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• W4282841566 endingPage "121619" @default.
• W4282841566 startingPage "121619" @default.
• W4282841566 abstract "Antimony (Sb) as a low-toxic and cost-effective metal is a promising material to catalyse CO 2 electroreduction to formate with practical viability. However, monometallic Sb suffers from intrinsically low catalytic activity and the competing hydrogen evolution. Here, we report nanoporous Sb-Bi alloys for substantially improving the catalytic activity of Sb and suppressing hydrogen evolution. The optimal Sb-Bi alloy exhibits a maximum Faradaic efficiency of 95.8 % toward formate production, surpassing the 11.6 % of monometallic Sb counterpart. Operating the catalyst in the flow cell demonstrates a formate partial current density of 734 mA cm −2 and cathodic energy efficiency of 59 % at a moderate overpotential of 800 mV, representing a record formate-production performance so far. Experimental and theoretical studies indicate that the Sb-Bi interactions activate Sb sites to selectively stabilize *OCHO intermediates, facilitating CO 2 -to-formate conversion. This work offers insights in manipulating bimetallic interactions to transform inert materials into active catalysts for efficient electrocatalysis. • Sb-Bi interactions induce electrocatalytic switching from HER to CO 2 ER. • Sb 2 Bi 6 exhibits a maximum formate selectivity of 95.8 % in an H-type cell. • Sb 2 Bi 6 achieves a record formate activity of 734 mA cm −2 in a flow cell. • Sb-Bi interactions facilitate Sb sites to stabilize *OCHO for formate formation." @default.
• W4282841566 created "2022-06-15" @default.
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• W4282841566 date "2022-11-01" @default.
• W4282841566 modified "2023-10-14" @default.
• W4282841566 title "Activating inert antimony for selective CO2 electroreduction to formate via bimetallic interactions" @default.
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• W4282841566 doi "https://doi.org/10.1016/j.apcatb.2022.121619" @default.
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