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Electrochemical Catalysts
In article number 2202439, Shunsuke Yagi and co‐workers find that substitution of A‐site cations in ACu3Ru4O12 (A = Ca, Sr, La, Nd, and Ce) can affect the valence states of Cu and Ru ions and further improve the catalytic activity of the oxygen evolution reaction (OER) in acidic solutions. Besides Ru ions, Cu ions also play as active centers for OER.
The quadruple perovskite ruthenate CaCu3Ru4O12 is more active and stable than the benchmark catalyst RuO2 in the oxygen evolution reaction (OER) in acidic aqueous solutions, where many oxide‐based catalysts are dissolved. Studies on the crystal structures of quadruple perovskite ruthenates are rare, and the origin of OER activity or stability from a structural aspect has not been clarified in detail...
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