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Wu, Zhi-Zheng; Zhang, Xiao-Long; Niu, Zhuang-Zhuang; Gao, Fei-Yue; Yang, Peng-Peng; Chi, Li-Ping; Shi, Lei; Wei, Wen-Sen; Liu, Ren; Chen, Zhi; Hu, Shaojin; Zheng, Xiao; Gao, Min-Rui
Journal of the American Chemical Society, 01/2022, Letnik: 144, Številka: 1Journal Article
The electrosynthesis of valuable multicarbon chemicals using carbon dioxide (CO2) as a feedstock has substantially progressed recently but still faces considerable challenges. A major difficulty lines in the sluggish kinetics of forming carbon–carbon (C–C) bonds, especially in neutral media. We report here that oxide-derived copper crystals enclosed by six {100} and eight {111} facets can reduce CO2 to multicarbon products with a high Faradaic efficiency of 74.9 ± 1.7% at a commercially relevant current density of 300 mA cm–2 in 1 M KHCO3 (pH ∼ 8.4). By combining the experimental and computational studies, we uncovered that Cu(100)/Cu(111) interfaces offer a favorable local electronic structure that enhances *CO adsorption and lowers C–C coupling activation energy barriers, performing superior to Cu(100) and Cu(111) surfaces, respectively. On this catalyst, no obvious degradation was observed at 300 mA cm–2 over 50 h of continuous operation.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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