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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2025-01-01
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| author | Jieqiong Wang Jingyi Yang Zezheng Bing Yuanyuan Gao Tao Yang Qiaoyun Liu Meng Zhang Zhongyi Liu |
| author_facet | Jieqiong Wang Jingyi Yang Zezheng Bing Yuanyuan Gao Tao Yang Qiaoyun Liu Meng Zhang Zhongyi Liu |
| author_sort | Jieqiong Wang |
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| description | 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. |
| format | Article |
| id | doaj-art-b1efcbc13dc5403d9941be57e4b530ca |
| institution | Kabale University |
| issn | 1420-3049 |
| language | English |
| publishDate | 2025-01-01 |
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| series | Molecules |
| spelling | doaj-art-b1efcbc13dc5403d9941be57e4b530ca2025-01-24T13:43:10ZengMDPI AGMolecules1420-30492025-01-0130222510.3390/molecules30020225Refining Surface Copper Species on Cu/SiO<sub>2</sub> Catalysts to Boost Furfural Hydrogenation to Furfuryl AlcoholJieqiong Wang0Jingyi Yang1Zezheng Bing2Yuanyuan Gao3Tao Yang4Qiaoyun Liu5Meng Zhang6Zhongyi Liu7College of Chemistry, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaCollege of Chemistry, Zhengzhou University, Zhengzhou 450001, ChinaCollege of Chemistry, Zhengzhou University, Zhengzhou 450001, ChinaCollege of Chemistry, Zhengzhou University, Zhengzhou 450001, ChinaCollege of Chemistry, Zhengzhou University, Zhengzhou 450001, ChinaCollege of Chemistry, Zhengzhou University, Zhengzhou 450001, ChinaCollege of Chemistry, Zhengzhou University, Zhengzhou 450001, ChinaControllable 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.https://www.mdpi.com/1420-3049/30/2/225layered copper silicateCu<sup>+</sup>/(Cu<sup>0</sup>+Cu<sup>+</sup>)metal–support interactionselective hydrogenation of furfuralactivation of C=O |
| spellingShingle | Jieqiong Wang Jingyi Yang Zezheng Bing Yuanyuan Gao Tao Yang Qiaoyun Liu Meng Zhang Zhongyi Liu Refining Surface Copper Species on Cu/SiO<sub>2</sub> Catalysts to Boost Furfural Hydrogenation to Furfuryl Alcohol Molecules layered copper silicate Cu<sup>+</sup>/(Cu<sup>0</sup>+Cu<sup>+</sup>) metal–support interaction selective hydrogenation of furfural activation of C=O |
| title | Refining Surface Copper Species on Cu/SiO<sub>2</sub> Catalysts to Boost Furfural Hydrogenation to Furfuryl Alcohol |
| title_full | Refining Surface Copper Species on Cu/SiO<sub>2</sub> Catalysts to Boost Furfural Hydrogenation to Furfuryl Alcohol |
| title_fullStr | Refining Surface Copper Species on Cu/SiO<sub>2</sub> Catalysts to Boost Furfural Hydrogenation to Furfuryl Alcohol |
| title_full_unstemmed | Refining Surface Copper Species on Cu/SiO<sub>2</sub> Catalysts to Boost Furfural Hydrogenation to Furfuryl Alcohol |
| title_short | Refining Surface Copper Species on Cu/SiO<sub>2</sub> Catalysts to Boost Furfural Hydrogenation to Furfuryl Alcohol |
| title_sort | refining surface copper species on cu sio sub 2 sub catalysts to boost furfural hydrogenation to furfuryl alcohol |
| topic | layered copper silicate Cu<sup>+</sup>/(Cu<sup>0</sup>+Cu<sup>+</sup>) metal–support interaction selective hydrogenation of furfural activation of C=O |
| url | https://www.mdpi.com/1420-3049/30/2/225 |
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