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AuthorKang U.
AuthorYoon S.H.
AuthorHan D.S.
AuthorPark H.
Available date2020-04-23T14:21:32Z
Publication Date2019
Publication NameACS Energy Letters
ResourceScopus
ISSN23808195
URIhttp://dx.doi.org/10.1021/acsenergylett.9b01281
URIhttp://hdl.handle.net/10576/14322
AbstractThe photocatalytic conversion of CO2 and water into value-added chemicals remains a great challenge. This study shows that uniformly mixed copper and iron oxide (CuO/CuFeO2; CFO) bulky heterojunction films are capable of converting CO2 and water into C1–C6 aliphatic acid anions and O2 at a solar-to-chemical energy conversion (STC) efficiency close to 3% under simulated sunlight in the absence of any sacrificial chemicals or electrical biases. When the CFO film is simply wired to a Pt foil, C1 (formate, with selectivity of 100%) and O2 are produced at a near-stoichiometric ratio at an STC efficiency of ∼5% via the Z-scheme charge transfer mechanism. The CFO films are durable over 1 week and recyclable over 5 weeks under continuous irradiation. The addition of chloride enhances formate production, with an STC efficiency of 10%, while inhibiting the deformation of CFOs. Density functional theory computations support the observed selectivity and durability.
SponsorWe are grateful to the Korea CCS R&D Center (KCRC) (Grant No. 2014M1A8A1049354) for their financial support. This research was partly supported by the National Research Foundation of Korea (2019R1A2C2002602, 2018R1A6A1A03024962, and 2019M1A2A2065616) and the Korea Ministry of Environment as Waste to Energy-Recycling Human Resource Development Project (YL-WE-17-001). The HPC resources and services used in this work were provided by the Research Computing group at Texas A&M University in Qatar. Research Computing was funded by the Qatar Foundation for Education, Science and Community Development ( http://www.qf.org.qa ). This publication was made possible by a grant from the Qatar National Research Fund under its National Priorities Research Program (NPRP 10-1210-160019).
Languageen
PublisherAmerican Chemical Society
SubjectCharge transfer
Platinum
Anions
Solution chemistry
Deposition
TitleSynthesis of Aliphatic Acids from CO2 and Water at Efficiencies Close to the Photosynthesis Limit Using Mixed Copper and Iron Oxide Films
TypeArticle
Pagination2075-2080
Issue Number9
Volume Number4
dc.accessType Abstract Only


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