Back to Search
Start Over
Zeolitic imidazole framework-derived FeN5-doped carbon as superior CO2 electrocatalysts.
- Source :
-
Journal of Catalysis . Mar2021, Vol. 395, p63-69. 7p. - Publication Year :
- 2021
-
Abstract
- [Display omitted] • Highly exposed isolated FeN 5 sites are embedded in N-doped carbon frameworks. • FeN 5 exhibits a maximum FE CO of 98% and over 95% from −0.4 to −1.0 V vs. RHE. • The axial coordinated N modulates the d -band center and facilitates CO desorption. • FeN 4 and axial coordinated N act synergistically to boost CO 2 -to-CO conversion. Electrochemical CO 2 conversion offers a sustainable approach to alleviate the energy crisis but remains a long-standing challenge. Herein, atomically dispersed FeN 5 sites anchored on N-doped carbon matrix templated by zeolitic imidazole framework-8 (ZIF-8) are facilely synthesized for efficient catalyzing CO 2 reduction. The FeN 5 single-atom catalyst (Fe-SA/ZIF) presents the Faradaic efficiency of 98% at −0.7 V vs. RHE and over 95% in a wide potential range from −0.4 to −1.0 V vs. RHE, surpassing most of the reported single-atom catalysts for CO 2 RR. Further density functional theory (DFT) calculations reveal that the outstanding activity of FeN 5 sites mainly originates from the lowered d -band center modulated by the out-of-plane coordinated pyridinic N, which reduces the CO adsorption energy from −1.71 to −1.49 eV compared to FeN 4 moieties. Thus, the synergistic effect between FeN 4 sites and the coordinated pyridine offers new insight in designing outstanding electrocatalysts for multiple applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219517
- Volume :
- 395
- Database :
- Academic Search Index
- Journal :
- Journal of Catalysis
- Publication Type :
- Academic Journal
- Accession number :
- 149886924
- Full Text :
- https://doi.org/10.1016/j.jcat.2020.12.032