Photocatalysts Based on Cobalt-Chelating Conjugated Polymers for Hydrogen Evolution from Water
Abstract
Developing photocatalytic systems for water splitting to generate oxygen and hydrogen is one of the biggest chemical challenges in solar energy utilization. In this work, we report the first example of heterogeneous photocatalysts for hydrogen evolution based on in-chain cobalt-chelating conjugated polymers. Two conjugated polymers chelated with earth-abundant cobalt ions were synthesized and found to evolve hydrogen photocatalytically from water. These polymers are designed to combine functions of the conjugated backbone as a light-harvesting antenna and electron-transfer conduit with the in-chain bipyridyl-chelated transition metal centers as catalytic active sites. In addition, these polymers are soluble in organic solvents, enabling effective interactions with the substrates as well as detailed characterization. We also found a polymer-dependent optimal cobalt chelating concentration at which the highest photocatalytic hydrogen production (PHP) activity can be achieved.
Additional Information
© 2016 American Chemical Society. Received: April 13, 2016; Revised: July 10, 2016; Published: July 11, 2016. This work was supported by National Science Foundation (DMR-1263006, LPY) and by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, through Argonne National Laboratory under Contract DE-AC02-06CH11357 through a collaboration with the University of Chicago (UC) and Northwestern University (NU). This work also benefited from the NSF MRSEC at UC. The contribution from NU was supported by the National Science Foundation (DMR-1230217). Author Contributions: L.L. and R.G.H. contributed equally to this work. The authors declare no competing financial interest.Attached Files
Supplemental Material - cm6b01477_si_001.pdf
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Additional details
- Eprint ID
- 86986
- Resolver ID
- CaltechAUTHORS:20180612-081256898
- DMR-1263006
- NSF
- DE-AC02-06CH11357
- Department of Energy (DOE)
- DMR-1230217
- NSF
- Created
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2018-06-12Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field