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Efficient electron transmission in covalent organic framework nanosheets for highly active electrocatalytic carbon dioxide reduction.
- Source :
-
Nature communications [Nat Commun] 2020 Jan 24; Vol. 11 (1), pp. 497. Date of Electronic Publication: 2020 Jan 24. - Publication Year :
- 2020
-
Abstract
- Efficient conversion of carbon dioxide (CO <subscript>2</subscript> ) into value-added products is essential for clean energy research. Design of stable, selective, and powerful electrocatalysts for CO <subscript>2</subscript> reduction reaction (CO <subscript>2</subscript> RR) is highly desirable yet largely unmet. In this work, a series of metalloporphyrin-tetrathiafulvalene based covalent organic frameworks (M-TTCOFs) are designed. Tetrathiafulvalene, serving as electron donator or carrier, can construct an oriented electron transmission pathway with metalloporphyrin. Thus-obtained M-TTCOFs can serve as electrocatalysts with high FE <subscript>CO</subscript> (91.3%, -0.7 V) and possess high cycling stability (>40 h). In addition, after exfoliation, the FE <subscript>CO</subscript> value of Co-TTCOF nanosheets (~5 nm) is higher than 90% in a wide potential range from -0.6 to -0.9 V and the maximum FE <subscript>CO</subscript> can reach up to almost 100% (99.7%, -0.8 V). The electrocatalytic CO <subscript>2</subscript> RR mechanisms are discussed and revealed by density functional theory calculations. This work paves a new way in exploring porous crystalline materials in electrocatalytic CO <subscript>2</subscript> RR.
Details
- Language :
- English
- ISSN :
- 2041-1723
- Volume :
- 11
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Nature communications
- Publication Type :
- Academic Journal
- Accession number :
- 31980641
- Full Text :
- https://doi.org/10.1038/s41467-019-14237-4