Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (7): 20250409.doi: 10.7503/cjcu20250409
• Physical Chemistry • Previous Articles Next Articles
ZHAO Hao1, DAI Bowen1, CHENG Chongbo1(
), BIAN Fengjie1, SHEN Dekui2, JIANG Xiaoxiang1
Received:2025-12-30
Online:2026-07-10
Published:2026-02-10
Contact:
CHENG Chongbo
E-mail:62125@njnu.edu.cn
Supported by:CLC Number:
TrendMD:
ZHAO Hao, DAI Bowen, CHENG Chongbo, BIAN Fengjie, SHEN Dekui, JIANG Xiaoxiang. Density Functional Theory Studies of Guaiacol Hydrodeoxygenation on Ni-Fe Cluster/Al2O3 Surface[J]. Chem. J. Chinese Universities, 2026, 47(7): 20250409.
| Adsorption configuration | Ni/Al2O3 | Ni⁃Fe/Al2O3 | ||
|---|---|---|---|---|
| Eads/eV | d/nm | Eads/eV | d/nm | |
| a | -2.00 | 0.153 | -1.83 | 0.123 |
| b | -1.94 | 0.180 | -1.60 | 0.170 |
| c | -2.17 | 0.135 | -1.75 | 0.167 |
| d | -2.17 | 0.123 | -2.12 | 0.120 |
Table 1 Adsorption energies(Eads) of Ni or Ni-Fe clusters adsorbed on the Al2O3(100) surface
| Adsorption configuration | Ni/Al2O3 | Ni⁃Fe/Al2O3 | ||
|---|---|---|---|---|
| Eads/eV | d/nm | Eads/eV | d/nm | |
| a | -2.00 | 0.153 | -1.83 | 0.123 |
| b | -1.94 | 0.180 | -1.60 | 0.170 |
| c | -2.17 | 0.135 | -1.75 | 0.167 |
| d | -2.17 | 0.123 | -2.12 | 0.120 |
| Adsorption site | Ni/Al2O3 | Ni⁃Fe/Al2O3 |
|---|---|---|
| Top 1 | -2.78 | -2.70 |
| Top 2 | -3.26 | -3.16 |
| Corner 1 | -3.51 | -3.60 |
| Corner 2 | -3.28 | -3.17 |
| Corner 3 | -3.28 | -3.11 |
| Corner 4 | -3.29 | -3.16 |
Table 2 Adsorption energies(Eads, eV) of guaiacol adsorbed on different sites of catalyst
| Adsorption site | Ni/Al2O3 | Ni⁃Fe/Al2O3 |
|---|---|---|
| Top 1 | -2.78 | -2.70 |
| Top 2 | -3.26 | -3.16 |
| Corner 1 | -3.51 | -3.60 |
| Corner 2 | -3.28 | -3.17 |
| Corner 3 | -3.28 | -3.11 |
| Corner 4 | -3.29 | -3.16 |
| Reaction type | Ni/Al2O3 | Ni⁃Fe/Al2O3 | ||
|---|---|---|---|---|
| Ea/eV | ΔEr/eV | Ea/eV | ΔEr/eV | |
| -OCH3 | 1.71 | 0.03 | 1.54 | 0.68 |
| -CH3 | 1.20 | -0.79 | 0.85 | -0.28 |
| CH3-H | 3.20 | 1.99 | 4.04 | 2.62 |
| -OH | 2.60 | 0.44 | 2.90 | 0.52 |
| OH-H | 1.47 | 1.06 | 2.43 | 1.78 |
| +H(C4) | 1.22 | 0.63 | 1.35 | 0.69 |
| +H(C5) | 1.32 | 0.11 | 1.38 | 0.06 |
Table 3 Activation energies(Ea) and reaction energies(ΔEr) for elementary reactions of guaiacol on the Ni/Al2O3 and Ni-Fe/Al2O3
| Reaction type | Ni/Al2O3 | Ni⁃Fe/Al2O3 | ||
|---|---|---|---|---|
| Ea/eV | ΔEr/eV | Ea/eV | ΔEr/eV | |
| -OCH3 | 1.71 | 0.03 | 1.54 | 0.68 |
| -CH3 | 1.20 | -0.79 | 0.85 | -0.28 |
| CH3-H | 3.20 | 1.99 | 4.04 | 2.62 |
| -OH | 2.60 | 0.44 | 2.90 | 0.52 |
| OH-H | 1.47 | 1.06 | 2.43 | 1.78 |
| +H(C4) | 1.22 | 0.63 | 1.35 | 0.69 |
| +H(C5) | 1.32 | 0.11 | 1.38 | 0.06 |
| Step | Reaction | E/eV | |
|---|---|---|---|
| Ni/Al2O3 | Ni⁃Fe/Al2O3 | ||
| ① | C6H4OCH3OH(g)+H2(g) | — | — |
| ② | C6H4OCH3OH*+H2(g) | -1.35 | -1.48 |
