Low-Overpotential Electroreduction of Carbon Monoxide Using Copper Nanowires

Raciti, David; Cao, Liang; Livi, Kenneth J. T.; Rottmann, Paul F.; Tang, Xin; Li, Chenyang; Hicks, Zachary; Bowen, Kit H.; Hemker, Kevin J.; Mueller, Tim; Wang, Chao

doi:10.1021/acscatal.7b01124

Cited by 150 publications

(167 citation statements)

References 37 publications

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“…A few recent studies have reported high selectivity for direct CO 2 R to methanol (47-49), and further evaluation may yield valuable design principles for electrocatalytic systems that can accomplish a direct synthesis. Alternatively, a number of recent studies have reported high selectivity for direct CO 2 R and carbon monoxide reduction (COR) to ethanol, and lower but nonnegligible selectivity to n-propanol (50)(51)(52)(53)(54)(55).…”

Section: Direct Electrochemical Conversion Of Co 2 To Alcoholsmentioning

confidence: 99%

What would it take for renewably powered electrosynthesis to displace petrochemical processes?

Luna

Hahn

Higgins

et al. 2019

Science

2,040

1,269

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Electrocatalytic transformation of carbon dioxide (CO2) and water into chemical feedstocks offers the potential to reduce carbon emissions by shifting the chemical industry away from fossil fuel dependence. We provide a technoeconomic and carbon emission analysis of possible products, offering targets that would need to be met for economically compelling industrial implementation to be achieved. We also provide a comparison of the projected costs and CO2 emissions across electrocatalytic, biocatalytic, and fossil fuel–derived production of chemical feedstocks. We find that for electrosynthesis to become competitive with fossil fuel–derived feedstocks, electrical-to-chemical conversion efficiencies need to reach at least 60%, and renewable electricity prices need to fall below 4 cents per kilowatt-hour. We discuss the possibility of combining electro- and biocatalytic processes, using sequential upgrading of CO2 as a representative case. We describe the technical challenges and economic barriers to marketable electrosynthesized chemicals.Science, this issue p. eaav3506

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Section: Direct Electrochemical Conversion Of Co 2 To Alcoholsmentioning

confidence: 99%

What would it take for renewably powered electrosynthesis to displace petrochemical processes?

Luna

Hahn

Higgins

et al. 2019

Science

2,040

1,269

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show abstract

“…Polycrystalline Cu also results in the exposure of high index facets which also show increased selectivity for C2+ products. [23][24][25][26][27] XRD patterns ( Figure 1d conditions. During this period of time EIS measurements were taken to determine the cell resistance, and it was found over the course of an hour that the OCV typically changed from -0.2 V to -1.0 V, while the cell resistance reduced from ~30 Ω to ~4 Ω at equilibration due to wetting of the anion exchange membrane ( Figure S6).…”

Section: Resultsmentioning

confidence: 99%

A Hybrid Catalyst-Bonded Membrane Device for Electrochemical Carbon Monoxide Reduction at Different Relative Humidities

Sullivan

Han

Lee

et al. 2019

ACS Sustainable Chem. Eng.

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A hybrid catalyst-bonded membrane device using gaseous reactants for a carbon monoxide reduction (COR) reaction in the cathode chamber, an aqueous electrolyte for an oxygen evolution reaction (OER) in the anode chamber, and an anion exchange membrane (AEM) for product separation was modeled, constructed, and tested. The Cu electrocatalyst was electrodeposited onto gas diffusion layers (GDLs) and was directly bonded to AEM by mechanical pressing in the hybrid device. The impacts of relative humidity at the cathode inlet on the selectivity and activity of COR were investigated by computational modeling and experimental methods. At a relative humidity of 30%, the Cu-based catalyst in the hybrid device exhibited a total operating current density of 87 mA cm–2 with a −2.0 V vs Ag/AgCl reference electrode, a Faradaic efficiency (FE) for C2H4 generation of 32.6%, and an FE for a liquid-based carbon product of 42.6%. Significant improvements in the partial current densities for COR were observed in relation to planar electrodes or flooded gas diffusion electrodes (GDEs). In addition, a custom test bed was constructed to characterize the oxidation states of the Cu catalysts in real time along with product analysis though the backside of the GDLs via operando X-ray absorption (XAS) measurements.

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“…Since the reported CVs for example for Cu(1 0 0) differ strongly one from another (see Figure ). Therefore a direct comparison of the CVs recorded on complex Cu(poly) materials with literature data of Cu( hkl ) is not straightforward …”

Section: Discussionmentioning

confidence: 99%

Polycrystalline and Single‐Crystal Cu Electrodes: Influence of Experimental Conditions on the Electrochemical Properties in Alkaline Media

Engstfeld

Maagaard

Horch

et al. 2018

Chemistry A European J

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Single and polycrystalline Cu electrodes serve as model systems for the study of the electroreduction of CO , CO and nitrate, or for corrosion studies; even so, there are very few reports combining electrochemical measurements with structural characterization. Herein both the electrochemical properties of polycrystalline Cu and single crystal Cu(1 0 0) electrodes in alkaline solutions (0.1 m KOH and 0.1 m NaOH) are investigated. It is demonstrated that the pre-treatment of the electrodes plays a crucial role in determining their electrochemical properties. Scanning tunneling microscopy, X-ray photoelectron spectroscopy and cyclic voltammetry are performed on Cu(1 0 0) electrodes prepared under UHV conditions; it is shown that the electrochemical properties of these atomically well-defined electrodes are distinct from electrodes prepared by other methods. Also highlighted is the significant role of residual oxygen and electrolyte convection in influencing the electrochemical properties.

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Low-Overpotential Electroreduction of Carbon Monoxide Using Copper Nanowires

Cited by 150 publications

References 37 publications

What would it take for renewably powered electrosynthesis to displace petrochemical processes?

What would it take for renewably powered electrosynthesis to displace petrochemical processes?

A Hybrid Catalyst-Bonded Membrane Device for Electrochemical Carbon Monoxide Reduction at Different Relative Humidities

Polycrystalline and Single‐Crystal Cu Electrodes: Influence of Experimental Conditions on the Electrochemical Properties in Alkaline Media

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