Tunable CO/H2 ratios of electrochemical reduction of CO2 through the Zn-Ln dual atomic catalysts

Dual-metal atomic catalysts produce flexible ratios of syngas products. Electrochemical reduction of CO 2 (CO 2 RR) to value-added liquid fuels is a highly appealing solution for carbon-neutral recycling, especially to syngas (CO/H 2 ). Current strategies suffer from poor faradaic efficiency (FE), s...

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Veröffentlicht in:Science advances 2021-11, Vol.7 (47), p.eabl4915-eabl4915
Hauptverfasser: Liang, Zhong, Song, Lianpeng, Sun, Mingzi, Huang, Bolong, Du, Yaping
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Sprache:eng
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Zusammenfassung:Dual-metal atomic catalysts produce flexible ratios of syngas products. Electrochemical reduction of CO 2 (CO 2 RR) to value-added liquid fuels is a highly appealing solution for carbon-neutral recycling, especially to syngas (CO/H 2 ). Current strategies suffer from poor faradaic efficiency (FE), selectivity, and controllability to the ratio of products. In this work, we have synthesized a series of single and dual atomic catalysts on the carbon nitride nanosheets. Adjusting the ratio of La and Zn atomic sites produces syngas with a wide range of CO/H 2 ratios. Moreover, the ZnLa-1/CN electrocatalyst generates the syngas with a ratio of CO/H 2 = 0.5 at a wide potential range, and the total FE of CO2RR reaches 80% with good stability. Density functional theory calculations have confirmed that the Zn and La affect electronic structures and determine the formation of CO and H 2 , respectively. This work indicates a promising strategy in the development of atomic catalysts for more controllable CO 2 RR.
ISSN:2375-2548
DOI:10.1126/sciadv.abl4915