| TS1 | -0.15 | -0.64 | |
| ③ | C6H4OOH*+CH3* +H2(g) | -2.13 | -1.76 |
| ④ | C6H4OOH*+CH3* +H*+1/2H2(g) | -0.95 | -0.60 |
| TS2 | 0.19 | 0.28 | |
| ⑤ | C6H5OOH*+CH3* +1/2H2(g) | -2.12 | -2.02 |
| ⑥ | C6H5OOH(g)+CH3* +1/2H2(g) | -0.61 | -0.60 |
| ⑦ | C6H5OOH(g)+CH3* +H* | -0.97 | -0.96 |
| ⑧ | C6H5OOH(g)+CH4* | -1.05 | -1.04 |
| ⑨ | C6H5OOH(g)+CH4(g) | -1.25 | -1.25 |
Table 4 Energies(E) for guaiacol directly demethylation followed by hydrogenation to catechol on the Ni/Al2O3 and Ni-Fe/Al2O3 catalysts
| Step | Reaction | E/eV | |
|---|---|---|---|
| Ni/Al2O3 | Ni⁃Fe/Al2O3 | ||
| ① | C6H4OCH3OH(g)+H2(g) | — | — |
| ② | C6H4OCH3OH*+H2(g) | -1.35 | -1.48 |
| TS1 | -0.15 | -0.64 | |
| ③ | C6H4OOH*+CH3* +H2(g) | -2.13 | -1.76 |
| ④ | C6H4OOH*+CH3* +H*+1/2H2(g) | -0.95 | -0.60 |
| TS2 | 0.19 | 0.28 | |
| ⑤ | C6H5OOH*+CH3* +1/2H2(g) | -2.12 | -2.02 |
| ⑥ | C6H5OOH(g)+CH3* +1/2H2(g) | -0.61 | -0.60 |
| ⑦ | C6H5OOH(g)+CH3* +H* | -0.97 | -0.96 |
| ⑧ | C6H5OOH(g)+CH4* | -1.05 | -1.04 |
| ⑨ | C6H5OOH(g)+CH4(g) | -1.25 | -1.25 |
| Reaction type | Ni/Al2O3 | Ni⁃Fe/Al2O3 | ||
|---|---|---|---|---|
| Ea/eV | ΔEr/eV | Ea/eV | ΔEr/eV | |
| -OH(C1) | 1.62 | 1.12 | 1.70 | 1.30 |
| -OH(C2) | 1.90 | 1.25 | 2.79 | 1.60 |
| +H(C4) | 2.04 | 0.62 | 2.68 | 0.68 |
| +H(C5) | 2.34 | 0.58 | 2.49 | 0.63 |
Table 5 Activation energies(Ea) and reaction energies(ΔEr) for elementary reactions of catechol on the Ni/Al2O3 and Ni-Fe/Al2O3 catalysts
| Reaction type | Ni/Al2O3 | Ni⁃Fe/Al2O3 | ||
|---|---|---|---|---|
| Ea/eV | ΔEr/eV | Ea/eV | ΔEr/eV | |
| -OH(C1) | 1.62 | 1.12 | 1.70 | 1.30 |
| -OH(C2) | 1.90 | 1.25 | 2.79 | 1.60 |
| +H(C4) | 2.04 | 0.62 | 2.68 | 0.68 |
| +H(C5) | 2.34 | 0.58 | 2.49 | 0.63 |
| Step | Reaction | E/eV | |
|---|---|---|---|
| Ni/Al2O3 | Ni⁃Fe/Al2O3 | ||
| (1) | C6H6O2(g)+H2(g) | — | — |
| (2) | C6H6O2*+H2(g) | -1.52 | -1.46 |
| TS1 | 0.10 | 0.24 | |
| (3) | C6H5O*+OH*+H2(g) | -1.53 | -1.16 |
| (4) | C6H5O*+OH*+H*+1/2H2(g) | -0.52 | -0.48 |
| TS2 | 0.88 | 1.06 | |
| (5) | C6H6O*+OH*+1/2H2(g) | -1.85 | -1.67 |
| (6) | C6H6O(g)+OH*+1/2H2(g) | -0.71 | -0.74 |
| (7) | C6H6O(g)+OH*+H* | -0.82 | -0.82 |
| (8) | C6H6O(g)+H2O(g) | -0.52 | -0.52 |
Table 6 Energies(E) for catechol directly dehydroxylation followed by hydrogenation to phenol on the Ni/Al2O3 and Ni-Fe/Al2O3
| Step | Reaction | E/eV | |
|---|---|---|---|
| Ni/Al2O3 | Ni⁃Fe/Al2O3 | ||
| (1) | C6H6O2(g)+H2(g) | — | — |
| (2) | C6H6O2*+H2(g) | -1.52 | -1.46 |
| TS1 | 0.10 | 0.24 | |
| (3) | C6H5O*+OH*+H2(g) | -1.53 | -1.16 |
| (4) | C6H5O*+OH*+H*+1/2H2(g) | -0.52 | -0.48 |
| TS2 | 0.88 | 1.06 | |
| (5) | C6H6O*+OH*+1/2H2(g) | -1.85 | -1.67 |
| (6) | C6H6O(g)+OH*+1/2H2(g) | -0.71 | -0.74 |
| (7) | C6H6O(g)+OH*+H* | -0.82 | -0.82 |
| (8) | C6H6O(g)+H2O(g) | -0.52 | -0.52 |
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