Improved CO2 reduction activity towards C2+ alcohols on a tandem gold on copper electrocatalyst

Morales‐Guio, Carlos G.; Cave, Etosha R.; Nitopi, Stephanie A.; Feaster, Jeremy T.; Wang, Lei; Kuhl, Kendra P.; Jackson, Ariel; Johnson, Nathalie Weier; Abram, David N.; Hatsukade, Toru; Hahn, Christopher; Jaramillo, Thomas F.

doi:10.1038/s41929-018-0139-9

Cited by 582 publications

(532 citation statements)

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“…The comprehensive mechanism of CO 2 or CO electroreduction to C 2 species might vary directly with the exposed facets, solvents, and other factors . In the previously reported work, the authors suggest that the trends in alcohol production originate from CO 2 following a tandem catalysis mechanism, where Au NPs reduces CO 2 to CO near the Cu surface, driving by a high CO coverage, and the Cu surface further reduces CO to alcohols. The dominant morphological features of the Au/Cu catalyst prepared by a physical vapor deposition method can be described as Au NPs on top of a polycrystalline Cu foil.…”

Section: Resultsmentioning

confidence: 91%

AuCu Alloy Nanoparticle Embedded Cu Submicrocone Arrays for Selective Conversion of CO₂ to Ethanol

Shen

Peng

Song

et al. 2019

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The CO2 reduction reaction (CO2RR) driven by renewable electricity represents a promising strategy toward alleviating the energy shortage and environmental crisis facing humankind. Cu species, as one type of versatile electrocatalyst for the CO2RR, attract tremendous research interest. However, for C2 products, ethanol formation is commonly less favored over Cu electrocatalysts. Herein, AuCu alloy nanoparticle embedded Cu submicrocone arrays (AuCu/Cu‐SCA) are constructed as an active, selective, and robust electrocatalyst for the CO2RR. Enhanced selectivity for EtOH is gained, whose Faradaic efficiency (FE) reaches 29 ± 4%, while ethylene formation is relatively inhibited (16 ± 4%) in KHCO3 aqueous solution. The ratio between partial current densities of EtOH and C2H4 (jEtOH/jC2H4) can be tuned in the range from 0.15 ± 0.27 to 1.81 ± 0.55 by varying the Au content of the electrocatalysts. The combined experimental and theoretical calculation results identify the importance of Au in modifying binding energies of key intermediates, such as CH2CHO*, CH3CHO*, and CH3CH2O*, which consequently modify the activity and selectivity (jEtOH/jC2H4) for the CO2RR. Moreover, AuCu/Cu‐SCA also shows high durability with both the current density and FEEtOH being largely maintained for 24 h electrocatalysis.

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Section: Resultsmentioning

confidence: 91%

AuCu Alloy Nanoparticle Embedded Cu Submicrocone Arrays for Selective Conversion of CO₂ to Ethanol

Shen

Peng

Song

et al. 2019

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“…Morales‐Guio et al. improved alcohols generation on polycrystalline Cu foil at low overpotentials via introducing CO‐selective Au nanoparticles . During the CDRR on this bimetallic Au/Cu (Figure g–i), the authors suggested the CO generated on Au sites transferring to Cu sites and further reduced to alcohols there, leading to 100‐times enhancement of C2+ production rate than single Cu at low overpotentials.…”

Section: Recent Progress Towards Practical Electrochemical Co2 Splittingmentioning

confidence: 99%

“…f) Computed CO, C2, and C3 concentration (color) and flux distribution (arrows) on the cavity confinement structure. Tandem Au on Cu (Au/Cu) catalyst: Reproduced from Ref. [129] with permission.…”

Section: Recent Progress Towards Practical Electrochemical Co2 Splittingmentioning

confidence: 99%

Electrochemical Carbon Dioxide Splitting

Xie

Huang

et al. 2019

ChemElectroChem

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To realize renewable energy storage with a reduced carbon footprint for replacing fossil fuel and closing the unbalanced carbon cycle, electrochemical CO 2 splitting, commonly containing aqueous CO 2 reduction and water oxidation as core reactions, has received booming interest for its unique ability to produce chemicals and fuels from CO 2 powered by renewable electricity. In this Review, recent progress of electrochemical CO 2 splitting from a fundamental understanding to practical control of the main performance index, including production rate, product selectivity, and energetic efficiency, is discussed with the highlight of the methodologies used to increase CO 2 supply in water media and active site design. The roles of the main components in electrochemical CO 2 splitting devices, such as catalyst, electrode, electrolyzer, membrane, and electrolyte, are discussed. Finally, we also provide personal perspectives to highlight the opportunities to overcome low stability and limited selectivity for practical electrochemical CO 2 splitting.[a] Dr.

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“…[5] Some excellent techniques were previously developed to enable product determination with improved temporal/ potential resolution. Thegreat advantage of these techniques is that they allow quantification in terms of reaction rate,y ield, selectivity,orfaradaic efficiency.However, they are limited to atemporal resolution in the range of 10-15 minutes,owing to either periodic sampling or the duration of the sample analysis.H ence,t hese methods are used for steady-state electrolysis,w here they led to great advances in complex, multi-product electrochemical reactions such as the CO 2 RR.…”

mentioning

confidence: 99%

Electrochemical Real‐Time Mass Spectrometry (EC‐RTMS): Monitoring Electrochemical Reaction Products in Real Time

et al. 2019

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Improved CO2 reduction activity towards C2+ alcohols on a tandem gold on copper electrocatalyst

Cited by 582 publications

References 54 publications

AuCu Alloy Nanoparticle Embedded Cu Submicrocone Arrays for Selective Conversion of CO₂ to Ethanol

AuCu Alloy Nanoparticle Embedded Cu Submicrocone Arrays for Selective Conversion of CO₂ to Ethanol

Electrochemical Carbon Dioxide Splitting

Electrochemical Real‐Time Mass Spectrometry (EC‐RTMS): Monitoring Electrochemical Reaction Products in Real Time

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Improved CO2 reduction activity towards C2+ alcohols on a tandem gold on copper electrocatalyst

Cited by 582 publications

References 54 publications

AuCu Alloy Nanoparticle Embedded Cu Submicrocone Arrays for Selective Conversion of CO2 to Ethanol

AuCu Alloy Nanoparticle Embedded Cu Submicrocone Arrays for Selective Conversion of CO2 to Ethanol

Electrochemical Carbon Dioxide Splitting

Electrochemical Real‐Time Mass Spectrometry (EC‐RTMS): Monitoring Electrochemical Reaction Products in Real Time

Contact Info

Product

Resources

About

AuCu Alloy Nanoparticle Embedded Cu Submicrocone Arrays for Selective Conversion of CO₂ to Ethanol

AuCu Alloy Nanoparticle Embedded Cu Submicrocone Arrays for Selective Conversion of CO₂ to Ethanol