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Title: Zeolite-Encapsulated Pt Nanoparticles for Tandem Catalysis

Abstract

Encapsulation of metal nanoparticles in a zeolite matrix is a promising route to integrate multiple sequential reactions into a one-pot and one-step tandem catalytic reaction. We report a cationic polymer-assisted synthetic strategy to encapsulate Pt nanoparticles (NPs) into MFI zeolites. Degrees of encapsulation of Pt NPs in the synthesized catalysts exceeding 90% were demonstrated via kinetic studies of model reactions involving substrates with different molecular dimensions. HZSM-5 zeolite-encapsulated Pt NPs are able to selectively mediate the tandem Aldol condensation and hydrogenation of furfural and acetone to form hydrogenated C8 products with a combined yield of 87%. In contrast, hydrogenation and decarbonylation of furfural dominate on Pt NPs supported on HZSM-5 at otherwise identical conditions. The high selectivity towards the tandem reaction on the encapsulated catalyst is attributed to the distribution of metal and acid sites, which limits the access of furfural to Pt sites and promotes the acid-catalyzed Aldol condensation. This is the first demonstration that the product distribution in a tandem reaction is manipulated by tailoring the architecture of catalytic materials via encapsulation.

Authors:
 [1];  [1];  [2]; ORCiD logo [2]; ORCiD logo [1]
  1. Univ. of Delaware, Newark, DE (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Catalysis Center for Energy Innovation (CCEI); Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1495319
Report Number(s):
BNL-211286-2019-JAAM
Journal ID: ISSN 0002-7863
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Volume: 140; Journal Issue: 41; Journal ID: ISSN 0002-7863
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Pt Nanoparticles; Zeolite; Encapsulation

Citation Formats

Cho, Hong Je, Kim, Doyoung, Li, Jing, Su, Dong, and Xu, Bingjun. Zeolite-Encapsulated Pt Nanoparticles for Tandem Catalysis. United States: N. p., 2018. Web. doi:10.1021/jacs.8b09568.
Cho, Hong Je, Kim, Doyoung, Li, Jing, Su, Dong, & Xu, Bingjun. Zeolite-Encapsulated Pt Nanoparticles for Tandem Catalysis. United States. doi:10.1021/jacs.8b09568.
Cho, Hong Je, Kim, Doyoung, Li, Jing, Su, Dong, and Xu, Bingjun. Fri . "Zeolite-Encapsulated Pt Nanoparticles for Tandem Catalysis". United States. doi:10.1021/jacs.8b09568. https://www.osti.gov/servlets/purl/1495319.
@article{osti_1495319,
title = {Zeolite-Encapsulated Pt Nanoparticles for Tandem Catalysis},
author = {Cho, Hong Je and Kim, Doyoung and Li, Jing and Su, Dong and Xu, Bingjun},
abstractNote = {Encapsulation of metal nanoparticles in a zeolite matrix is a promising route to integrate multiple sequential reactions into a one-pot and one-step tandem catalytic reaction. We report a cationic polymer-assisted synthetic strategy to encapsulate Pt nanoparticles (NPs) into MFI zeolites. Degrees of encapsulation of Pt NPs in the synthesized catalysts exceeding 90% were demonstrated via kinetic studies of model reactions involving substrates with different molecular dimensions. HZSM-5 zeolite-encapsulated Pt NPs are able to selectively mediate the tandem Aldol condensation and hydrogenation of furfural and acetone to form hydrogenated C8 products with a combined yield of 87%. In contrast, hydrogenation and decarbonylation of furfural dominate on Pt NPs supported on HZSM-5 at otherwise identical conditions. The high selectivity towards the tandem reaction on the encapsulated catalyst is attributed to the distribution of metal and acid sites, which limits the access of furfural to Pt sites and promotes the acid-catalyzed Aldol condensation. This is the first demonstration that the product distribution in a tandem reaction is manipulated by tailoring the architecture of catalytic materials via encapsulation.},
doi = {10.1021/jacs.8b09568},
journal = {Journal of the American Chemical Society},
number = 41,
volume = 140,
place = {United States},
year = {2018},
month = {9}
}

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