High-Power CO₂‑to‑C₂ Electroreduction on Ga-Spaced, Square-like Cu Sites

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dc.contributor.authorYan, S.
dc.contributor.authorChen, Z.
dc.contributor.authorChen, Y.
dc.contributor.authorPeng, C.
dc.contributor.authorMa, X.
dc.contributor.authorLv, X.
dc.contributor.authorQiu, Z.
dc.contributor.authorYang, Y.
dc.contributor.authorYang, Y.
dc.contributor.authorKuang, M.
dc.contributor.authorXu, X.
dc.contributor.authorZheng, G.
dc.date.issued2023
dc.description.abstractThe electrochemical conversion of CO2 into multicarbon (C2) products on Cu-based catalysts is strongly affected by the surface coverage of adsorbed CO (*CO) intermediates and the subsequent C−C coupling. However, the increased *CO coverage inevitably leads to strong *CO repulsion and a reduced C−C coupling efficiency, thus resulting in suboptimal CO2-to-C2 activity and selectivity, especially at ampere-level electrolysis current densities. Herein, we developed an atomically ordered Cu9Ga4 intermetallic compound consisting of Cu square-like binding sites interspaced by catalytically inert Ga atoms. Compared to Cu(100) previously known with a high C2 selectivity, the Ga-spaced, square-like Cu sites presented an elongated Cu−Cu distance that allowed to reduce *CO repulsion and increased *CO coverage simultaneously, thus endowing more efficient C−C coupling to C2 products than Cu(100) and Cu(111). The Cu9Ga4 catalyst exhibited an outstanding CO2-to-C2 electroreduction, with a peak C2 partial current density of 1207 mA cm−2 and a corresponding Faradaic efficiency of 71%. Moreover, the Cu9Ga4 catalyst demonstrated a high-power (∼200 W) electrolysis capability with excellent electrochemical stability.
dc.description.statementofresponsibilityShuai Yan, Zheng Chen, Yangshen Chen, Chen Peng, Xingyu Ma, Ximeng Lv, Zhehao Qiu, Yong Yang, Yaoyue Yang, Min Kuang, Xin Xu, and Gengfeng Zheng
dc.identifier.citationJournal of the American Chemical Society, 2023; 145(48):1-9
dc.identifier.doi10.1021/jacs.3c10202
dc.identifier.issn0002-7863
dc.identifier.issn1520-5126
dc.identifier.orcidPeng, C. [0000-0003-2767-7698]
dc.identifier.urihttps://hdl.handle.net/2440/140355
dc.language.isoen
dc.publisherAmerican Chemical Society (ACS)
dc.rights© 2023 American Chemical Society
dc.source.urihttp://dx.doi.org/10.1021/jacs.3c10202
dc.subjectAdsorption; Catalysts; Electrocatalysts; Electrolysis; Evolution reactions
dc.titleHigh-Power CO₂‑to‑C₂ Electroreduction on Ga-Spaced, Square-like Cu Sites
dc.title.alternativeHigh-Power CO2‑to‑C2 Electroreduction on Ga-Spaced, Square-like Cu Sites
dc.typeJournal article
pubs.publication-statusPublished

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