2023
DOI: 10.1021/acsnano.3c03952
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Boosting CO2 Electroreduction to C2H4 via Unconventional Hybridization: High-Order Ce4+ 4f and O 2p Interaction in Ce-Cu2O for Stabilizing Cu+

Abstract: Efficient conversion of carbon dioxide (CO 2 ) into value-added materials and feedstocks, powered by renewable electricity, presents a promising strategy to reduce greenhouse gas emissions and close the anthropogenic carbon loop. Recently, there has been intense interest in Cu 2 O-based catalysts for the CO 2 reduction reaction (CO 2 RR), owing to their capabilities in enhancing C−C coupling. However, the electrochemical instability of Cu + in Cu 2 O leads to its inevitable reduction to Cu 0 , resulting in poo… Show more

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Cited by 52 publications
(22 citation statements)
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“…As shown in Fig. 2b, the characteristic peak of Cu 2 O is located at 220 cm −1 in the Raman spectra, 34 and its intensity decreases with the increase in CDs content. The peak of Cu 2 O in Cu 2 O-CDs-30 largely disappears, which is attributed to the thicker shells and agglomerated clumps formed by the excess CDs masking the surface Raman effect of Cu 2 O.…”
Section: Resultsmentioning
confidence: 77%
“…As shown in Fig. 2b, the characteristic peak of Cu 2 O is located at 220 cm −1 in the Raman spectra, 34 and its intensity decreases with the increase in CDs content. The peak of Cu 2 O in Cu 2 O-CDs-30 largely disappears, which is attributed to the thicker shells and agglomerated clumps formed by the excess CDs masking the surface Raman effect of Cu 2 O.…”
Section: Resultsmentioning
confidence: 77%
“…As a result, these surface defects are likely responsible for the pronounced differences observed in surface-adsorbed oxygen between Cu v -Cu 2 O and pure Cu 2 O. Notably, the lattice O desorption temperature for Cu v -Cu 2 O (534.9 °C) markedly exceeds that of the pure Cu 2 O (424.2 °C), indicating a more robust Cu–O bond in the former . A minor temperature peak observed for pure Cu 2 O at 333.6 °C seems to be machine noise.…”
Section: Resultsmentioning
confidence: 96%
“…Moreover, E o for Cu v -Cu 2 O is higher by 0.1–0.3 eV than that for pure Cu 2 O when one or two O atoms are removed from the bulk surface (Figure g). This hints at a more challenging generation of oxygen defects in Cu v -Cu 2 O, further indicating the higher stability of Cu–O bond in Cu v -Cu 2 O. , The specific configurations of the O defects are detailed in Figure S7. The findings suggest that the uplifted energy level of 2p of O due to Cu defects curtails the leaching of lattice O.…”
Section: Resultsmentioning
confidence: 99%
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