Chinese Journal of Catalysis ›› 2021, Vol. 42 ›› Issue (11): 2027-2037.DOI: 10.1016/S1872-2067(21)63828-7
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Dongdong Wanga,b, Wanbing Gonga,#(), Jifang Zhanga,b, Miaomiao Hanc,$(
), Chun Chena, Yunxia Zhanga, Guozhong Wanga, Haimin Zhanga, Huijun Zhaoa,d,*(
)
Received:
2021-03-16
Revised:
2021-03-16
Accepted:
2021-04-15
Online:
2021-11-18
Published:
2021-06-08
Contact:
Wanbing Gong,Miaomiao Han,Huijun Zhao
About author:
$E-mail:Tel: +86-551-65591263; Fax: +86-551-65591434; E-mail: mmhan@zjhu.edu.cnSupported by:
Dongdong Wang, Wanbing Gong, Jifang Zhang, Miaomiao Han, Chun Chen, Yunxia Zhang, Guozhong Wang, Haimin Zhang, Huijun Zhao. Encapsulated Ni-Co alloy nanoparticles as efficient catalyst for hydrodeoxygenation of biomass derivatives in water[J]. Chinese Journal of Catalysis, 2021, 42(11): 2027-2037.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(21)63828-7
Fig. 1. (a) Schematic diagram illustrating the synthetic procedure of NiCo@N-CNTs/CMF; Low and high magnification SEM images (b,c), low and high magnification TEM images (d,e) and HRTEM images (f) of NiCo@N-CNTs/CMF; (g,h) Contrast intensity profiles indicating the lattice parameter of NiCo alloy and C, respectively; (i) Line profile of a representative NiCo NP; (j) HAADF-STEM image and corresponding element mapping images.
Fig. 2. (a,b) XRD patterns of Ni@N-CNTs/CMF, Co@N-CNTs/CMF and NiCo@N-CNTs/CMF, respectively; (c) Ni 2p XPS spectra of Ni@N-CNTs/CMF and NiCo@N-CNTs/CMF; (d) Co 2p XPS spectra of Co@N-CNTs/CMF and NiCo@N-CNTs/CMF.
Fig. 3. Catalytic HDO of vanillin in water by NiCo@N-CNTs/CMF; (a) Effect of reaction temperature (2 MPa H2, 6 h); (b) Effect of H2 pressure (120 °C, 6 h); (c) Effect of reaction time (120 °C, 2 MPa H2); (d) Cyclic stability test (120 °C, 2 MPa H2, 1 h). Reaction solution: 10 mL H2O contains 30 mg catalyst and 0.5 mmol vanillin.
Fig. 4. Catalytic HDO of vanillin in water under 120 °C and 2 MPa H2 pressure by Ni@N-CNTs/CMF (a) and Co@N-CNTs/CMF (b); Plot of -ln(C/C0) against reaction time (c) and the corresponding reaction rate constants (d) for Ni@N-CNTs/CMF, Co@N-CNTs/CMF and NiCo@N-CNTs/CMF. Reaction solution: 10 mL H2O contains 30 mg catalyst and 0.5 mmol vanillin.
Fig. 5. (a) Optimized geometry for the configuration of vanillin adsorption on Ni (111), Co (111) and NiCo (111) surfaces. Grey, blue, brown, red, and pink spheres represent Ni, Co, C, O and H, respectively; (b) Adsorption energy of hydrogen on Ni (111), Co (111) and NiCo (111) surfaces; (c) H2-TPD profiles of Ni@N-CNTs/CMF, Co@N-CNTs/CMF and NiCo@N-CNTs/CMF.
Entry | Substrate | Product | Time (h) | Conv. (%) | Sel. (%) |
---|---|---|---|---|---|
1 | | | 6 | 100 | 100 |
2 | | | 6 | 100 | 98.7 |
3 | | | 4 | 100 | 100 |
4 | | | 6 | 100 | 92.4 |
5 | | | 6 | 100 | 98.1 |
6 | | | 10 | 100 | 93.2 |
7 | | | 10 | 100 | 91.5 |
Table 1 HDO of various substrates catalyzed by NiCo@N-CNTs/CMF catalyst a.
Entry | Substrate | Product | Time (h) | Conv. (%) | Sel. (%) |
---|---|---|---|---|---|
1 | | | 6 | 100 | 100 |
2 | | | 6 | 100 | 98.7 |
3 | | | 4 | 100 | 100 |
4 | | | 6 | 100 | 92.4 |
5 | | | 6 | 100 | 98.1 |
6 | | | 10 | 100 | 93.2 |
7 | | | 10 | 100 | 91.5 |
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