AI Article Synopsis
- - The electroreduction of CO into multicarbon products (C) is a promising method for renewable energy storage and carbon emission reduction, focusing on developing selective catalysts.
- - Researchers synthesized nanostructured copper (Cu) catalysts that convert CO into ethylene and multicarbon alcohols with up to 80% Faradaic efficiency in a specific electrolyte solution at -0.9 V vs. RHE.
- - Advanced spectroscopic techniques demonstrated that the high selectivity of these catalysts is due to their rough surface, subsurface oxygen and copper species, and the presence of adsorbed halides.
Article Abstract
Production of multicarbon products (C ) from CO electroreduction reaction (CO RR) is highly desirable for storing renewable energy and reducing carbon emission. The electrochemical synthesis of CO RR catalysts that are highly selective for C products via electrolyte-driven nanostructuring is presented. Nanostructured Cu catalysts synthesized in the presence of specific anions selectively convert CO into ethylene and multicarbon alcohols in aqueous 0.1 m KHCO 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 for C 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 C 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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6899694 | PMC |
| http://dx.doi.org/10.1002/anie.201910155 | DOI Listing |
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