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Chemical Engineering Journal

Chemical Engineering Journal

IF: 13.3
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Synergistic promotion of phenol hydrogenation by regulating specific surface area and oxygen vacancies based on the morphology dependent effect

Published:6 December 2024 DOI: 10.1016/j.cej.2024.158335
Shuai Wang, Tairui Xue, Yuanyuan Wang, Xueqin Wang, Feng Li, Yanguang Chen, Yuxuan Tian, Bolong Jiang, Hua Song

Abstract

The development of highly efficient catalysts to promote sustainable production of value-added chemicals from biomass remains a significant task. This work reports a strategy to accelerate the selective hydrogenation of phenol to cyclohexanol over Ni-based catalysts by modulating the concentration of oxygen vacancy and specific surface area of CeO2 supports. Ni@C/CeO2-F catalyst with a flower-like morphology achieved the best catalytic performance with 92.5?% phenol conversion and 100?% cyclohexanol selectivity compared with Ni@C/CeO2-R (50.2?%) and Ni@C/CeO2-C (57.6?%) catalysts at 140 ℃, 2?MPa, 2?h. Characterization results indicate the superior catalytic performance of Ni@C/CeO2-F catalyst mainly originated from its unique flower-like structure with a high content of oxygen vacancies (OVs), large specific area as well as the uniform dispersion of Ni active sites. Density functional theory (DFT) calculation results further confirm the existence of OVs can enhance the adsorption ability of the phenol, improve electron transfer rate and reduce reaction energy barrier, contributing to the improved catalytic performance. In addition, a negligible decline in catalytic performance after 5 successive cycles reveals the outstanding recyclability of Ni@C/CeO2-F catalyst.

Substances (7)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Sodium hydroxide 1310-73-2 NaOH 1213 suppliers $14.00-$16472.00
D(+)-Glucose 50-99-7 C6H12O6 1120 suppliers $6.00-$26950.00
Tetrahydrofuran 109-99-9 C4H8O 1107 suppliers $9.00-$17160.00
Phenol 108-95-2 C6H6O 801 suppliers $6297.50
Acrylamide 79-06-1 C3H5NO 667 suppliers $18.00-$1470.00
2,5-Dihydroxyterephthalic acid 610-92-4 C8H6O6 307 suppliers $6.00-$1662.69
GLUCOSE 58367-01-4 C6H12O6 27 suppliers Inquiry

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