Effect for CO<sub>2</sub> reduction of zero-gap reactor by adding formic acid to low concentration alkaline metal bicarbonate (KHCO<sub>3</sub>) anolyte
Abstract CO 2 reduction reaction (CO 2 RR) using a zero-gap reactor is attractive and is an attractive technology that is gaining attention for its potential to achieve carbon negativity. When using an anion exchange membrane for CO 2 RR, the pH of the anolyte solution changes due to the migration of acids produced in the cathode with the migration of alcohols, HCO 3 − , CO 3 2− , and OH − also produced in the cathode. In addition, the alkali metal cations (K + ) concentration decreases in the anolyte, which is also observed with the K + migration from the anode to the cathode by electroosmosis. We evaluated this change by varying the KHCO 3 and formic acid concentrations. The results will help us to identify problems and improve the reaction.
Authors
- Kazuki Koike
- Takeharu Murakami (ORCID: https://orcid.org/0000-0003-2668-4896)
- Takeshi Matsumoto (ORCID: https://orcid.org/0000-0002-1517-0761)
- Katsushi Fujii (ORCID: https://orcid.org/0000-0002-9022-9858)
- Takayo Ogawa
- Satoshi Wada (ORCID: https://orcid.org/0000-0002-5547-7434)
- Kei Morishita (ORCID: https://orcid.org/0000-0002-0250-2800)
Institutions
- Nippon Soken (Japan) (JP)
- RIKEN (JP)
- RIKEN Center for Advanced Photonics (JP)
Publication Details
- Journal
- Japanese Journal of Applied Physics
- Published
- 2025-04-01
- DOI
- https://doi.org/10.35848/1347-4065/adca40
- Citations
- 1
- Primary Topic
- Carbon dioxide utilization in catalysis
- Type
- article
- Field-Weighted Citation Impact
- 0.70