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Synthesis of Dimethyl Carbonate from $CO_{2}$ and Methanol over Zr-Based Catalysts with Different Chemical Environments
| Content Provider | MDPI |
|---|---|
| Author | Huo, Linmeng Wang, Tian Xuan, Keng Li, Lei Pu, Yanfeng Li, Chenxin Qiao, Congzhen Yang, Hao Bai, Yan |
| Copyright Year | 2021 |
| Description | The adsorption and activation of both $CO_{2}$ and methanol are mainly affected by the distance of the Lewis acid site, $Zr^{4+}$, and Lewis base, $Zr^{4+}/O^{2−}$, of the Zr-based catalysts. In this paper, Zr-incorporated SBA-15 (Zr-SBA-15) and Zr-grafted SBA-15 (Zr/SBA-15) catalysts were prepared with different Zr environments, and were analyzed with $N_{2}$ adsorption–desorption isotherms, X-ray diffraction, UV-vis spectra, and XPS. It was proposed that Zr-SBA-15 catalyst with Si-O-Zr-OH and Zr-O-Si-OH structure exhibited non-adjacent sites between $Zr^{4+}$ and $Zr^{4+}/O^{2−}$, while Zr/SBA-15 catalyst with Zr-O-Zr-OH structure showed neighboring sites between $Zr^{4+}$ and $Zr^{4+}/O^{2−}$. Furthermore, the Zr/SBA-15 catalyst exhibited good catalytic activity, while no DMC was detected over the Zr-SBA-15 catalyst at the same reaction conditions. For combined in situ infrared and catalytic performance, it was indicated that the methanol and $CO_{2}$ could be activated to form DMC, only when the $Zr^{4+}$ and $Zr^{4+}/O^{2−}$ sites existed and were adjacent to each other in the Zr-O-Zr-OH of Zr/SBA-15 catalyst. |
| Starting Page | 710 |
| e-ISSN | 20734344 |
| DOI | 10.3390/catal11060710 |
| Journal | Catalysts |
| Issue Number | 6 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-06-06 |
| Access Restriction | Open |
| Subject Keyword | Catalysts Applied Chemistry Dimethyl Carbonate in Situ Ftir Spectra Zro2-grafted Sba-15 Zr-incorporated Sba-15 Carbon Dioxide |
| Content Type | Text |
| Resource Type | Article |
