B-side rock-salt-ordered Cu-based double perovskite realizes high efficiency and stable CO₂ charging

Carbon dioxide charge (CO₂RR) high-value chemical feedstocks and fuels as a potential way to realize a carbon-neutral cycle. Cu-oxide based catalysts are promising for CO₂ voltage, but suffers from inevitable reduction and structural collapse, leading to transient electrocatalytic properties.

Prof. Zhu Jiawei and Jiang Heqing from the Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, developed a p-side rock-salt-ordered double perovskite oxide of Sr.₂CuWO₆ with superexchange-stabilized long-range Cu sites for efficient and stable CO₂ the charge.

study Published in Natural communication On February 21.

Researcher Sr₂CuWO₆ As a proof-of-concept model catalyst. Sr₂CuWO₆ The B-site exhibited rock-salt ordering, resulting in long Cu-Cu distances and superexchange interactions.

Its long-range Cu sites facilitate *CO hydrogenation and inhibit CC coupling. Meanwhile, the superexchange interaction stabilizes Cu sites and prevents structural collapse. These factors realized the superior performance of Sr₂CuWO₆ for stable CO₂ electromethanation, which achieved high FE_Ch4 73.1% and a higher area current density of 292.4 mA cm.^-2.

Notably, Sr₂CuWO₆ provides excellent performance of electromethanation over perovskite catalysts.

This work discovers an efficient and stable Cu-based double perovskite oxide for CO₂RR, which opens a new avenue for the rational design of more advanced Cu-based catalysts.