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Encapsulated Co–Ni alloy boosts high-temperature CO2 electroreduction
An optimized Co–Ni alloy catalyst encapsulated with Sm2O3-doped CeO2 shows both high activity and stability for high-temperature CO2-to-CO conversion, overcoming the limitations of such catalysts typically used in industrial applications.
In a preliminary screening of various second non-precious metals, the Co x Ni 1− x@SDC catalyst showed the highest current densities for CO 2 electroreduction to CO at all investigated cell voltages at 800 °C, while maintaining a Faradaic efficiency of CO (FE CO) close to 100% (Supplementary Fig. X-ray absorption spectroscopy (XAS) measurements were performed at the 12B2 Taiwan beamline (SPring-8, Japan) of the National Synchrotron Radiation Research Center, operated at an 8.0 GeV storage ring with a constant current of approximately 99.5 mA. 11227902); G. Wang, R. Li and Y. Shen from the Dalian Institute of Chemical Physics for assistance with some characterizations; and B. Victor from CIME, EPFL, for conducting aberration-corrected high-angle annular dark-field scanning transmission electron microscopy.
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