Universal Formation of Single Atoms from Molten Salt for Facilitating Selective CO2 Reduction

Universal Formation of Single Atoms from Molten Salt for Facilitating Selective CO2 Reduction

© 2024 Wiley‐VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 36(2024), 33 vom: 14. Aug., Seite e2406380
1. Verfasser: Hao, Qi (VerfasserIn)
Weitere Verfasser: Zhen, Cheng, Tang, Qi, Wang, Jiazhi, Ma, Peiyu, Wu, Junxiu, Wang, Tianyang, Liu, Dongxue, Xie, Linxuan, Liu, Xiao, Gu, M Danny, Hoffmann, Michael R, Yu, Gang, Liu, Kai, Lu, Jun
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article acidic CO2 electroreduction coordination evolution single‐atom anchoring thermal‐controlled atomization
Beschreibung
Zusammenfassung:© 2024 Wiley‐VCH GmbH.
Clarifying the formation mechanism of single-atom sites guides the design of emerging single-atom catalysts (SACs) and facilitates the identification of the active sites at atomic scale. Herein, a molten-salt atomization strategy is developed for synthesizing zinc (Zn) SACs with temperature universality from 400 to 1000/1100 °C and an evolved coordination from Zn-N2Cl2 to Zn-N4. The electrochemical tests and in situ attenuated total reflectance-surface-enhanced infrared absorption spectroscopy confirm that the Zn-N4 atomic sites are active for electrochemical carbon dioxide (CO2) conversion to carbon monoxide (CO). In a strongly acidic medium (0.2 m K2SO4, pH = 1), the Zn SAC formed at 1000 °C (Zn1NC) containing Zn-N4 sites enables highly selective CO2 electroreduction to CO, with nearly 100% selectivity toward CO product in a wide current density range of 100-600 mA cm-2. During a 50 h continuous electrolysis at the industrial current density of 200 mA cm-2, Zn1NC achieves Faradaic efficiencies greater than 95% for CO product. The work presents a temperature-universal formation of single-atom sites, which provides a novel platform for unraveling the active sites in Zn SACs for CO2 electroreduction and extends the synthesis of SACs with controllable coordination sites
Beschreibung:Date Revised 15.08.2024
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202406380