Journal
SCIENCE ADVANCES
Volume 3, Issue 7, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.1700921
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Funding
- U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences [DE-AC02-05CH11231]
- Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the DOE [DE-AC02-05CH11231]
- DOE, Office of Science, Office of Basic Energy Sciences Materials Sciences and Engineering Division [DE-AC02-05-CH11231]
- Early Career program [MSE08]
- Nanyang Technological University
- BEARS (Berkeley Education Alliance for Research in Singapore) at University of California, Berkeley
- [DE-SC0012704]
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Solar-driven photocatalytic conversion of CO2 into fuels has attracted a lot of interest; however, developing active catalysts that can selectively convert CO2 to fuels with desirable reaction products remains a grand challenge. For instance, complete suppression of the competing H-2 evolution during photocatalytic CO2-to-CO conversion has not been achieved before. We design and synthesize a spongy nickel-organic heterogeneous photocatalyst via a photochemical route. The catalyst has a crystalline network architecture with a high concentration of defects. It is highly active in converting CO2 to CO, with a production rate of similar to 1.6 x 104 mmol hour(-1) g(-1). No measurable H-2 is generated during the reaction, leading to nearly 100% selective CO production over H-2 evolution. When the spongy Ni-organic catalyst is enriched with Rh or Ag nanocrystals, the controlled photocatalytic CO2 reduction reactions generate formic acid and acetic acid. Achieving such a spongy nickel-organic photocatalyst is a critical step toward practical production of high-value multicarbon fuels using solar energy.
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