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  The role of in situ generated morphological motifs and Cu(I) species in C2+ product selectivity during CO2 pulsed electroreduction

Aran-Ais, R. M., Scholten, F., Kunze, S., Rizo Parraga, R., & Roldan Cuenya, B. (2020). The role of in situ generated morphological motifs and Cu(I) species in C2+ product selectivity during CO2 pulsed electroreduction. Nature Energy, 5, 317-325. doi:10.1038/s41560-020-0594-9.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-2176-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-2265-2
Genre: Journal Article

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 Creators:
Aran-Ais, Rosa Maria1, Author              
Scholten, Fabian1, Author              
Kunze, Sebastian1, Author              
Rizo Parraga, Rubén1, Author              
Roldan Cuenya, Beatriz1, Author              
Affiliations:
1Interface Science, Fritz Haber Institute, Max Planck Society, ou_2461712              

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 Abstract: The efficient electrochemical conversion of CO2 provides a route to fuels and feedstocks. Copper catalysts are well-known to be selective to multicarbon products, although the role played by the surface architecture and the presence of oxides is not fully understood. Here we report improved efficiency towards ethanol by tuning the morphology and oxidation state of the copper catalysts through pulsed CO2 electrolysis. We establish a correlation between the enhanced production of C2+ products (76% ethylene, ethanol and n-propanol at −1.0 V versus the reversible hydrogen electrode) and the presence of (100) terraces, Cu2O and defects on Cu(100). We monitored the evolution of the catalyst morphology by analysis of cyclic voltammetry curves and ex situ atomic force microscopy data, whereas the chemical state of the surface was examined via quasi in situ X-ray photoelectron spectroscopy. We show that the continuous regeneration of defects and Cu(i) species synergistically favours C–C coupling pathways.

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Language(s): eng - English
 Dates: 2019-04-042020-02-272020-03-30
 Publication Status: Published online
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1038/s41560-020-0594-9
 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: Nature Energy
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: 9 Volume / Issue: 5 Sequence Number: - Start / End Page: 317 - 325 Identifier: ISSN: 2058-7546
CoNE: https://pure.mpg.de/cone/journals/resource/2058-7546