHEMISTRY), ELECTROLYTES, CARBON DIOXIDE, CHEMICAL EQUILIBRIUM, HALIDES, LITHIUM FLUORIDES, LITHIUM COMPOUNDS

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE