Print Email Facebook Twitter Cation-Driven Increases of CO2Utilization in a Bipolar Membrane Electrode Assembly for CO2Electrolysis Title Cation-Driven Increases of CO2Utilization in a Bipolar Membrane Electrode Assembly for CO2Electrolysis Author Yang, K. (TU Delft ChemE/Materials for Energy Conversion and Storage) Li, Mengran (TU Delft ChemE/Materials for Energy Conversion and Storage) Subramanian, S.S. (TU Delft ChemE/Materials for Energy Conversion and Storage) Blommaert, M.A. (TU Delft ChemE/Materials for Energy Conversion and Storage) Smith, W.A. (TU Delft ChemE/Materials for Energy Conversion and Storage) Burdyny, T.E. (TU Delft ChemE/Materials for Energy Conversion and Storage) Date 2021 Abstract Advancing reaction rates for electrochemical CO2 reduction in membrane electrode assemblies (MEAs) have boosted the promise of the technology while exposing new shortcomings. Among these is the maximum utilization of CO2, which is capped at 50% (CO as targeted product) due to unwanted homogeneous reactions. Using bipolar membranes in an MEA (BPMEA) has the capability of preventing parasitic CO2 losses, but their promise is dampened by poor CO2 activity and selectivity. In this work, we enable a 3-fold increase in the CO2 reduction selectivity of a BPMEA system by promoting alkali cation (K+) concentrations on the catalyst's surface, achieving a CO Faradaic efficiency of 68%. When compared to an anion exchange membrane, the cation-infused bipolar membrane (BPM) system shows a 5-fold reduction in CO2 loss at similar current densities, while breaking the 50% CO2 utilization mark. The work provides a combined cation and BPM strategy for overcoming CO2 utilization issues in CO2 electrolyzers. To reference this document use: http://resolver.tudelft.nl/uuid:c62ea45a-a54d-4f40-8ee7-5af4bd4d5af1 DOI https://doi.org/10.1021/acsenergylett.1c02058 ISSN 2380-8195 Source ACS Energy Letters, 6 (12), 4291-4298 Part of collection Institutional Repository Document type journal article Rights © 2021 K. Yang, Mengran Li, S.S. Subramanian, M.A. Blommaert, W.A. Smith, T.E. Burdyny Files PDF acsenergylett.1c02058.pdf 3.53 MB Close viewer /islandora/object/uuid:c62ea45a-a54d-4f40-8ee7-5af4bd4d5af1/datastream/OBJ/view