Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (4): 1084-1091.DOI: 10.1016/S1872-2067(21)63931-1
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Jing-Yu Li, Ming-Yu Qi, Yi-Jun Xu*()
Received:
2021-07-14
Accepted:
2021-07-14
Online:
2022-03-05
Published:
2022-03-01
Contact:
Yi-Jun Xu
Supported by:
Jing-Yu Li, Ming-Yu Qi, Yi-Jun Xu. Efficient splitting of alcohols into hydrogen and C-C coupled products over ultrathin Ni-doped ZnIn2S4 nanosheet photocatalyst[J]. Chinese Journal of Catalysis, 2022, 43(4): 1084-1091.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(21)63931-1
Fig. 1. (a) The schematic illustration for the synthesis of the composite ZIS/Ni NSs via a facile one-pot oil bath method; the SEM images of the pure ZIS NSs (b) and composite ZIS/Ni NSs (c); TEM (d) and HRTEM (e) images of composite ZIS/Ni NSs; (f) the AFM image of ZIS/Ni NSs; (g) The high angle annular dark field (HAADF)-scanning transmission electron microscopy and EDX elemental mapping results of the composite ZIS/Ni NSs. The insets of (e) and (f) are the SAED result and the height profile of composite ZIS/Ni NSs, respectively.
Fig. 2. The XRD patterns (a) and DRS spectra (b) of ultrathin ZIS NSs and ZIS/Ni composite; The high-resolution XPS spectra of Zn 2p (c), In 3d (d), S 2p (e) and Ni 2p (f) of the pure ZIS NSs (bottom) and composite ZIS/Ni NSs (top).
Fig. 3. (a) The illustration for photocatalytic selective oxidation of BA coupling with H2 evolution; (b) The photocatalytic activities of H2 evolution and dehydrocoupling of BA into HB over pure ZIS and ZIS/Nix composites; (c) The conversion of BA and the selectivity to HB over different photocatalysts; Long-time experiments (d) and photocatalytic cyclic tests (e) over ZIS/Ni1 NSs. Reaction conditions: 5 mg photocatalysts in 5 mL CH3CN containing 76.9 μmol BA, irradiation for 2 h.
Entry | -R | H2 yield (μmol) | Liquid yield (μmol) | Substituted HB selectivity b(%) | Aromatic alcohols conversion c(%) | e-/h+d | |
---|---|---|---|---|---|---|---|
Substituted HB | By-products | ||||||
1 | -H | 41.9 | 32.9 | 0.8 | 98.5 | 86.0 | 1.2 |
2 e | -H | 13.8 | 16.8 | 0.6 | 98.0 | 46.1 | 0.8 |
3 f | -H | 19.8 | 20.5 | 0.7 | 97.9 | 55.6 | 0.9 |
4 g | -H | 22.5 | 16.8 | 7.5 | 81.8 | 50.8 | 0.9 |
5 | -F | 32.1 | 28.5 | 3.5 | 93.8 | 83.5 | 1.0 |
6 | -Cl | 29.1 | 31.7 | 0.5 | 99.2 | 90.2 | 0.9 |
7 | -CH3 | 37.1 | 32.6 | 3.2 | 95.3 | 90.4 | 1.0 |
Table 1 Photocatalytic dehydrocoupling of aromatic alcohols into substituted HB and H2 evolution a.
Entry | -R | H2 yield (μmol) | Liquid yield (μmol) | Substituted HB selectivity b(%) | Aromatic alcohols conversion c(%) | e-/h+d | |
---|---|---|---|---|---|---|---|
Substituted HB | By-products | ||||||
1 | -H | 41.9 | 32.9 | 0.8 | 98.5 | 86.0 | 1.2 |
2 e | -H | 13.8 | 16.8 | 0.6 | 98.0 | 46.1 | 0.8 |
3 f | -H | 19.8 | 20.5 | 0.7 | 97.9 | 55.6 | 0.9 |
4 g | -H | 22.5 | 16.8 | 7.5 | 81.8 | 50.8 | 0.9 |
5 | -F | 32.1 | 28.5 | 3.5 | 93.8 | 83.5 | 1.0 |
6 | -Cl | 29.1 | 31.7 | 0.5 | 99.2 | 90.2 | 0.9 |
7 | -CH3 | 37.1 | 32.6 | 3.2 | 95.3 | 90.4 | 1.0 |
Fig. 4. (a) The EPR spectra of pure ZIS and ZIS/Ni1 composites with irradiation for 10 min; (b) The decay curves of photo voltage and electron lifetime of pure ZIS and ZIS/Ni1 composites (see experimental section in supporting information for the calculation formula); The EIS Nyquist plots (c), transient photocurrent responses (d) and time-resolved PL spectra decay curve (e) (λex = 360 nm) of pure ZIS and ZIS/Ni1 composites.
Fig. 5. Illustration of the band structure for ZIS and ZIS/Ni1 composites and the plausible reaction mechanism for photocatalytic selective oxidation of BA coupling with H2 evolution.
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