Synergizing Electron and Heat Flows in Photocatalyst for Direct Conversion of Captured CO2
Journal Article
·
· Angewandte Chemie (International Edition)
- Yale University, New Haven, CT (United States); Yale University, West Haven, CT (United States); OSTI
- Emory University, Atlanta, GA (United States)
- Cornell University, Ithaca, NY (United States)
- Yale University, New Haven, CT (United States); Yale University, West Haven, CT (United States)
- Yale University, New Haven, CT (United States)
We report a ternary hybrid photocatalyst architecture with tailored interfaces that boost the utilization of solar energy for photochemical CO2 reduction by synergizing electron and heat flows in the photocatalyst. The photocatalyst comprises cobalt phthalocyanine (CoPc) molecules assembled on multiwalled carbon nanotubes (CNTs) that are decorated with nearly monodispersed cadmium sulfide quantum dots (CdS QDs). The CdS QDs absorb visible light and generate electron-hole pairs. The CNTs rapidly transfer the photogenerated electrons from CdS to CoPc. The CoPc molecules then selectively reduce CO2 to CO. Here, the interfacial dynamics and catalytic behavior are clearly revealed by time-resolved and in situ vibrational spectroscopies. In addition to serving as electron highways, the black body property of the CNT component can create local photothermal heating to activate amine-captured CO2, namely carbamates, for direct photochemical conversion without additional energy input.
- Research Organization:
- University of North Carolina, Chapel Hill, NC (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); U.S. National Science Foundation (NSF)
- Grant/Contract Number:
- SC0021173
- OSTI ID:
- 2421786
- Alternate ID(s):
- OSTI ID: 1975158
- Journal Information:
- Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 23 Vol. 62; ISSN 1433-7851
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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