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- Title
Selective CO<sub>2</sub> Electroreduction to Ethylene and Multicarbon Alcohols via Electrolyte‐Driven Nanostructuring.
- Authors
Gao, Dunfeng; Sinev, Ilya; Scholten, Fabian; Arán‐Ais, Rosa M.; Divins, Nuria J.; Kvashnina, Kristina; Timoshenko, Janis; Roldan Cuenya, Beatriz
- Abstract
Production of multicarbon products (C2+) from CO2 electroreduction reaction (CO2RR) is highly desirable for storing renewable energy and reducing carbon emission. The electrochemical synthesis of CO2RR catalysts that are highly selective for C2+ products via electrolyte‐driven nanostructuring is presented. Nanostructured Cu catalysts synthesized in the presence of specific anions selectively convert CO2 into ethylene and multicarbon alcohols in aqueous 0.1 m KHCO3 solution, with the iodine‐modified catalyst displaying the highest Faradaic efficiency of 80 % and a partial geometric current density of ca. 31.2 mA cm−2 for C2+ products at −0.9 V vs. RHE. Operando X‐ray absorption spectroscopy and quasi in situ X‐ray photoelectron spectroscopy measurements revealed that the high C2+ selectivity of these nanostructured Cu catalysts can be attributed to the highly roughened surface morphology induced by the synthesis, presence of subsurface oxygen and Cu+ species, and the adsorbed halides.
- Subjects
GLYCOLS; VINYL acetate; ELECTROLYTIC reduction; X-ray photoelectron spectroscopy; X-ray absorption; X-ray spectroscopy
- Publication
Angewandte Chemie, 2019, Vol 131, Issue 47, p17203
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201910155