Cited by 464CO2 Reduction Techniques and CatalystsCatalysts for Methane ReformingElectrocatalysts for Energy Conversion

Manipulating the Hydrocarbon Selectivity of Copper Nanoparticles in CO 2 Electroreduction by Process Conditions

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Kas, Recep, Kortlever, Ruud, Yılmaz, Hasan, Koper, Marc T. M., Mul, Guido·2015·ChemElectroChem

Abstract

The formation of ethylene in CO 2 electroreduction over rough copper electrodes is often explained by the presence of specific surface crystal steps, edges and defects. We demonstrate that an identical electrode covered with copper nanoparticles can yield either predominantly ethylene or methane, depending on the electrolyte concentration and applied CO 2 pressure. Calculations of the pH near the electrode surface suggest that ethylene formation is favored by a relatively high (local) pH. Furthermore, the conditions leading to the formation of significant amounts of methane result in rapid deterioration of hydrocarbon production rates, whereas electrode performance in conditions favoring ethylene production can be sustained for hours. This study substantially alters the mechanistic interpretation of formation of ethylene over rough copper surfaces and implies that applied process conditions inducing pH variations near the electrode surface need to be taken into consideration.

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  1. B. Kumar, M. Asadi, D. Pisasale, S. Sinha-Ray, B. A. Rosen, R. Haasch, J. Abiade, A. L. Yarin, A. Salehi-Khojin, Nat. Commun. 2013, 4, 2819.
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Authors
Kas, R., Kortlever, R., Yılmaz, H., Koper, M. T. M., & Mul, G.
Affiliations
  • Leiden University (NL)
  • University of Twente (NL)
Corresponding author
Mul, Guido
Venue
ChemElectroChem
Publisher
Wiley
Published
2014-12-09
Volume
2
Issue
3
Pages
354-358
ISSN
2196-0216 (ISSN-L)
OpenAlex
W2126497185
Cited by
464
References
46
Citations by year
2026: 17 · 2025: 39 · 2024: 40 · 2023: 32 · 2022: 48 · 2021: 52 · 2020: 49 · 2019: 51 · 2018: 50 · 2017: 44 · 2016: 28 · 2015: 14
FWCI
9.44
Type
journal article
Language
en
Open access
Locations
  • ChemElectroChem (publishedVersion)
  • Leiden Repository (Leiden University) (submittedVersion)
  • University of Twente Research Information (submittedVersion, other-oa)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
  • Physical Sciences › Chemical Engineering › Catalysis › Catalysts for Methane Reforming
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
Keywords
electrochemical CO2 reduction, copper nanoparticles, ethylene production, methane production, hydrocarbon selectivity, surface pH, electrolyte concentration, CO2 pressure, electrode degradation

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