Operando Investigation of Ag-Decorated Cu 2 O Nanocube Catalysts with Enhanced CO 2 Electroreduction toward Liquid Products.

Autor: Herzog A; Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195, Berlin, Germany., Bergmann A; Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195, Berlin, Germany., Jeon HS; Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195, Berlin, Germany., Timoshenko J; Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195, Berlin, Germany., Kühl S; Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195, Berlin, Germany., Rettenmaier C; Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195, Berlin, Germany., Lopez Luna M; Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195, Berlin, Germany., Haase FT; Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195, Berlin, Germany., Roldan Cuenya B; Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195, Berlin, Germany.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2021 Mar 22; Vol. 60 (13), pp. 7426-7435. Date of Electronic Publication: 2021 Feb 22.
DOI: 10.1002/anie.202017070
Abstrakt: Direct conversion of carbon dioxide into multicarbon liquid fuels by the CO 2 electrochemical reduction reaction (CO 2 RR) can contribute to the decarbonization of the global economy. Here, well-defined Cu 2 O nanocubes (NCs, 35 nm) uniformly covered with Ag nanoparticles (5 nm) were synthesized. When compared to bare Cu 2 O NCs, the catalyst with 5 at % Ag on Cu 2 O NCs displayed a two-fold increase in the Faradaic efficiency for C 2+ liquid products (30 % at -1.0 V RHE ), including ethanol, 1-propanol, and acetaldehyde, while formate and hydrogen were suppressed. Operando X-ray absorption spectroscopy revealed the partial reduction of Cu 2 O during CO 2 RR, accompanied by a reaction-driven redispersion of Ag on the CuO x  NCs. Data from operando surface-enhanced Raman spectroscopy further uncovered significant variations in the CO binding to Cu, which were assigned to Ag-Cu sites formed during CO 2 RR that appear crucial for the C-C coupling and the enhanced yield of liquid products.
(© 2021 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.)
Databáze: MEDLINE
Externí odkaz: