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Perovskite oxide Sr2Fe1.3Cu0.2Mo0.5O6−δ (SFCM) is prepared and evaluated as a novel cathode material for solid oxide electrolytic cells (SOECs).

Green biomass derived three-dimensional interconnected porous carbon skeletons with in situ decorated IrCo nanoparticles were fabricated for high-performance Li–O2 batteries.

The design of active cathode catalysts, with abundant active sites and outstanding catalytic activity for CO 2 electroreduction, is important to promote the development of solid oxide electrolysis cells (SOECs). Herein, A-site-deficient perovskite oxide (La 0.2 Sr 0.8 ) 0.9 Ti 0.5 Mn 0.4 Cu 0.1 O 3−δ (LSTMC) is synthesized and studied as a promising cathode for SOECs. Cu nanoparticles can be rapidly and uniformly in situ-exsolved under reducing conditions. The heterostructure formed by the exsoluted Cu and LSTMC provides abundant active sites for the catalytic conversion of CO 2 to CO. Combined with the remarkable oxygen-ion transport capacity of the LSTMC substrate, the specially designed Cu@LSTMC cathode exhibits a dramatically improved electrochemical performance. Furthermore, first-principles calculations proposed a mechanism for the adsorption and activation of CO 2 by the heterostructure. Electrochemically, the Cu@LSTMC presents a high current density of 2.82 A cm −2 at 1.8 V and 800 °C, which is about 2.5 times higher than that of LSTM (1.09A cm −2 ).

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