TY - JOUR
T1 - Stacking MFI zeolite structures for improved Sonogashira coupling reactions
AU - Jia, Xicheng
AU - Jiang, Dahong
AU - Tsang, Daniel C.W.
AU - Choi, Jungkyu
AU - Yip, Alex C.K.
N1 - Funding Information:
The authors would like to thank the financial support from the State Scholarship Fund CSC in China (grant number: 201508440447 ) and the Hong Kong Research Grants Council (PolyU 15222115 and 15223517 ) for this study.
Funding Information:
The authors would like to thank the financial support from the State Scholarship Fund CSC in China (grant number: 201508440447) and the Hong Kong Research Grants Council (PolyU 15222115 and 15223517) for this study.
PY - 2019/3/1
Y1 - 2019/3/1
N2 - 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 μm and 2 μm were used to synthesize stacking ZSM-5 with a size ranging from 45 to 63 μm. 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 μm and 2 μm) 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.
AB - 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 μm and 2 μm were used to synthesize stacking ZSM-5 with a size ranging from 45 to 63 μm. 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 μm and 2 μm) 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.
KW - Durability
KW - Mesoporous
KW - Sonogashira coupling reaction
KW - Stability
KW - Stacking MFI zeolite
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U2 - 10.1016/j.micromeso.2018.09.039
DO - 10.1016/j.micromeso.2018.09.039
M3 - Article
AN - SCOPUS:85054312715
VL - 276
SP - 147
EP - 153
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
ER -