Boron Modified Bifunctional Cu/SiO<sub>2</sub> Catalysts with Enhanced Metal Dispersion and Surface Acid Sites for Selective Hydrogenation of Dimethyl Oxalate to Ethylene Glycol and Ethanol
Boron (B) promoter modified Cu/SiO<sub>2</sub> bifunctional catalysts were synthesized by sol-gel method and used to produce ethylene glycol (EG) and ethanol (EtOH) through efficient hydrogenation of dimethyl oxalate (DMO). Experimental results showed that boron promoter could significan...
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MDPI AG
2021-11-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/12/3236 |
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| author | Deliang Yang Runping Ye Ling Lin Rong Guo Peiyu Zhao Yanchao Yin Wei Cheng Wenpeng Yuan Yuangen Yao |
| author_facet | Deliang Yang Runping Ye Ling Lin Rong Guo Peiyu Zhao Yanchao Yin Wei Cheng Wenpeng Yuan Yuangen Yao |
| author_sort | Deliang Yang |
| collection | DOAJ |
| description | Boron (B) promoter modified Cu/SiO<sub>2</sub> bifunctional catalysts were synthesized by sol-gel method and used to produce ethylene glycol (EG) and ethanol (EtOH) through efficient hydrogenation of dimethyl oxalate (DMO). Experimental results showed that boron promoter could significantly improve the catalytic performance by improving the structural characteristics of the Cu/SiO<sub>2</sub> catalysts. The optimized 2B-Cu/SiO<sub>2</sub> catalyst exhibited excellent low temperature catalytic activity and long-term stability, maintaining the average EG selectivity (Sel.<sub>EG</sub>) of 95% at 190 °C, and maintaining the average EtOH selectivity (Sel.<sub>EtOH</sub>) of 88% at 260 °C, with no decrease even after reaction of 150 h, respectively. Characterization results revealed that doping with boron promoter could significantly increase the copper dispersion, enhance the metal-support interaction, maintain suitable Cu<sup>+</sup>/(Cu<sup>+</sup> + Cu<sup>0</sup>) ratio, and diminish metallic copper particles during the hydrogenation of DMO. Thus, this work introduced a bifunctional boron promoter, which could not only improve the copper dispersion, reduce the formation of bulk copper oxide, but also properly enhance the acidity of the sample surface, so that the Cu/SiO<sub>2</sub> sample could exhibit superior EG selectivity at low temperature, as well as improving the EtOH selectivity at high temperature. |
| first_indexed | 2024-03-10T03:27:11Z |
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| id | doaj.art-467ca1c0e47247c2b0710600b0cb9cc1 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T03:27:11Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-467ca1c0e47247c2b0710600b0cb9cc12023-11-23T09:49:49ZengMDPI AGNanomaterials2079-49912021-11-011112323610.3390/nano11123236Boron Modified Bifunctional Cu/SiO<sub>2</sub> Catalysts with Enhanced Metal Dispersion and Surface Acid Sites for Selective Hydrogenation of Dimethyl Oxalate to Ethylene Glycol and EthanolDeliang Yang0Runping Ye1Ling Lin2Rong Guo3Peiyu Zhao4Yanchao Yin5Wei Cheng6Wenpeng Yuan7Yuangen Yao8Biological Engineering Technology Innovation Center of Shandong Province, Heze Branch of Qilu University of Technology (Shandong Academy of Sciences), Heze 274000, ChinaKey Laboratory of Jiangxi Province for Environment and Energy Catalysis, Institute of Applied Chemistry, College of Chemistry, Nanchang University, Nanchang 330031, ChinaKey Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, ChinaKey Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, ChinaBiological Engineering Technology Innovation Center of Shandong Province, Heze Branch of Qilu University of Technology (Shandong Academy of Sciences), Heze 274000, ChinaBiological Engineering Technology Innovation Center of Shandong Province, Heze Branch of Qilu University of Technology (Shandong Academy of Sciences), Heze 274000, ChinaBiological