Abstract
Perovskite-type mixed oxides with the formula La1−xGa0.3Cr0.7O3−δ (x=0.2; 0.1; 0.05; 0) were investigated in view of their usability as electrode materials in exhaust gas sensors for HC detection. The electrode materials were characterised regarding their structure, catalytic activity for propene oxidation and potentiometric behaviour in combustible gaseous mixtures. XRD-measurements indicate, that the solid oxide method does not permit lanthanum deficiencies x ≥ 0.05. The electrodes show non Nernstian behaviour.
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