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Photocatalysts Based on Cobalt-Chelating Conjugated Polymers for Hydrogen Evolution from Water

Li, Lianwei and Hadt, Ryan G. and Yao, Shiyu and Lo, Wai-Yip and Cai, Zhengxu and Wu, Qinghe and Pandit, Bill and Chen, Lin X. and Yu, Luping (2016) Photocatalysts Based on Cobalt-Chelating Conjugated Polymers for Hydrogen Evolution from Water. Chemistry of Materials, 28 (15). pp. 5394-5399. ISSN 0897-4756. doi:10.1021/acs.chemmater.6b01477.

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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.

Item Type:Article
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URLURL TypeDescription Information
Hadt, Ryan G.0000-0001-6026-1358
Chen, Lin X.0000-0002-8450-6687
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.
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC02-06CH11357
Issue or Number:15
Record Number:CaltechAUTHORS:20180612-081256898
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Official Citation:Photocatalysts Based on Cobalt-Chelating Conjugated Polymers for Hydrogen Evolution from Water. Lianwei Li, Ryan G. Hadt, Shiyu Yao, Wai-Yip Lo, Zhengxu Cai, Qinghe Wu, Bill Pandit, Lin X. Chen, and Luping Yu Chemistry of Materials 2016 28 (15), 5394-5399. DOI: 10.1021/acs.chemmater.6b01477
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:86986
Deposited By: Tony Diaz
Deposited On:12 Jun 2018 16:27
Last Modified:15 Nov 2021 20:44

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