Journal
CHEMSUSCHEM
Volume 8, Issue 22, Pages 3853-3858Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201500958
Keywords
carbon dioxide; direct formate fuel cell; formate oxidation; liquid fuel; reduction
Funding
- Petroleum Research Fund (PRF) [53133-UNI5]
- California State University, Fullerton
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We demonstrate the first device to our knowledge that uses a solar panel to power the electrochemical reduction of dissolved carbon dioxide (carbonate) into formate that is then used in the same device to operate a direct formate fuel cell (DFFC). The electrochemical reduction of carbonate is carried out on a Sn electrode in a reservoir that maintains a constant carbon balance between carbonate and formate. The electron-rich formate species is converted by the DFFC into electrical energy through electron release. The product of DFFC operation is the electron-deficient carbonate species that diffuses back to the reservoir bulk. It is possible to continuously charge the device using alternative energy (e.g., solar) to convert carbonate to formate for on-demand use in the DFFC; the intermittent nature of alternative energy makes this an attractive design. In this work, we demonstrate a proof-of-concept device that performs reduction of carbonate, storage of formate, and operation of a DFFC.
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