Efficient Photoelectrochemical Reduction of Carbon Dioxide to Formic Acid: A Functionalized Ionic Liquid as an Absorbent and Electrolyte
Abstract
Abstract Photoelectrochemical (PEC) reduction of carbon dioxide (CO2) is a potential method for production of fuels and chemicals from a C1 feedstock accumulated in the atmosphere. However, the low solubility of CO2 in water, and complicated processes associated with capture and conversion, render CO2 conversion inefficient. A new concept is proposed in which a PEC system is used to capture and convert CO2 into formic acid. The process is assisted by an ionic liquid (1‐aminopropyl‐3‐methylimidazolium bromide) aqueous solution, which functions as an absorbent and electrolyte at ambient temperature and pressure. Within this PEC reduction strategy, the ionic liquid plays a critical role in promoting the conversion of CO2 to formic acid and suppressing the reduction of H2O to H2. At an applied voltage of 1.7 V, the Faradaic efficiency for formic acid production is as high as 94.1 % and the electro‐to‐chemical efficiency is 86.2 %.
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Owing to its controllable and tailorable electrical conductivity and inherent functional groups, biochar could be designed to have photonic, electronic, acoustic, and bio/redox interactions, making it a viable alternative to replace unsustainable solid C-based catalysts.
“Owing to its controllable and tailorable electrical conductivity and inherent functional groups, biochar could be easily designed to have photonic, electronic, acoustic, and bio/redox interactions with other reactive substances, making it a viable alternative to replace unsustainable solid C-based catalysts.250, 251, 252, 253, 254”
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Valuable fuels such as CO, CH4, CH3OH, HCOOH, and C2+ products have been generated through proton-assisted multiple electron-transfer processes.
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From Technologies and perspectives for achieving carbon neutrality (2021) · cites this paper as [309]
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- Authors
- Lu, W., Jia, B., Cui, B., Zhang, Y., Yao, K., Zhao, Y., & Wang, J.
- Affiliations
- Henan University of Science and Technology (CN)
- Henan Normal University (CN)
- Corresponding author
- Wang, Jianji
- Venue
- Angewandte Chemie International Edition
- Publisher
- Wiley
- Published
- 2017-08-18
- Volume
- 56
- Issue
- 39
- Pages
- 11851-11854
- ISSN
- 1433-7851 (ISSN-L)
- 1521-3773
- OpenAlex
- W2737352045
- Cited by
- 120
- References
- 48
- Citations by year
- 2026: 5 · 2025: 8 · 2024: 9 · 2023: 12 · 2022: 15 · 2021: 28 · 2020: 23 · 2019: 8 · 2018: 12
- FWCI
- 3.14
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Angewandte Chemie International Edition (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China (CN) (21673067, 21673068, U1504213)
- National Key Research and Development Program of China (CN) (2017YFA0403101)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
- Physical Sciences › Chemical Engineering › Process Chemistry and Technology › Carbon dioxide utilization in catalysis
- Keywords
- photoelectrochemical CO2 reduction, formate production, ionic liquid electrolyte, CO2 absorbents, aqueous ionic liquid solutions, Faradaic efficiency
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