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| 001 | 837916 | ||
| 005 | 20210129231443.0 | ||
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| 100 | 1 | _ | |a Hou, Tingting |0 P:(DE-HGF)0 |b 0 |
| 245 | _ | _ | |a Yin and Yang Dual Characters of CuOx Clusters for C-C Band Oxidation Driven by Visible Light |
| 260 | _ | _ | |a Washington, DC |c 2017 |b ACS |
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| 520 | _ | _ | |a Selective cleavage of C–C bonds is pursued as a useful chemical transformation method in biomass utilization. Herein, we report a hybrid CuOx/ceria/anatase nanotube catalyst in the selective oxidation of C–C bonds under visible light irradiation. Using the lignin β-1 model as a substrate offers 96% yields of benzaldehydes. Characterization results by high angle annular dark field scanning transmission electron microscopy (HAADF-STEM) and energy-dispersive X-ray spectroscopy element (EDX) mapping reveal that CuOx clusters are highly dispersed on the exposed anatase surface as well as on the nanosized ceria domains. In-depth investigations by Raman and ultraviolet visible diffuse reflectance spectra (UV−vis DRS), together with density functional theory (DFT) calculations, further verify that the CuOx clusters present on the ceria domains increase the concentration of surface defects (Ce3+ ions and oxygen vacancies) and accordingly improve the photocatalytic activity (Yang character); the CuOx clusters decorating on anatase suppress the side reaction (oxy-dehydrogenation without C–C bond cleavage) because of an upward shift in the valence band (VB) edge of anatase (Yin character). Mechanism investigation indicates hydrogen abstraction from β-carbon by photogenerated holes is a vital step in the conversion. |
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| 700 | 1 | _ | |a Lu, Jianmin |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Wang, Yehong |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Wang, Feng |0 P:(DE-HGF)0 |b 6 |e Corresponding author |
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