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High-Flux Solar-Driven Thermochemical Dissociation of CO_2 and H_2O Using Nonstoichiometric Ceria

Chueh, William C. and Falter, Christoph and Abbott, Mandy and Scipio, Danien and Furler, Philipp and Haile, Sossina M. and Steinfeld, Aldo (2010) High-Flux Solar-Driven Thermochemical Dissociation of CO_2 and H_2O Using Nonstoichiometric Ceria. Science, 330 (6012). pp. 1797-1801. ISSN 0036-8075.

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Because solar energy is available in large excess relative to current rates of energy consumption, effective conversion of this renewable yet intermittent resource into a transportable and dispatchable chemical fuel may ensure the goal of a sustainable energy future. However, low conversion efficiencies, particularly with CO_2 reduction, as well as utilization of precious materials have limited the practical generation of solar fuels. By using a solar cavity-receiver reactor, we combined the oxygen uptake and release capacity of cerium oxide and facile catalysis at elevated temperatures to thermochemically dissociate CO_2 and H_2O, yielding CO and H_2, respectively. Stable and rapid generation of fuel was demonstrated over 500 cycles. Solar-to-fuel efficiencies of 0.7 to 0.8% were achieved and shown to be largely limited by the system scale and design rather than by chemistry.

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Haile, Sossina M.0000-0002-5293-6252
Additional Information:© 2010 American Association for the Advancement of Science. Received 15 September 2010; accepted 23 November 2010. This work was funded in part by NSF (CBET-0829114), the Initiative for Renewable Energy and the Environment (under subcontract from the University of Minnesota), and the Swiss National Science Foundation (contract no. 200021-126512). Additional travel support was provided by the International Materials Institutes program of NSF under award no. DMR 08-43934. We thank the technical staff of the Solar Technology Laboratory of the Paul Scherrer Institute for supporting the experimental activities at the High-Flux Solar Simulator. W.C.C. designed the experiments, and C.F. designed the solar reactor. Samples were prepared by M.A. and D.S. W.C.C, C.F., P.F., and D.S. executed the experiments. S.M.H. and A.S. supervised the project.
Funding AgencyGrant Number
NSFDMR 08-43934
University of Minnesota, Initiative for Renewable Energy and the EnvironmentUNSPECIFIED
Swiss National Science Foundation200021-126512
Issue or Number:6012
Record Number:CaltechAUTHORS:20110103-111011614
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Official Citation:Chueh, W. C., C. Falter, et al. (2010). "High-Flux Solar-Driven Thermochemical Dissociation of CO2 and H2O Using Nonstoichiometric Ceria." Science 330(6012): 1797-1801.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21543
Deposited By: Tony Diaz
Deposited On:25 Jan 2011 21:47
Last Modified:03 Oct 2019 02:25

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