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Operando-guided bicarbonate electroreduction to multicarbon products in cation exchange membrane electrolyzers

Objective

In response to the EU Green Deal’s goal of achieving climate neutrality by 2050, efficient carbon capture and utilization (CCU) technologies are urgently needed to close the carbon cycle. Direct bicarbonate electroreduction (BER) is a promising approach because it can circumvent the energy-intensive, thermal CO2 regeneration step in conventional CO2 electroreduction combined with alkaline liquid-based carbon capture technology. Copper electrode materials can drive the direct conversion of the liquid captured carbon towards valuable multicarbon products, yet the process still suffers from limited activity and selectivity. In addition, current BER electrolyzer designs require high cell voltages, largely because of the immature bipolar membrane technology which causes significant energy losses through water dissociation. As a result, achieving energy-efficient conversion of bicarbonate into multicarbon products remains a critical unsolved challenge.
This project introduces a new electrolyzer configuration based on the established cation exchange membrane (CEM) technology combined with surface-modified oxide-derived copper electrodes to enable efficient bicarbonate-to-multicarbon conversion. Operando Raman and in situ synchrotron X-ray spectroscopy will directly track interfacial properties suitable as activity and selectivity descriptors, including local pH, adsorbed surface species, and Cu oxidation states under industrially relevant conditions. These insights will guide a multi-scale optimization strategy across catalyst chemistry, electrolyte composition, and membrane–electrode microenvironment, establishing a mechanism-driven framework with transferable principles for advancing bicarbonate electrolysis. By overcoming the combined challenges of low reactivity and high energy demand, the project will provide a viable pathway for direct CO2 utilization, contribute to Europe’s leadership in sustainable catalysis, and directly support the EU’s net-zero agenda.

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Keywords

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Programme(s)

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Topic(s)

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Funding Scheme

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HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

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(opens in new window) HORIZON-MSCA-2025-PF

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Coordinator

MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 217 965,12
Address
HOFGARTENSTRASSE 8
80539 MUNCHEN
Germany

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Region
Bayern Oberbayern München, Kreisfreie Stadt
Activity type
Research Organisations
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Total cost

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