Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 336, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2023.122929
Keywords
Hollow -fiber penetration electrode; Stepwise CO 2 electroreduction; Hierarchical porous structure; Chloride ion regulation
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Efficient C2+ production from CO2 electrocatalytic reduction is achieved using serial Ag and Cu hollow-fiber penetration electrodes, with a partial current density of 1.8 A cm-2 and a faradaic efficiency of 90.5%. The unique penetration effect induced by hierarchical micro/nanostructured hollow fiber configurations and the regulated electronic structures by chloride ion adsorption are responsible for the superior activity. This work provides a facile tactic and encouraging headway in designing efficient CO2 electrocatalytic reduction systems for high-value C2+ chemicals.
Efficient C2+ production from CO2 electrocatalytic reduction exhibits significant promise but suffers from low selectivity and undesired side reactions. Stepwise electroreductions of CO2 to CO and then to C2+ products can benefit from the perfect cooperation of the first high CO production efficiency and the subsequent favorable C-C coupling kinetics of CO. Herein, by virtue of serial Ag and Cu hollow-fiber penetration electrodes, a highefficiency CO2 electroreduction to C2+ products is achieved with a partial current density of 1.8 A cm-2 and a faradaic efficiency of 90.5 %. Experimental results and density functional theory calculations demonstrate that the synergetic combination of unique penetration effect induced by hierarchical micro/nanostructured hollow fiber configurations and regulated electronic structures by chloride ion adsorption, is responsible for the superior activity. This work provides a facile tactic and encouraging headway to design applicable efficient CO2 electrocatalytic reduction systems towards high-value C2+ chemicals.
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