Anodic Materials for the Electrolysis of Water
On the basis of previously described results, which showed that aNiLa2O4, Film on metallic substrates could be a good electrocatalyst for the oxygen evolution reaction, in this work it has been examined the possibility of obtaining better electrocatalysts and it has been conducted a systematic study in order to determine the best deposition conditions.
In the first part the basic NiLa2O4 material has been modified by doping with mono (Li), di (Mg), and three (Fe) valent cations, Ni has been completely or partially substituted with Co, the partial introduction of S in the network instead of oxygen has been attempted.
Whilst the various so prepared materials show a catalytic activity comparable to that of NiLa2O4, a mixed Ni, Coy La oxide of nominal formula Ni0.2Co0.8LaO3 gives the best results at 80C on Pt and also at 110C on Ni.
In the second part of the work various parameters have been exa mined and the best set of deposition conditions of the catalytic films on Ni is obtained with the decomposition of a mixture of nitrates from a propanolic solution at 200C followed by a final thermal treament at 650C.
KeywordsPorosity Sulphide Europe Platinum Argon
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