Arulraj, I. and Chandrasekaran, R. and Venkatesan, V.K.
(1987)
The lanthanum barium manganate, la(l-4)Ba2MnO3 - A possible electrocatalyst for oxygen evolution reaction in alkaline medium.
Bulletin of Electrochemistry , 3 (5).
pp. 443-449.
ISSN 0256-1654
Abstract
Three different non-stoichiometric compositions of lanthanum barium manganate (LBM) have been synthesized and investigated
for its possible application as anode catalyst in alkaline water electrolysis. The results of these investigations have shown that
LBM is a good electrocatalyst for the oxygen evolution reaction. Of the three oxides examined, La2., Ba2Mn03 has been
found to be the best. The above oxide electrodes have been scaled up from 1 cdt o 10 cdi n apparent area. The electrochemical
stability over an operation duration of 500 hrs and the resulting time variation effect on the anode potential have
been brought out at normal alkaline water electrolysis conditions of 3 KA.m-2 and 80% when a reduction of 0.1 V - 0.15 V
in oxygen overpotential has been observed on these catalysts as compared to that of smooth nickel electrodes under identical
conditions. The electrocatalytic activity of the oxides has been discussed from the point of view of structural distortion and
means for further improvement have been suggested.
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