Efficient Synthesis of Methyl Methacrylate by One Step Oxidative Esterification over Zn-Al-Mixed Oxides Supported Gold Nanocatalysts
Methyl methacrylate (MMA) is an important monomer in fine chemicals. The synthesis of MMA by one-step oxidative esterification from methacrolein with methanol over a heterogeneous catalyst with high activity, selectivity and stability is highly desirable. Herein, Zn-Al-hydrotalcites (HTs)-supported...
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MDPI AG
2021-01-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/11/2/162 |
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| author | Huayin Li Yuan Tan Xingkun Chen Wenshao Yang Chuanqi Huang Jie Li Yunjie Ding |
| author_facet | Huayin Li Yuan Tan Xingkun Chen Wenshao Yang Chuanqi Huang Jie Li Yunjie Ding |
| author_sort | Huayin Li |
| collection | DOAJ |
| description | Methyl methacrylate (MMA) is an important monomer in fine chemicals. The synthesis of MMA by one-step oxidative esterification from methacrolein with methanol over a heterogeneous catalyst with high activity, selectivity and stability is highly desirable. Herein, Zn-Al-hydrotalcites (HTs)-supported atomically precise Au<sub>25</sub> nanoclusters with different molar ratios of Zn<sup>2+</sup>/Al<sup>3+</sup> were prepared and used as the precursors for this reaction. They exhibited good performances in comparison with the gold catalysts prepared by the deposition precipitation method. The structural and electronic properties were evaluated by various characterization technologies, including X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), in situ diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS) of CO adsorption, X-ray photoelectron spectroscopy (XPS), and CO<sub>2</sub> temperature-programmed desorption (TPD). The combined characterization results suggested that the adsorption property of gold and the basicity of the catalyst contributes to their high activities. Substrates extended experiments and stability tests implied the potential application of Zn-Al-mixed oxides supported gold catalysts, which paves a new way for supported gold catalyst in the one-step oxidation esterification reaction. |
| first_indexed | 2024-03-09T03:46:33Z |
| format | Article |
| id | doaj.art-840d1650f9ac49a1b65d55e54fe1c0f9 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-09T03:46:33Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-840d1650f9ac49a1b65d55e54fe1c0f92023-12-03T14:33:58ZengMDPI AGCatalysts2073-43442021-01-0111216210.3390/catal11020162Efficient Synthesis of Methyl Methacrylate by One Step Oxidative Esterification over Zn-Al-Mixed Oxides Supported Gold NanocatalystsHuayin Li0Yuan Tan1Xingkun Chen2Wenshao Yang3Chuanqi Huang4Jie Li5Yunjie Ding6Hangzhou Institute of Advanced studies, Zhejiang Normal University, Hangzhou 311231, ChinaHangzhou Institute of Advanced studies, Zhejiang Normal University, Hangzhou 311231, ChinaHangzhou Institute of Advanced studies, Zhejiang Normal University, Hangzhou 311231, ChinaHangzhou Institute of Advanced studies, Zhejiang Normal University, Hangzhou 311231, ChinaHangzhou Institute of Advanced studies, Zhejiang Normal University, Hangzhou 311231, ChinaHangzhou Institute of Advanced studies, Zhejiang Normal University, Hangzhou 311231, ChinaHangzhou Institute of Advanced studies, Zhejiang Normal University, Hangzhou 311231, ChinaMethyl methacrylate (MMA) is an important monomer in fine chemicals. The synthesis of MMA by one-step oxidative esterification from methacrolein with methanol over a heterogeneous catalyst with high activity, selectivity and stability is highly desirable. Herein, Zn-Al-hydrotalcites (HTs)-supported atomically precise Au<sub>25</sub> nanoclusters with different molar ratios of Zn<sup>2+</sup>/Al<sup>3+</sup> were prepared and used as the precursors for this reaction. They exhibited good performances in comparison with the gold catalysts prepared by the deposition precipitation method. The structural and electronic properties were evaluated by various characterization technologies, including X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), in situ diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS) of CO adsorption, X-ray photoelectron spectroscopy (XPS), and CO<sub>2</sub> temperature-programmed desorption (TPD). The combined characterization results suggested that the adsorption property of gold and the basicity of the catalyst contributes to their high activities. Substrates extended experiments and stability tests implied the potential application of Zn-Al-mixed oxides supported gold catalysts, which paves a new way for supported gold catalyst in the one-step oxidation esterification reaction.https://www.mdpi.com/2073-4344/11/2/162gold clusterhydrotalcitemethacroleinmethyl methacrylateoxidative esterification |
| spellingShingle | Huayin Li Yuan Tan Xingkun Chen Wenshao Yang Chuanqi Huang Jie Li Yunjie Ding Efficient Synthesis of Methyl Methacrylate by One Step Oxidative Esterification over Zn-Al-Mixed Oxides Supported Gold Nanocatalysts Catalysts gold cluster hydrotalcite methacrolein methyl methacrylate oxidative esterification |
| title | Efficient Synthesis of Methyl Methacrylate by One Step Oxidative Esterification over Zn-Al-Mixed Oxides Supported Gold Nanocatalysts |
| title_full | Efficient Synthesis of Methyl Methacrylate by One Step Oxidative Esterification over Zn-Al-Mixed Oxides Supported Gold Nanocatalysts |
| title_fullStr | Efficient Synthesis of Methyl Methacrylate by One Step Oxidative Esterification over Zn-Al-Mixed Oxides Supported Gold Nanocatalysts |
| title_full_unstemmed | Efficient Synthesis of Methyl Methacrylate by One Step Oxidative Esterification over Zn-Al-Mixed Oxides Supported Gold Nanocatalysts |
| title_short | Efficient Synthesis of Methyl Methacrylate by One Step Oxidative Esterification over Zn-Al-Mixed Oxides Supported Gold Nanocatalysts |
| title_sort | efficient synthesis of methyl methacrylate by one step oxidative esterification over zn al mixed oxides supported gold nanocatalysts |
| topic | gold cluster hydrotalcite methacrolein methyl methacrylate oxidative esterification |
| url | https://www.mdpi.com/2073-4344/11/2/162 |
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