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Cited by 230

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Beyond the catalyst: How electrode and reactor design determine the product spectrum during electrochemical CO2 reduction

Open access
Vennekoetter, Jan-Bernd, Sengpiel, Robert, Wessling, Matthias·2019·Chemical Engineering Journal

Abstract

As a remedy to the increasing concentration of greenhouse gases and depleting fossil resources, the electrochemical CO2 reduction closes the carbon cycle and provides an alternative carbon feedstock to the chemical and energy industry. While most contemporary research focuses on the catalyst activity, we emphasize the importance of the reactor design for an energetic efficient (EE) conversion. A design strategy for an electrochemical membrane reactor reducing CO2 to hydrogen, carbon monoxide (CO) and ethylene (C2H4) is developed. We present the stepwise development from an H-cell like setup using full-metal electrodes to a cell with gas diffusion electrodes (GDE) towards high current efficiencies (CE) at high current densities (CD). At 300 mA.cm−2 a CO-CE of 56% for a Ag GDE and a C2H4-CE of 94% for a Cu GDE are measured. The incorporation of the developed GDEs into a zero-gap assembly eliminates ohmic losses and maximizes EE, however the acidic environment of the ion exchange membrane inhibits CO2 reduction. As a compromise a thin liquid buffer layer between cathode and membrane is a prerequisite for a highly active conversion. We demonstrate that industrial relevant CDs with high CEs and EEs can only be achieved by moving beyond today’s research form catalyst development only to an integrated reactor design, which allows to exploit the viable potential of electrochemical CO2 reduction catalysts.

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Metadata

Authors
Vennekoetter, J.-B., Sengpiel, R., & Wessling, M.
Venue
Chemical Engineering Journal
Publisher
Elsevier BV
Published
2019-05
Volume
364
Pages
89-101
ISSN
1385-8947 (ISSN-L)
OpenAlex
W2909417927
Cited by
230
References
10
FWCI
6.49
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Beyond the catalyst: How electrode and reactor design determine the product spectrum during electrochemical CO2 reduction. https://app.cochat.ai/papers/10.1016/j.cej.2019.01.045
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Vennekoetter, J.-B., Sengpiel, R., & Wessling, M. (2019). Beyond the catalyst: How electrode and reactor design determine the product spectrum during electrochemical CO2 reduction. Chemical Engineering Journal. https://doi.org/10.1016/j.cej.2019.01.045

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.