A three-dimensional highly interconnected composite oxygen reduction reaction electrocatalyst prepared from a core-shell precursor
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Getting intimate: A 3D interconnected Bi 0.5Sr 0.5FeO 3-d (BSF)-Ag electrocatalyst is prepared from a BSF-AgNO 3 core-shell precursor in one step. The nanometer-sized Ag enhances the sintering process, enabling an optimum cathode microstructure and good cathode-to-electrolyte attachment upon firing at 850°C. A solid-oxide fuel cell based on this cathode shows a near 100% peak power density enhancement at 550°C.