Hollow Copper Nanocubes Promoting CO2 Electroreduction to Multicarbon Products

Electrochemical carbon dioxide reduction reaction (CO2RR) to multicarbon (C2+) compounds holds great potential for achieving carbon neutrality and storing intermittent renewable energy. The formation of carbon–carbon (C–C) bonds, affected by the concentration of *CO intermediates on the surface of c...

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Veröffentlicht in:Industrial & engineering chemistry research 2022-12, Vol.61 (50), p.18250-18257
Hauptverfasser: Liu, Jinping, Fan, Qun, Chen, Xiaoyi, Kuang, Siyu, Yan, Tianxiang, Liu, Hai, Zhang, Sheng, Ma, Xinbin
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Sprache:eng
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Zusammenfassung:Electrochemical carbon dioxide reduction reaction (CO2RR) to multicarbon (C2+) compounds holds great potential for achieving carbon neutrality and storing intermittent renewable energy. The formation of carbon–carbon (C–C) bonds, affected by the concentration of *CO intermediates on the surface of catalysts, is critical to facilitate the production of C2 species. Here, a novel method to prepare uniform hollow oxide-derived copper crystals is reported, reducing CO2 to C2 products (ethylene and ethanol) with an outstanding Faradaic efficiency of 71.1% in 0.1 M KHCO3. The degree of hollowness shows a positive tendency to C2 selectivity but negative to H2 and C1 selectivity. In situ surface-enhanced infrared absorption spectroscopy indicates that hollow structures enhance localized *CO concentration, boosting C–C coupling for producing C2 products. This provides a feasible strategy to enrich important intermediates to deeper reduction products through catalyst structure engineering.
ISSN:0888-5885
1520-5045
DOI:10.1021/acs.iecr.2c03912