Studies on oxygen reduction in molten NaOH

✍ Scribed by Hidetaka Hayashi; Shiro Yoshizawa; Yasuhiko Ito

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 425 KB
• Volume: 28
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(83)85101-9

✦ Synopsis

Oxygen reduction in molten NaOH at 623 K has been studied by the use of an Ni rotating disk electrode and a porous 0, gas electrode. It was clarified that the diffusing species to the electrode surface is molecular oxygen itselC,and not an oxygencontaininganion, such as 0 : _, by limiting current measurements. Kinetic studies show that the following reaction mechanism is more probable: 0,+2r-40:-, O",-+ Hz0 --t 20H -+ 1/201, where the latter is rate determining. Since H,O transport to the electrode surface is rate determining, ~0'~ control is especially important, taking into account the following equilibrium;