Refining Surface Copper Species on Cu/SiO<sub>2</sub> Catalysts to Boost Furfural Hydrogenation to Furfuryl Alcohol

Refining Surface Copper Species on Cu/SiO<sub>2</sub> Catalysts to Boost Furfural Hydrogenation to Furfuryl Alcohol

Controllable hydrogenation of carbonyl groups (C=O) is crucial for converting furfural into high-value furfuryl alcohol. Instead of traditional impregnation method, a novel Cu-based catalyst (Cu/SiO<sub>2</sub>) is prepared using the ammonia evaporation method (AE) for the efficient hydr...

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Bibliographic Details
Main Authors: Jieqiong Wang, Jingyi Yang, Zezheng Bing, Yuanyuan Gao, Tao Yang, Qiaoyun Liu, Meng Zhang, Zhongyi Liu
Format: Article
Language:English
Published: MDPI AG 2025-01-01
Series:Molecules
Subjects:
layered copper silicate
Cu<sup>+</sup>/(Cu<sup>0</sup>+Cu<sup>+</sup>)
metal–support interaction
selective hydrogenation of furfural
activation of C=O
Online Access:https://www.mdpi.com/1420-3049/30/2/225
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Summary:Controllable hydrogenation of carbonyl groups (C=O) is crucial for converting furfural into high-value furfuryl alcohol. Instead of traditional impregnation method, a novel Cu-based catalyst (Cu/SiO<sub>2</sub>) is prepared using the ammonia evaporation method (AE) for the efficient hydrogenation of furfural to furfuryl alcohol under mild conditions. At the reaction conditions of 90 °C and 1 MPa H<sub>2</sub>, the 5Cu/SiO<sub>2</sub>-AE sample showed optimal performance with higher turnover frequency (36.0 h<sup>−1</sup>) and furfuryl alcohol selectivity (>99.9%). After five cycles, the catalyst recycled still showed a high reaction activity and selectivity for furfuryl alcohol. Characterization results such as XRD, H<sub>2</sub>-TPR, FT-IR, and XPS showed that the excellent catalytic performance of 5Cu/SiO<sub>2</sub>-AE catalyst was attributed to the formation of layered copper silicate and the high dispersion of Cu species. Furthermore, the formation of layered copper silicate resulted in a higher ratio of Cu<sup>+</sup>/(Cu<sup>0</sup>+Cu<sup>+</sup>) at a reduction temperature of 250 °C, which was also responsible for the optimum activity. This work showed the importance of controllable synthesis of layered copper silicate in improving the catalytic performance of copper-containing catalyst.
ISSN:1420-3049

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