Efficient Electroreduction of CO<sub>2</sub> to CH<sub>4</sub> Over Amino Acid‐Modified Copper Under Acidic Conditions
ABSTRACT Electroreduction of CO 2 into CH 4 under acidic conditions is a promising strategy for CO 2 utilization, which allows for high CO 2 conversion efficiency. However, the selectivity of CH 4 is low because the hydrogen evolution reaction is enhanced under acidic conditions. Here, we report that the CO 2 can be efficiently reduced into CH 4 over a Cu catalyst by modifying with a glutamic acid molecule under acidic conditions. The CH 4 Faradaic efficiency can reach 62.9% with a current density of 450 mA cm −2 . Meanwhile, a single‐pass carbon efficiency of 48.1% toward CH 4 is achieved. Experiments revealed that the glutamic acid molecule can enhance the concentration of K + on the surface of Cu, which can suppress the HER and promote CO 2 reduction, resulting in high selectivity of CH 4 under acidic conditions.
Authors
- Yingxuan Liu (ORCID: https://orcid.org/0000-0002-6697-0160)
- Chunjun Chen (ORCID: https://orcid.org/0000-0003-3017-379X)
- Haihong Wu (ORCID: https://orcid.org/0000-0001-6266-8290)
- Yichi Zhang (ORCID: https://orcid.org/0000-0002-5299-2895)
- Min Wang (ORCID: https://orcid.org/0000-0002-6517-4461)
- Zijun Zhang (ORCID: https://orcid.org/0000-0002-2717-5033)
- Shuaiqiang Jia (ORCID: https://orcid.org/0000-0002-3258-6208)
- Mingyuan He
- Buxing Han (ORCID: https://orcid.org/0000-0003-0440-809X)
- Xia Bai
- Yajuan Wan
Institutions
- Beijing National Laboratory for Molecular Sciences (CN)
- East China Normal University (CN)
Publication Details
- Journal
- Carbon and Hydrogen
- Published
- 2025-05-01
- DOI
- https://doi.org/10.1002/cbh2.70005
- Citations
- 3
- Primary Topic
- CO2 Reduction Techniques and Catalysts
- Type
- article
- Field-Weighted Citation Impact
- 1.09
Funders
- National Natural Science Foundation of China
- China Postdoctoral Science Foundation
- National Key Research and Development Program of China
- Fundamental Research Funds for the Central Universities