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Electrochemical CO2 Reduction: A Classification Problem

Bagger, Alexander, Ju, Wen, Varela, Ana Sofia, Strasser, Peter, Rossmeisl, Jan·2017·ChemPhysChem

Abstract

In this work, we propose four non‐coupled binding energies of intermediates as descriptors, or “genes”, for predicting the product distribution in CO 2 electroreduction. Simple reactions can be understood by the Sabatier principle (catalytic activity vs. one descriptor), while more complex reactions tend to give multiple very different products and consequently the product selectivity is a more complex property to understand. We approach this, as a logistical classification problem, by grouping metals according to their major experimental product from CO 2 electroreduction: H 2, CO, formic acid and beyond CO* (hydrocarbons or alcohols). We compare the groups in terms of multiple binding energies of intermediates calculated by density functional theory. Here, we find three descriptors to explain the grouping: the adsorption energies of H*, COOH*, and CO*. To further classify products beyond CO*, we carry out formaldehyde experiments on Cu, Ag, and Au and combine these results with the literature to group and differentiate alcohol or hydrocarbon products. We find that the oxygen binding (adsorption energy of CH 3 O*) is an additional descriptor to explain the alcohol formation in reduction processes. Finally, the adsorption energy of the four intermediates, H*, COOH*, CO*, and CH 3 O*, can be used to differentiate, group, and explain products in electrochemical reduction processes involving CO 2, CO, and carbon–oxygen compounds.

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Metadata

Authors
Bagger, A., Ju, W., Varela, A. S., Strasser, P., & Rossmeisl, J.
Venue
ChemPhysChem
Publisher
Wiley
Published
2017-10-19
Volume
18
Issue
22
Pages
3266-3273
ISSN
  • 1439-4235 (ISSN-L)
  • 1439-7641
OpenAlex
W2751014015
Cited by
1,059
References
10
FWCI
8.25
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Electrochemical CO2 Reduction: A Classification Problem. https://app.cochat.ai/papers/10.1002/cphc.201700736
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Bagger, A., Ju, W., Varela, A. S., Strasser, P., & Rossmeisl, J. (2017). Electrochemical CO2 Reduction: A Classification Problem. ChemPhysChem. https://doi.org/10.1002/cphc.201700736

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