A CaMnAl-hydrotalcite solid basic catalyst toward the aldol condensation reaction with a comparable level to liquid alkali catalysts
文献类型：期刊论文
| 作者 | Zheng, L ; Bing, WH; Wang, HM; Zheng L(郑雷); Zheng LR(郑黎荣); Rao, DM; Yang, YS; Zheng, LR; Wang, B; Wang, YD
|
| 刊名 | GREEN CHEMISTRY
 |
| 出版日期 | 2018 |
| 卷号 | 20期号:13页码:3071-3080 |
| ISSN号 | 1463-9262 |
| DOI | 10.1039/c8gc00851e |
| 文献子类 | Article |
| 英文摘要 | In a number of heterogeneous catalysis processes, the promotion effect toward active sites is of vital importance and remains a challenge to obtain largely-improved catalytic performance. Herein, rehydrated Ca4MnxAl-layered double hydroxides (denoted as re-Ca4MnxAl-LDH) were prepared based on a structure memory effect of LDH precursors, which exhibited extremely high heterogeneous catalytic performance for the aldol condensation reaction, with the assistance of the promotion effect of Mn. A combination study including XRD, EXAFS, XPS, CDCl3-FTIR and DFT calculations confirms that re-Ca4MnxAl-LDH samples with Ca-O-Mn-IV structure show a highly-exposed Ca2+ s-orbital and strengthened coordination between Ca2+ with 7-fold OH-, providing a weakened BrOnsted basic site compared with the reference sample re-Ca4Al-LDH. The optimized re-Ca4Mn0.5Al-LDH catalyst exhibits prominent catalytic performance toward the condensation of isobutyraldehyde (IBD) and formaldehyde (FA) to produce hydroxypivaldehyde (HPA), with a HPA yield of 70.3%. This is significantly higher than re-Ca4Al-LDHs (63.3%) and even comparable to the level of liquid alkali catalysts (73.2%). Studies on the structure-property correlation reveal that the weakened basic site originating from Ca-O-Mn-IV serves as a promoted active center, which accelerates the product desorption and thus largely improves HPA selectivity. This promoted re-Ca4Mn0.5Al-LDH catalyst can be potentially applied as a promising candidate in heterogeneous aldol condensation reactions. |
| 电子版国际标准刊号 | 1463-9270 |
| WOS关键词 | BIRNESSITE-TYPE MNO2 ; OXIDATION ; TEMPERATURE ; ACETONE ; FORMALDEHYDE ; METHANOL ; COMPLEX ; VACANCY |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000437187500018 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286088]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 通讯作者 | Zheng LR(郑黎荣) |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Zheng, L,Bing, WH,Wang, HM,et al. A CaMnAl-hydrotalcite solid basic catalyst toward the aldol condensation reaction with a comparable level to liquid alkali catalysts[J]. GREEN CHEMISTRY,2018,20(13):3071-3080. |
| APA | Zheng, L.,Bing, WH.,Wang, HM.,郑雷.,郑黎荣.,...&Wei, M.(2018).A CaMnAl-hydrotalcite solid basic catalyst toward the aldol condensation reaction with a comparable level to liquid alkali catalysts.GREEN CHEMISTRY,20(13),3071-3080. |
| MLA | Zheng, L,et al."A CaMnAl-hydrotalcite solid basic catalyst toward the aldol condensation reaction with a comparable level to liquid alkali catalysts".GREEN CHEMISTRY 20.13(2018):3071-3080. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。