CO_(2)-to-formate electrosynthesis with high selectivity and stability has been a long-sought objective.Unfortunately,most catalysts undergo structural and valence state changes due to surface oxidation during operati...CO_(2)-to-formate electrosynthesis with high selectivity and stability has been a long-sought objective.Unfortunately,most catalysts undergo structural and valence state changes due to surface oxidation during operation or storage,resulting in decreased catalytic performance.Herein,we report a efficient and stable BiIn@Cu-foam electrode through the in-situ regeneration of Bi^(0) active sites to renew the surface activation.The electronic structure of Bi site can be regulated by introducing In,thereby enhancing the adsorption strength of*OCHO.The optimized electrode exhibits over 90%FE_(formate)at a wide potential window(-0.9–-2.2 V),and formation rate for 3.15 mM cm^(-1)h^(-1).Especially,the electrode can maintain the high performance at continuously electrolysis for more than 300 h,or for more than 50 cycles,even repeated operation and storage for more than 2 years.This work provides a promising candidate and new insight to construct industrially viable stable Bi-based catalyst for formate electrosynthesis.展开更多
基金supported by the National Natural Science Foundation of China(22238013 and 22178393)Postdoctoral Science Foundation of Central South University(320808)+1 种基金Natural Science Foundation of Hunan Province(2023JJ40706)the High Performance Computing Center of Central South University。
文摘CO_(2)-to-formate electrosynthesis with high selectivity and stability has been a long-sought objective.Unfortunately,most catalysts undergo structural and valence state changes due to surface oxidation during operation or storage,resulting in decreased catalytic performance.Herein,we report a efficient and stable BiIn@Cu-foam electrode through the in-situ regeneration of Bi^(0) active sites to renew the surface activation.The electronic structure of Bi site can be regulated by introducing In,thereby enhancing the adsorption strength of*OCHO.The optimized electrode exhibits over 90%FE_(formate)at a wide potential window(-0.9–-2.2 V),and formation rate for 3.15 mM cm^(-1)h^(-1).Especially,the electrode can maintain the high performance at continuously electrolysis for more than 300 h,or for more than 50 cycles,even repeated operation and storage for more than 2 years.This work provides a promising candidate and new insight to construct industrially viable stable Bi-based catalyst for formate electrosynthesis.
