A Simple Strategy Stabilizing for a CuFe/SiO<sub>2</sub> Catalyst and Boosting Higher Alcohols’ Synthesis from Syngas
Stable F-T-based catalyst development in direct CO hydrogenation to higher alcohols is still a challenge at present. In this study, CuFe/SiO<sub>2</sub> catalysts with a SiO<sub>2</sub> support treated with a piranha solution were prepared and evaluated in a long-term reactio...
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MDPI AG
2023-01-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/13/2/237 |
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| author | Nana Gong Yingquan Wu Qingxiang Ma Yisheng Tan |
| author_facet | Nana Gong Yingquan Wu Qingxiang Ma Yisheng Tan |
| author_sort | Nana Gong |
| collection | DOAJ |
| description | Stable F-T-based catalyst development in direct CO hydrogenation to higher alcohols is still a challenge at present. In this study, CuFe/SiO<sub>2</sub> catalysts with a SiO<sub>2</sub> support treated with a piranha solution were prepared and evaluated in a long-term reaction. The treated catalyst showed higher total alcohols’ selectivity and great stability during a reaction of more than 90 h. It was found that the treatment with the piranha solution enriched the surface hydroxyl groups on SiO<sub>2</sub>, so that the Cu–Fe active components could be firmly anchored and highly dispersed on the support, resulting in stable catalytic performance. Furthermore, the in situ DRIFTS revealed that the adsorption strength of CO on Cu<sup>+</sup> on the treated catalyst surface was weakened, which made the C-O bond less likely to be cleaved and thus significantly inhibited the formation of hydrocarbon products. Meanwhile, the non-dissociated CO species were obviously enriched on the Cu<sup>0</sup> surface, promoting the formation of alcohol products, and thus the selectivity of total alcohols was increased. This strategy will shed light on the design of supported catalysts with stabilized structures for a wide range of catalytic reactions. |
| first_indexed | 2024-03-11T09:01:33Z |
| format | Article |
| id | doaj.art-07d1bb1a76d241da94018ed4f63f2ac7 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-11T09:01:33Z |
| publishDate | 2023-01-01 |
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| series | Catalysts |
| spelling | doaj.art-07d1bb1a76d241da94018ed4f63f2ac72023-11-16T19:40:13ZengMDPI AGCatalysts2073-43442023-01-0113223710.3390/catal13020237A Simple Strategy Stabilizing for a CuFe/SiO<sub>2</sub> Catalyst and Boosting Higher Alcohols’ Synthesis from SyngasNana Gong0Yingquan Wu1Qingxiang Ma2Yisheng Tan3State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, ChinaState Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, ChinaState Key Laboratory of High-Efficiency Coal Utilization and Green Chemical Engineering, Ningxia University, Yinchuan 750021, ChinaState Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, ChinaStable F-T-based catalyst development in direct CO hydrogenation to higher alcohols is still a challenge at present. In this study, CuFe/SiO<sub>2</sub> catalysts with a SiO<sub>2</sub> support treated with a piranha solution were prepared and evaluated in a long-term reaction. The treated catalyst showed higher total alcohols’ selectivity and great stability during a reaction of more than 90 h. It was found that the treatment with the piranha solution enriched the surface hydroxyl groups on SiO<sub>2</sub>, so that the Cu–Fe active components could be firmly anchored and highly dispersed on the support, resulting in stable catalytic performance. Furthermore, the in situ DRIFTS revealed that the adsorption strength of CO on Cu<sup>+</sup> on the treated catalyst surface was weakened, which made the C-O bond less likely to be cleaved and thus significantly inhibited the formation of hydrocarbon products. Meanwhile, the non-dissociated CO species were obviously enriched on the Cu<sup>0</sup> surface, promoting the formation of alcohol products, and thus the selectivity of total alcohols was increased. This strategy will shed light on the design of supported catalysts with stabilized structures for a wide range of catalytic reactions.https://www.mdpi.com/2073-4344/13/2/237higher alcoholssyngasCO hydrogenationCuFe/SiO<sub>2</sub>stabilityhydroxyl group |
| spellingShingle | Nana Gong Yingquan Wu Qingxiang Ma Yisheng Tan A Simple Strategy Stabilizing for a CuFe/SiO<sub>2</sub> Catalyst and Boosting Higher Alcohols’ Synthesis from Syngas Catalysts higher alcohols syngas CO hydrogenation CuFe/SiO<sub>2</sub> stability hydroxyl group |
| title | A Simple Strategy Stabilizing for a CuFe/SiO<sub>2</sub> Catalyst and Boosting Higher Alcohols’ Synthesis from Syngas |
| title_full | A Simple Strategy Stabilizing for a CuFe/SiO<sub>2</sub> Catalyst and Boosting Higher Alcohols’ Synthesis from Syngas |
| title_fullStr | A Simple Strategy Stabilizing for a CuFe/SiO<sub>2</sub> Catalyst and Boosting Higher Alcohols’ Synthesis from Syngas |
| title_full_unstemmed | A Simple Strategy Stabilizing for a CuFe/SiO<sub>2</sub> Catalyst and Boosting Higher Alcohols’ Synthesis from Syngas |
| title_short | A Simple Strategy Stabilizing for a CuFe/SiO<sub>2</sub> Catalyst and Boosting Higher Alcohols’ Synthesis from Syngas |
| title_sort | simple strategy stabilizing for a cufe sio sub 2 sub catalyst and boosting higher alcohols synthesis from syngas |
| topic | higher alcohols syngas CO hydrogenation CuFe/SiO<sub>2</sub> stability hydroxyl group |
| url | https://www.mdpi.com/2073-4344/13/2/237 |
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