Journal
JOURNAL OF CATALYSIS
Volume 385, Issue -, Pages 61-69Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2020.02.019
Keywords
Propane dehydrogenation; PtZn bimetallic nanoclusters; Confinement; Zeolite silicalite-1; Nanocatalysts
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Funding
- National Natural Science Foundation of China, china [21421001, 21573115, 21875118]
- Foundation of the State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering [2020-KF-21]
- Ph.D. Candidate Research Innovation Fund of the NKU School of Materials Science and Engineering
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Bimetallic catalysts have attracted increasing attention in propane dehydrogenation (PDH) due to the synergistic effect of metal species and considerably improved catalytic performance, but they often suffer from severe sintering and poor stability. Here, well-dispersed and ultrasmall PtZn bimetallic nanoclusters encapsulated in silicalite-1 (S-1) zeolites (named PtZn@S-1) are prepared via a facile in situ synthesis strategy. It is indicated that the PtZn bimetallic nanoclusters with ultrasmall size are homogeneously dispersed within the channels of S-1 zeolites. The 0.3Pt0.5Zn@S-1 catalyst shows excellent catalytic performance in PDH with a propane conversion of 45.3% and a propylene selectivity of >99%, and no visible sintering of PtZn bimetallic nanoclusters is observed in the long-term PDH reaction at 550 degrees C. The excellent catalytic properties and high stability of the ultrasmall bimetallic nanoclusters confined in zeolites create new prospects for PDH. (C) 2020 Elsevier Inc. All rights reserved.
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