Transition Metal Ion Doping on ZIF-8 Enhances the Electrochemical CO2 Reduction Reaction

Transition Metal Ion Doping on ZIF-8 Enhances the Electrochemical CO2 Reduction Reaction

© 2022 Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 43 vom: 02. Okt., Seite e2208224
1. Verfasser: Cho, Jin Hyuk (VerfasserIn)
Weitere Verfasser: Lee, Chaehyeon, Hong, Sung Hyun, Jang, Ho Yeon, Back, Seoin, Seo, Myung-Gi, Lee, Minzae, Min, Hyung-Ki, Choi, Youngheon, Jang, Youn Jeong, Ahn, Sang Hyun, Jang, Ho Won, Kim, Soo Young
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article ZIF-8 carbon dioxide reduction carbon monoxide electrocatalyst local effects sp2 C
Beschreibung
Zusammenfassung:© 2022 Wiley-VCH GmbH.
The electrochemical reduction of CO2  to diverse value-added chemicals is a unique, environmentally friendly approach for curbing greenhouse gas emissions while addressing sluggish catalytic activity and low Faradaic efficiency (FE) of electrocatalysts. Here, zeolite-imidazolate-frameworks-8 (ZIF-8) containing various transition metal ions-Ni, Fe, and Cu-at varying concentrations upon doping are fabricated for the electrocatalytic CO2 reduction reaction (CO2 RR) to carbon monoxide (CO) without further processing. Atom coordination environments and theoretical electrocatalytic performance are scrutinized via X-ray absorption spectroscopy (XAS) and density functional theory (DFT) calculations. Upon optimized Cu doping on ZIF-8, Cu0.5 Zn0.5 /ZIF-8 achieves a high partial current density of 11.57 mA cm-2 and maximum FE for CO of 88.5% at -1.0 V (versus RHE) with a stable catalytic activity over 6 h. Furthermore, the electron-rich sp2 C atom facilitates COOH* promotion after Cu doping of ZIF-8, leading to a local effect between the zinc-nitrogen (Zn-N4 ) and copper-nitrogen (Cu-N4 ) moieties. Additionally, the advanced CO2 RR pathway is illustrated from various perspectives, including the pre-H-covered state under the CO2 RR. The findings expand the pool of efficient metal-organic framework (MOF)-based CO2 RR catalysts, deeming them viable alternatives to conventional catalysts
Beschreibung:Date Revised 26.10.2023
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202208224