Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 322, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2021.111161
Keywords
Noble metal nanoparticles; Zeolite; Hydrothermal synthesis; Biomass conversion; Selective hydrogenation
Categories
Funding
- National Natural Science Foundation of China [22072065, U1662107, 21476109]
- Six Talent Peaks Project in Jiangsu Province [JNHB-035]
- Natural Science Foundation of Jiangsu Province [BK20200688]
- China Postdoctoral Science Foundation [2020M681572]
- Project of Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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In this study, highly dispersive Pd nanoparticles were successfully encapsulated within a pure silica zeolite matrix. The champion catalyst Pd-Si-ZSM-22 exhibited high catalytic efficiency with excellent selectivity and stability, making it a promising candidate for hydrogenation reactions.
Fabrication of robust noble metal nanoparticles (NPs) usually suffers from instability due to the large surface energy of small particles. Herein, highly dispersive Pd nanoparticles (average size: similar to 3 nm) with controllable content were directly encapsulated within pure silica zeolite matrix with TON topology via a dry gel conversion pathway, in which 1-butyl-3-methylimidazolium bromide and (3-mercaptopropyl) trimethoxysilane were utilized as the structure-directing agent and metal stabilizer, respectively. High crystallinity and large surface area were reached over this Pd containing zeolites. The champion catalyst Pd-Si-ZSM-22 effectively catalyzed the transformation of furfuryl alcohol into tetrahydrofurfuryl alcohol via hydrogenation by using H-2. High conversion (>99%) and selectivity (>99%) were reached with large turnover numbers and the stable activity was observable during the recycling test. The comparison with the post-impregnated counterpart indicates that the straightforward synthesis is favorable for the construction of stable and robust Pd species within the confined microchannels of TON zeolites.
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