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The electrochemical performance of the layered perovskite YSr2Cu3−xCoxO7+δ, a potential solid oxide fuel cell (SOFC) cathode, is improved by increasing the Co content from x = 1.00 to a maximum of x = 1.30. Single phase samples with x > 1.00 are obtained by tuning the Y/Sr ratio, yielding the composition Y1−ySr2+yCu3−xCoxO7+δ (where y ≤ 0.05). The high temperature structure of Y0.95Sr2.05Cu1.7Co...
The infinite layer Ni(I) containing phase NdNiO 2+x (x=0.03) has been synthesised by low temperature reaction between NdNiO 3 and NaH: reduction with H 2 or metal gettering reagents does not afford this phase. The reaction path from the Ni(III) perovskite differs from the case of LaNiO 2 . Structural analysis by neutron powder diffraction reveals the environment around...
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