Stacking MFI zeolite structures for improved Sonogashira coupling reactions
- Authors
- Jia, Xicheng; Jiang, Dahong; Tsang, Daniel C. W.; Choi, Jungkyu; Yip, Alex C. K.
- Issue Date
- 1-3월-2019
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Stacking MFI zeolite; Mesoporous; Sonogashira coupling reaction; Stability; Durability
- Citation
- MICROPOROUS AND MESOPOROUS MATERIALS, v.276, pp.147 - 153
- Indexed
- SCIE
SCOPUS
- Journal Title
- MICROPOROUS AND MESOPOROUS MATERIALS
- Volume
- 276
- Start Page
- 147
- End Page
- 153
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/67036
- DOI
- 10.1016/j.micromeso.2018.09.039
- ISSN
- 1387-1811
- Abstract
- We designed a zeolite stacking structure by using hydraulic pressing and programmed temperature calcination synthesis procedures. ZSM-5 type zeolites with particle sizes of approximately 100 nm, 1 mu m and 2 mu m were used to synthesize stacking ZSM-5 with a size ranging from 45 to 63 mu m. The prepared ZSM-5 zeolite stacking structure was used as a support to deposit palladium. The performance of the palladium/stacking ZSM-5 was investigated on Sonogashira coupling reactions. Stacking samples with micro-sized units (1 mu m and 2 mu m) showed a 200-300% higher turnover number (TON) than their unit counterparts. However, stacking samples with nano-sized units (100 nm) showed decreased TON conversion compared with that of their unit counterparts, probably due to partial destruction of the nano-sized ZSM-5 structure during the stacking synthesis process at high temperature. The palladium/stacking ZSM-5 (micro-sized units) also showed better conversion on different bromides and alkynes than that of traditional homogenous catalysts. Moreover, the stacking composites showed good durability by recycling 4 runs without losing significant catalytic activity. The design of the stacking MFI structure exhibited improved catalytic activity, sustainability and hierarchical-resemblance properties.
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