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High dispersion dendritic fibrous morphology nanospheres for electrochemical CO2 reduction to C2H4.
- Source :
-
Journal of Colloid & Interface Science . Nov2023:Part B, Vol. 650, p1446-1456. 11p. - Publication Year :
- 2023
-
Abstract
- [Display omitted] The electrochemical CO 2 reduction to specific multi-carbon product on copper-based catalysts is subjected to low activity and poor selectivity. Herein, catalyst structure, morphology, and chemical component are systematically studied for bolstering the activity and selectivity of as-prepared catalyzers in this study. Dendritic fibrous nano-silica spheres favor the loading of active species and the transport of reactant from the central radial channel. Cu/DFNS with high dispersion active sites are fabricated through urea-assisted precipitation way. The coexistence of Cu(I)/Cu(II) induces a close combination of Cu active sites and CO 2 on the Cu/DFNS interface, promoting the CO 2 activation and C C coupling. The Cu–O–Si interface (Cu phyllosilicate) can improve CO 2 and CO attachment. Cu/DFNS show the utmost Faradaic efficiency of C 2 H 4 with a value of 53.04% at −1.2 V vs. RHE. And more importantly, in-situ ATR-SEIRAS reveals that the C C coupling is boosted for effectively producing C 2 H 4 as a consequence of the existence of *CO L , *COOH, and *COH intermediates. The mechanism reaction path of Cu/DFNS is inferred to be *CO 2 → *COOH → *CO → *CO*COH → C 2 H 4. Our findings will be helpful to gain insight into the links between morphology, texture, chemical component of catalyzers, and electrochemical reduction of CO 2 , providing valuable guidance in the design of more efficient catalysts. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 650
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 169922499
- Full Text :
- https://doi.org/10.1016/j.jcis.2023.07.118