Journal
NANO RESEARCH
Volume 13, Issue 3, Pages 768-774Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-020-2692-1
Keywords
multi-shelled CuO microboxes; nanocrystals; CO2 reduction; C2H4
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Funding
- Ministry of Science and Technology of China [2017YFA0403003]
- National Natural Science Foundation of China [21525316, 21673254]
- Chinese Academy of Sciences [QYZDY-SSW-SLH013]
- Beijing Municipal Science & Technology Commission [Z191100007219009]
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The electroreduction of CO2 to valuable chemicals and fuels offers an effective mean for energy storage. Although CO2 has been efficiently converted into C-1 products (e.g., carbon monoxide, formic acid, methane and methanol), its convention into high value-added multicarbon hydrocarbons with high selectivity and activity still remains challenging. Here we demonstrate the formation of multi-shelled CuO microboxes for the efficient and selective electrocatalytic CO2 reduction to C2H4. Such a structure favors the accessibility of catalytically active sites, improves adsorption of reaction intermediate (CO), inhibits the diffusion of produced OH- and promotes C-C coupling reaction. Owing to these unique advantages, the multi-shelled CuO microboxes can effectively convert CO2 into C2H4 with a maximum faradaic efficiency of 51.3% in 0.1 M K2SO4. This work provides an effective way to improve CO2 reduction efficiency via constructing micro- and nanostructures of electrocatalysts.
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