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  Operando Investigation of Ag‐Decorated Cu2O Nanocube Catalysts with Enhanced CO2 Electroreduction toward Liquid Products

Herzog, A., Bergmann, A., Jeon, H., Timoshenko, J., Kühl, S., Rettenmaier, C., et al. (2021). Operando Investigation of Ag‐Decorated Cu2O Nanocube Catalysts with Enhanced CO2 Electroreduction toward Liquid Products. Angewandte Chemie International Edition, 60(13), 7426-7435. doi:10.1002/anie.202017070.

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 Creators:
Herzog, Antonia1, Author              
Bergmann, Arno1, Author              
Jeon, Hyosang1, Author              
Timoshenko, Janis1, Author              
Kühl, Stefanie1, Author              
Rettenmaier, Clara1, Author              
Lopez-Luna, Mauricio1, Author              
Haase, Felix1, Author              
Roldan Cuenya, Beatriz1, Author              
Affiliations:
1Interface Science, Fritz Haber Institute, Max Planck Society, ou_2461712              

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 Abstract: Direct conversion of carbon dioxide into multicarbon liquid fuels by the CO2 electrochemical reduction reaction (CO2RR) can contribute to the decarbonization of the global economy. Here, well‐defined Cu2O nanocubes (NCs, 35 nm) uniformly covered with Ag nanoparticles (5 nm) were synthesized. When compared to bare Cu2O NCs, the catalyst with 5 at% Ag on Cu2O NCs displayed a two‐fold increase in the Faradaic efficiency for C2+ liquid products (30% at ‐1.0 VRHE), including ethanol, 1‐propanol, and acetaldehyde, while formate and hydrogen were suppressed. Operando X‐ray absorption spectroscopy revealed the partial reduction of Cu2O during CO2RR, accompanied by a reaction‐driven redispersion of Ag on the CuOx NCs. Operando surface‐enhanced Raman spectroscopy data further uncovered significant variations in the CO binding to Cu, which were assigned to Ag‐Cu sites formed during CO2RR that appear crucial for the C‐C coupling and the enhanced yield of liquid products.

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Language(s): eng - English
 Dates: 2020-12-232021-01-142021-01-262021-03-22
 Publication Status: Published in print
 Pages: 10
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/anie.202017070
 Degree: -

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Project name : OPERANDOCAT - In situ and Operando Nanocatalysis: Size, Shape and Chemical State Effects
Grant ID : 725291
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

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Title: Angewandte Chemie International Edition
  Abbreviation : Angew. Chem. Int. Ed.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: 10 Volume / Issue: 60 (13) Sequence Number: - Start / End Page: 7426 - 7435 Identifier: ISSN: 1433-7851
CoNE: https://pure.mpg.de/cone/journals/resource/1433-7851