Portal de Periódicos da CAPES

Studies on oxygen reduction in molten NaOH

1983; Elsevier BV; Volume: 28; Issue: 2 Linguagem: Inglês

10.1016/0013-4686(83)85101-9

1873-3859

Hidetaka Hayashi, Shiro Yoshizawa, Yasuhiko Ito,

Molten salt chemistry and electrochemical processes

Oxygen reduction in molten NaOH at 623 K has been studied by the use of an Ni rotating disk electrode and a porous O2 gas electrode. It was clarified that the diffusing species to the electrode surface is molecular oxygen itself, and not an oxygen-containing anion, such as O2−2, by limiting current measurements. Kinetic studies show that the following reaction mechanism is more probable: where the latter is rate determining. Since H2O transport to the electrode surface is rate determining, pO2− control is especially important, taking into account the following equilibrium;