Electrocatalytic CO₂ Reduction over Sn-Cu Bimetallic Catalysts Synthesized via an Amalgamated Lithium Metal Method.

Authors

Minghao Xie, Shichen Guo, Jianxin Wang, Haozhe Zhang, Xun Zhan, Lauren Valentino, Di-Jia Liu

Published in

Advanced science (Weinheim, Baden-Wurttemberg, Germany). Pages e77199. Aug 17, 2026. Epub Aug 17, 2026.

Abstract

Electrochemical carbon dioxide reduction reaction (eCO₂RR) provides a pathway to convert CO₂ into value-added chemicals. Here, we report a family of carbon-supported tin-copper (Sn-Cu) bimetallic catalysts synthesized via an amalgamated lithium metal (ALM) method with controlled tuning of metal dispersion from isolated atoms to nanocrystallites. As metal loadings increase, the catalyst structure evolves from atomically dispersed Sn-Cu dual sites (Sn_1.5Cu/C-0.75) to Sn-rich nanodomains (Sn₃Cu/C-13) and Cu/Sn crystallites (Sn₃Cu/C-24), leading to a systematic shift in CO₂RR selectivity from acetaldehyde to formate at low overpotentials. Notably, Sn_1.5Cu/C-0.75 achieves a Faradaic efficiency of 49.7% for acetaldehyde at -0.5 V versus the reversible hydrogen electrode. The CO₂ conversion pathways behind these selective, size-modulated catalysts are elucidated by structural characterization, together with electrochemical analysis of structure-selectivity correlations, establishing a clear structure-property relationship for tuning CO₂RR pathways.

PMID:
42606145
Bibliographic data and abstract were imported from PubMed on 17 Aug 2026.

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