| Operando dual beam ftir study of hydroxyl groups and zn species over defective hzsm-5 zeolite supported zinc catalysts | |
| Lin, Long1,2; Zhang, Xiaotong1,2; He, Ning1,2; Liu, Jiaxu1,2; Xin, Qin3; Guo, Hongchen1,2 | |
| 刊名 | Catalysts
 |
| 2019 | |
| 卷号 | 9期号:1页码:15 |
| 关键词 | Defective zsm-5 Hydroxyl nests Si(oh)al Zn(c2h5)(2) Chemical liquid deposition Operando dual beam ft-ir spectroscopy |
| ISSN号 | 2073-4344 |
| DOI | 10.3390/catal9010100 |
| 通讯作者 | Liu, jiaxu(liujiaxu@dlut.edu.cn) |
| 英文摘要 | A series of defective zsm-5 zeolites (similar to 300 nm, sio2/al2o3 ratio of 55, 100, 480 and 950) were systematically studied by xrd, sem, si-29 mas nmr, argon physisorption, nh3-tpd and ft-ir technologies. the nature, the amount and the accessibility of the acid sites of defective zsm-5 zeolites are greatly different from reported zsm-5 zeolites with a perfect crystal structure. the bronsted acid sites (si(oh)al) with strong acid strength and the bronsted acid sites (hydroxyl nests) with weak acid strength co-existed over defective zsm-5 zeolites, which leads to a unique catalytic function. zn(c2h5)(2) was grafted onto defective zsm-5 zeolites through the chemical liquid deposition (cld) method. interestingly, ft-ir spectroscopic studies found that zn(c2h5)(2) was preferentially grafted on the hydroxyl nests with weak acid strength rather than the si(oh)al groups with strong acid strength over different defective zsm-5 zeolites. in particular, home-built operando dual beam ftir-ms was applied to study the catalytic performance of zn species located in different sites of defective zsm-5 zeolites under real n-hexane transformation conditions. results show that zn species grafted over hydroxyl nests obtain better dehydrogenative aromatization performance than zn species over si(oh)al groups. this study provides guidance for the rational design of highly efficient alkane dehydrogenative aromatization catalysts. |
| WOS关键词 | BECKMANN REARRANGEMENT ; SILICALITE CHARACTERIZATION ; IR SPECTROSCOPY ; ACTIVE-SITES ; PROPANE ; METHANOL ; DEACTIVATION ; CAPACITY ; BETA ; MFI |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Physical |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:000459732000099 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2372783 |
| 专题 | 大连化学物理研究所 |
| 通讯作者 | Liu, Jiaxu |
| 作者单位 | 1.Dalian Univ Technol, State Key Lab Fine Chem, 2 Linggong Rd, Dalian 116024, Peoples R China 2.Dalian Univ Technol, Sch Chem Engn, 2 Linggong Rd, Dalian 116024, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lin, Long,Zhang, Xiaotong,He, Ning,et al. Operando dual beam ftir study of hydroxyl groups and zn species over defective hzsm-5 zeolite supported zinc catalysts[J]. Catalysts,2019,9(1):15. |
| APA | Lin, Long,Zhang, Xiaotong,He, Ning,Liu, Jiaxu,Xin, Qin,&Guo, Hongchen.(2019).Operando dual beam ftir study of hydroxyl groups and zn species over defective hzsm-5 zeolite supported zinc catalysts.Catalysts,9(1),15. |
| MLA | Lin, Long,et al."Operando dual beam ftir study of hydroxyl groups and zn species over defective hzsm-5 zeolite supported zinc catalysts".Catalysts 9.1(2019):15. |
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