Solar–Driven CO2 Conversion via Optimized Photothermal Catalysis in a Lotus Pod Structure
Journal Article
·
· Angewandte Chemie (International Edition)
- Yale University, New Haven, CT (United States); Yale University, West Haven, CT (United States); OSTI
- Yale University, New Haven, CT (United States); Yale University, West Haven, CT (United States)
- University of Pennsylvania, Philadelphia, PA (United States)
Photothermal CO2 reduction is one of the most promising routes to efficiently utilize solar energy for fuel production at high rates. However, this reaction is currently limited by underdeveloped catalysts with low photothermal conversion efficiency, insufficient exposure of active sites, low active material loading, and high material cost. Herein, we report a potassium-modified carbon-supported cobalt (K+–Co–C) catalyst mimicking the structure of a lotus pod that addresses these challenges. As a result of the designed lotus-pod structure which features an efficient photothermal C substrate with hierarchical pores, an intimate Co/C interface with covalent bonding, and exposed Co catalytic sites with optimized CO binding strength, the K+–Co–C catalyst shows a record-high photothermal CO2 hydrogenation rate of 758 mmol gcat–1 h–1 (2871 mmol gCo–1 h–1) with a 99.8 % selectivity for CO, three orders of magnitude higher than typical photochemical CO2 reduction reactions. Here, we further demonstrate with this catalyst effective CO2 conversion under natural sunlight one hour before sunset during the winter season, putting forward an important step towards practical solar fuel production.
- Research Organization:
- University of North Carolina, Chapel Hill, NC (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0021173
- OSTI ID:
- 2421787
- Alternate ID(s):
- OSTI ID: 1984911
- Journal Information:
- Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 30 Vol. 62; ISSN 1433-7851
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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