Engineering Technology Innovation Center of Shandong Province, Heze Branch of Qilu University of Technology (Shandong Academy of Sciences), Heze 274000, ChinaBiological Engineering Technology Innovation Center of Shandong Province, Heze Branch of Qilu University of Technology (Shandong Academy of Sciences), Heze 274000, ChinaKey Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, ChinaBoron (B) promoter modified Cu/SiO<sub>2</sub> bifunctional catalysts were synthesized by sol-gel method and used to produce ethylene glycol (EG) and ethanol (EtOH) through efficient hydrogenation of dimethyl oxalate (DMO). Experimental results showed that boron promoter could significantly improve the catalytic performance by improving the structural characteristics of the Cu/SiO<sub>2</sub> catalysts. The optimized 2B-Cu/SiO<sub>2</sub> catalyst exhibited excellent low temperature catalytic activity and long-term stability, maintaining the average EG selectivity (Sel.<sub>EG</sub>) of 95% at 190 °C, and maintaining the average EtOH selectivity (Sel.<sub>EtOH</sub>) of 88% at 260 °C, with no decrease even after reaction of 150 h, respectively. Characterization results revealed that doping with boron promoter could significantly increase the copper dispersion, enhance the metal-support interaction, maintain suitable Cu<sup>+</sup>/(Cu<sup>+</sup> + Cu<sup>0</sup>) ratio, and diminish metallic copper particles during the hydrogenation of DMO. Thus, this work introduced a bifunctional boron promoter, which could not only improve the copper dispersion, reduce the formation of bulk copper oxide, but also properly enhance the acidity of the sample surface, so that the Cu/SiO<sub>2</sub> sample could exhibit superior EG selectivity at low temperature, as well as improving the EtOH selectivity at high temperature.https://www.mdpi.com/2079-4991/11/12/3236Cu/SiO<sub>2</sub> catalystsol-gel methodboron promoterdimethyl oxalate hydrogenationethylene glycolethanol |
| spellingShingle | Deliang Yang Runping Ye Ling Lin Rong Guo Peiyu Zhao Yanchao Yin Wei Cheng Wenpeng Yuan Yuangen Yao Boron Modified Bifunctional Cu/SiO<sub>2</sub> Catalysts with Enhanced Metal Dispersion and Surface Acid Sites for Selective Hydrogenation of Dimethyl Oxalate to Ethylene Glycol and Ethanol Nanomaterials Cu/SiO<sub>2</sub> catalyst sol-gel method boron promoter dimethyl oxalate hydrogenation ethylene glycol ethanol |
| title | Boron Modified Bifunctional Cu/SiO<sub>2</sub> Catalysts with Enhanced Metal Dispersion and Surface Acid Sites for Selective Hydrogenation of Dimethyl Oxalate to Ethylene Glycol and Ethanol |
| title_full | Boron Modified Bifunctional Cu/SiO<sub>2</sub> Catalysts with Enhanced Metal Dispersion and Surface Acid Sites for Selective Hydrogenation of Dimethyl Oxalate to Ethylene Glycol and Ethanol |
| title_fullStr | Boron Modified Bifunctional Cu/SiO<sub>2</sub> Catalysts with Enhanced Metal Dispersion and Surface Acid Sites for Selective Hydrogenation of Dimethyl Oxalate to Ethylene Glycol and Ethanol |
| title_full_unstemmed | Boron Modified Bifunctional Cu/SiO<sub>2</sub> Catalysts with Enhanced Metal Dispersion and Surface Acid Sites for Selective Hydrogenation of Dimethyl Oxalate to Ethylene Glycol and Ethanol |
| title_short | Boron Modified Bifunctional Cu/SiO<sub>2</sub> Catalysts with Enhanced Metal Dispersion and Surface Acid Sites for Selective Hydrogenation of Dimethyl Oxalate to Ethylene Glycol and Ethanol |
| title_sort | boron modified bifunctional cu sio sub 2 sub catalysts with enhanced metal dispersion and surface acid sites for selective hydrogenation of dimethyl oxalate to ethylene glycol and ethanol |
| topic | Cu/SiO<sub>2</sub> catalyst sol-gel method boron promoter dimethyl oxalate hydrogenation ethylene glycol ethanol |
| url | https://www.mdpi.com/2079-4991/11/12/3236 |
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