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Title: Synergizing Electron and Heat Flows in Photocatalyst for Direct Conversion of Captured CO 2

Journal Article · · Angewandte Chemie
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  1. Department of Chemistry Yale University New Haven CT 06511 USA, Energy Sciences Institute Yale University West Haven CT 06516 USA
  2. Department of Chemistry Emory University Atlanta GA 30322 USA
  3. Department of Materials Science and Engineering Cornell University Ithaca NY 14853 USA
  4. Department of Chemistry Yale University New Haven CT 06511 USA
+ Show Author Affiliations

Abstract We report a ternary hybrid photocatalyst architecture with tailored interfaces that boost the utilization of solar energy for photochemical CO 2 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 CO 2 to CO. 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 CO 2 , namely carbamates, for direct photochemical conversion without additional energy input.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0021173
OSTI ID:
1975297
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Vol. 135 Journal Issue: 23; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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