Switching between C 2+  Products and CH 4  in CO 2  Electrolysis by Tuning the Composition and Structure of Rare-Earth/Copper Catalysts

Liu, Jiyuan; Li, Pengsong; Bi, Jiahui; Jia, Shuaiqiang; Wang, Yong; Kang, Xinchen; Sun, Xiaofu; Zhu, Qinggong; Han, Buxing

doi:10.1021/jacs.3c05562

articleJournal of the American Chemical SocietyOct 11, 2023Closed access

Switching between C 2+ Products and CH 4 in CO 2 Electrolysis by Tuning the Composition and Structure of Rare-Earth/Copper Catalysts

JLJiyuan Liu PLPengsong Li JBJiahui Bi SJShuaiqiang Jia YWYong Wang

Chinese Academy of Sciences · Beijing National Laboratory for Molecular Sciences · +2 more institutions

PubMed

Indexed incrossrefpubmed

Abstract

Rational regulation of the reaction pathway to produce the desired products is one of the most significant challenges in the electrochemical CO2 reduction reaction (CO2RR). Herein, we designed a series of rare-earth Cu catalysts with mixed phases. It was found that the products could be switched from C2+ to CH4 by tuning the composition and structure of the catalysts. Particularly at the Cu/Sm atomic ratio of 9/1 (Cu9Sm1–Ox), the Faradaic efficiency (FE) for C2+ products (FEC2+) could reach 81% at 700 mA cm–2 with negligible CH4. However, the FE of CH4 (FECH4) was 65% at 500 mA cm–2 over Cu1Sm9–Ox (Cu/Sm = 1/9), and the FEC2+ was extremely low. Experiments and theoretical studies indicated that the stable…

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Keywords

Catalysis
Chemistry
Electrolysis
Electrochemistry
Copper
Faraday efficiency
Bulk electrolysis
Redox

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