Lanthanide single-atom catalysts for efficient CO2-to-CO electroreduction

Wang, Qiyou; Luo, Tao; Cao, Xueying; Gong, Yujie; Liu, Yuxiang; Xiao, Yusen; Li, Hongmei; Gröbmeyer, Franz; Lu, Ying-Rui; Chan, Ting-Shan; Ma, Chao; Liu, Kang; Fu, Junwei; Zhang, Shiguo; Liu, Changxu; Lin, Zhang; Chai, Liyuan; Cortes, Emiliano; Liu, Min (2025): Lanthanide single-atom catalysts for efficient CO2-to-CO electroreduction. Nature Communications, 16: 2985. ISSN 2041-1723

Abstract

Single-atom catalysts (SACs) have received increasing attention due to their 100% atomic utilization efficiency. The electrochemical CO 2 reduction reaction (CO 2 RR) to CO using SAC offers a promising approach for CO 2 utilization, but achieving facile CO 2 adsorption and CO desorption remains challenging for traditional SACs. Instead of singling out specific atoms, we propose a strategy utilizing atoms from the entire lanthanide (Ln) group to facilitate the CO 2 RR. Density functional theory calculations, operando spectroscopy, and X-ray absorption spectroscopy elucidate the bridging adsorption mechanism for a representative erbium (Er) single-atom catalyst. As a result, we realize a series of Ln SACs spanning 14 elements that exhibit CO Faradaic efficiencies exceeding 90%. The Er catalyst achieves a high turnover frequency of ~130,000 h − 1 at 500 mA cm − 2 . Moreover, 34.7% full-cell energy efficiency and 70.4% single-pass CO 2 conversion efficiency are obtained at 200 mA cm − 2 with acidic electrolyte. This catalytic platform leverages the collective potential of the lanthanide group, introducing new possibilities for efficient CO 2 -to-CO conversion and beyond through the exploration of unique bonding motifs in single-atom catalysts.

• Dokumententyp: Artikel (LMU)
• Organisationseinheit (Fakultäten): 17 Physik
• DFG-Fachsystematik der Wissenschaftsbereiche: Naturwissenschaften
• DFG: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 390776260
• DFG: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 491502892