Integrating Sorbents in CO <sub>2</sub> Electroreduction: A Model System to Disentangle Layer Contributions in Membrane Electrode Assemblies
Abstract Membrane electrode assemblies (MEAs) are crucial in high‐performance CO 2 electrolysis, reducing iR losses and overcoming low solubility issues by supplying CO 2 in the gas form. However, liquid anolyte permeation to the cathode causes salt precipitation, stability issues, and parasitic H 2 evolution, hindering industrial implementation. Full gas‐phase operation could mitigate these problems, but a model system to study gas‐phase concepts is lacking. This study presents a planar bimetallic interdigitated electrode array (BIDEA) as a model system, using a sorbent electrolyte for CO 2 electroreduction as a case study. The simplified system, combined with numerical models, reveals key process limitations, such as diffusion over the material and the role of sorption kinetics in limiting CO 2 supply to the cathode. Spectroscopic analysis provided mechanistic insights, demonstrating the model system's applicability to disentangle layer effects in integrated systems.
Authors
- Martijn J.W. Blom (ORCID: https://orcid.org/0000-0002-4350-7085)
- Philippe M. Vereecken (ORCID: https://orcid.org/0000-0003-4115-0075)
- Sukhvinder Singh (ORCID: https://orcid.org/0000-0003-1985-0534)
- Alan C. West (ORCID: https://orcid.org/0000-0002-9934-0034)
- Marieke van Leeuwen (ORCID: https://orcid.org/0000-0002-5708-9224)
Institutions
- Directorate-General for Energy (BE)
- IMEC (BE)
- Columbia University (US)
- KU Leuven (BE)
Publication Details
- Journal
- Angewandte Chemie
- Published
- 2025-11-17
- DOI
- https://doi.org/10.1002/ange.202513104
- Primary Topic
- CO2 Reduction Techniques and Catalysts
- Type
- article
- Field-Weighted Citation Impact
- 0.00