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Title: Acetaldehyde as an intermediate in the electroreduction of carbon monoxide to ethanol on oxide-derived copper

Journal Article · · Angewandte Chemie (International Edition)

Oxide-derived copper (OD-Cu) electrodes exhibit unprecedented CO reduction performance towards liquid fuels, producing ethanol and acetate with >50 % Faradaic efficiency at -0.3 V (vs. RHE). By using static headspace-gas chromatography for liquid phase analysis, we identify acetaldehyde as a minor product and key intermediate in the electroreduction of CO to ethanol on OD-Cu electrodes. Acetaldehyde is produced with a Faradaic efficiency of ≈5 % at -0.33 V (vs. RHE). We show that acetaldehyde forms at low steady-state concentrations, and that free acetaldehyde is difficult to detect in alkaline solutions using NMR spectroscopy, requiring alternative methods for detection and quantification. Our results indicate an important step towards understanding the CO reduction mechanism on OD-Cu electrodes.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1240104
Journal Information:
Angewandte Chemie (International Edition), Vol. 55, Issue 4; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 143 works
Citation information provided by
Web of Science

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Cited By (33)

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Atomic Layer Deposition of ZnO on CuO Enables Selective and Efficient Electroreduction of Carbon Dioxide to Liquid Fuels journal September 2019
Structure‐Sensitivity and Electrolyte Effects in CO 2 Electroreduction: From Model Studies to Applications journal June 2019
Understanding the Heterogeneous Electrocatalytic Reduction of Carbon Dioxide on Oxide-Derived Catalysts journal December 2017
Electrochemical CO 2 Reduction: A Classification Problem journal October 2017
Initial Application of Selected-Ion Flow-Tube Mass Spectrometry to Real-Time Product Detection in Electrochemical CO 2 Reduction journal December 2017
Hybrid Cu 0 and Cu x + as Atomic Interfaces Promote High‐Selectivity Conversion of CO 2 to C 2 H 5 OH at Low Potential journal March 2020
AuCu Alloy Nanoparticle Embedded Cu Submicrocone Arrays for Selective Conversion of CO 2 to Ethanol journal June 2019
pH effects on the electrochemical reduction of CO(2) towards C2 products on stepped copper journal January 2019
Formation of carbon–nitrogen bonds in carbon monoxide electrolysis journal August 2019
High-rate electroreduction of carbon monoxide to multi-carbon products journal August 2018
Efficient electrocatalytic conversion of carbon monoxide to propanol using fragmented copper journal February 2019
Rational catalyst and electrolyte design for CO2 electroreduction towards multicarbon products journal March 2019
Designing materials for electrochemical carbon dioxide recycling journal July 2019
Cooperative CO2-to-ethanol conversion via enriched intermediates at molecule–metal catalyst interfaces journal December 2019
Carbon monoxide electroreduction as an emerging platform for carbon utilization journal December 2019
A comparative technoeconomic analysis of pathways for commercial electrochemical CO 2 reduction to liquid products journal January 2018
Cuprous ions embedded in ceria lattice for selective and stable electrochemical reduction of carbon dioxide to ethylene journal January 2018
Establishing new scaling relations on two-dimensional MXenes for CO 2 electroreduction journal January 2018
New aspects of C2 selectivity in electrochemical CO 2 reduction over oxide-derived copper journal January 2020
Surface strategies for catalytic CO 2 reduction: from two-dimensional materials to nanoclusters to single atoms journal January 2019
Solar driven reduction of CO 2 using Pt–Cu/C as a catalyst in a photoelectrochemical cell: experiment and mechanism study journal January 2019
Plasma-activated CoO x nanoclusters supported on graphite intercalation compounds for improved CO 2 electroreduction to formate journal January 2019
Selective reduction of CO to acetaldehyde with CuAg electrocatalysts journal January 2020
Combining theory and experiment in electrocatalysis: Insights into materials design journal January 2017
Reduction of CO 2 to Ethanol on Cu-In/CuInS 2 Composite Thin Film Photocathode journal January 2018
Reactivity of Copper Electrodes towards Functional Groups and Small Molecules in the Context of CO2 Electro-Reductions journal May 2017
A Direct Grain-Boundary-Activity Correlation for CO Electroreduction on Cu Nanoparticles journal March 2016
Supramolecular Porphyrin Cages Assembled at Molecular–Materials Interfaces for Electrocatalytic CO Reduction journal September 2017
Quantitatively Unraveling the Redox Shuttle of Spontaneous Oxidation/Electroreduction of CuO x on Silver Nanowires Using in Situ X-ray Absorption Spectroscopy journal December 2019
Structure- and Potential-Dependent Cation Effects on CO Reduction at Copper Single-Crystal Electrodes journal November 2017