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  Revealing the Active Phase of Copper during the Electroreduction of CO2 in Aqueous Electrolyte by Correlating In Situ X-ray Spectroscopy and In Situ Electron Microscopy

Velasco Velez, J., Mom, R., Sandoval Diaz, L., Falling, L., Chuang, C.-H., Gao, D., et al. (2020). Revealing the Active Phase of Copper during the Electroreduction of CO2 in Aqueous Electrolyte by Correlating In Situ X-ray Spectroscopy and In Situ Electron Microscopy. ACS Energy Letters, 5(6), 2106-2111. doi:10.1021/acsenergylett.0c00802.

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 Creators:
Velasco Velez, Juan1, 2, Author           
Mom, Rik2, Author           
Sandoval Diaz, Luis2, Author           
Falling, Lorenz2, Author           
Chuang, Cheng-Hao3, Author
Gao, Dunfeng4, 5, Author           
Jones, Travis2, Author           
Zhu, Qingjun1, 2, Author           
Arrigo, Rosa6, Author
Roldan Cuenya, Beatriz4, Author           
Knop-Gericke, Axel1, 2, Author           
Lunkenbein, Thomas2, Author           
Schlögl, Robert1, 2, Author           
Affiliations:
1Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion, Mülheim an der Ruhr 45470, Germany., ou_persistent22              
2Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
3Department of Physics, Tamkang University, New Taipei City 25137, Taiwan., ou_persistent22              
4Interface Science, Fritz Haber Institute, Max Planck Society, ou_2461712              
5State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, China, ou_persistent22              
6School of Science, Engineering and Environment, University of Salford, 314 Cockcroft building, M5 4 WT, Manchester, U.K., ou_persistent22              

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 Abstract: The variation in the morphology and electronic structure of copper during the electroreduction of CO2 into valuable hydrocarbons and alcohols was revealed by combining in situ surface- and bulk-sensitive X-ray spectroscopies with electrochemical scanning electron microscopy. These experiments proved that the electrified interface surface and near-surface are dominated by reduced copper. The selectivity to the formation of the key C–C bond is enhanced at higher cathodic potentials as a consequence of increased copper metallicity. In addition, the reduction of the copper oxide electrode and oxygen loss in the lattice reconstructs the electrode to yield a rougher surface with more uncoordinated sites, which controls the dissociation barrier of water and CO2. Thus, according to these results, copper oxide species can only be stabilized kinetically under CO2 reduction reaction conditions.

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Language(s): eng - English
 Dates: 2020-04-132020-05-272020-05-272020-06-12
 Publication Status: Published in print
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acsenergylett.0c00802
 Degree: -

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Project name : OPERANDOCAT - In situ and Operando Nanocatalysis: Size, Shape and Chemical State Effects
Grant ID : 725915
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

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Title: ACS Energy Letters
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: 6 Volume / Issue: 5 (6) Sequence Number: - Start / End Page: 2106 - 2111 Identifier: ISSN: 2380-8195
CoNE: https://pure.mpg.de/cone/journals/resource/2380-8195