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Selective CO2 Electroreduction to Ethylene and Multicarbon Alcohols via Electrolyte-Driven Nanostructuring.

ABSTRACT: Production of multicarbon products (C2+ ) from CO2 electroreduction reaction (CO2 RR) is highly desirable for storing renewable energy and reducing carbon emission. The electrochemical synthesis of CO2 RR 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.

SUBMITTER: Gao D 

PROVIDER: S-EPMC6899694 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature

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Selective CO<sub>2</sub> Electroreduction to Ethylene and Multicarbon Alcohols via Electrolyte-Driven Nanostructuring.

Gao Dunfeng D   Sinev Ilya I   Scholten Fabian F   Arán-Ais Rosa M RM   Divins Nuria J NJ   Kvashnina Kristina K   Timoshenko Janis J   Roldan Cuenya Beatriz B  

Angewandte Chemie (International ed. in English) 20191008 47

Production of multicarbon products (C<sub>2+</sub> ) from CO<sub>2</sub> electroreduction reaction (CO<sub>2</sub> RR) is highly desirable for storing renewable energy and reducing carbon emission. The electrochemical synthesis of CO<sub>2</sub> RR catalysts that are highly selective for C<sub>2+</sub> products via electrolyte-driven nanostructuring is presented. Nanostructured Cu catalysts synthesized in the presence of specific anions selectively convert CO<sub>2</sub> into ethylene and multic  ...[more]

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