✦ LIBER ✦

Comparative behaviour of various oxides in the electrochemical reactions of oxygen evolution and reduction in alkaline medium

✍ Scribed by G. Bronoel; J.C. Grenier; J. Reby

Publisher: Elsevier Science
Year: 1980
Tongue: English
Weight: 380 KB
Volume: 25
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(80)87007-1

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✦ Synopsis

The electrochemical behaviour of ferrites having the composition La, _,Sr,FeO,_,in the oxygen reaction has been studied. The catalytic activity of these compounds was compared with that of copper manganite Cu, ..Mn, .604 and that of lanthanum strontium cobaltite La,,,Sr,,,CoO, as well as with that of surface oxides developed on nickel and its alloys. It was shown that in the evolution of oxygen, nickel and its alloys (NiBe-NiCo,)

are the least polarizable materials.

In the reduction of oxygen, it was shown that all the mixed oxides undergo reduction at the same time as the reduction of oxygen. For the ferrites, the catalytic activity for oxygen reduction is related to the fraction of vacancies existing in the compound.

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