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Seung Won, Han
나노물질 및 화학반응 연구단
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PtZn Intermetallic Compound Nanoparticles in Mesoporous Zeolite Exhibiting High Catalyst Durability for Propane Dehydrogenation

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Title
PtZn Intermetallic Compound Nanoparticles in Mesoporous Zeolite Exhibiting High Catalyst Durability for Propane Dehydrogenation
Author(s)
Seung Won Han; Hongjun Park; Jongho Han; Jeong-Chul Kim; John Lee; Jo, Changbum; Ryong Ryoo
Publication Date
2021-08
Journal
ACS CATALYSIS, v.11, no.15, pp.9233 - 9241
Publisher
American Chemical Society
Abstract
© 2021 American Chemical Society.A PtZn alloy nanoparticle catalyst for propane dehydrogenation was synthesized by simple coimpregnation of Pt(NH3)4(NO3)2 with Zn(NO3)2 onto a mesoporous material, which was built with siliceous MFI zeolite nanosheets. This mesoporous zeolite-supported PtZn catalyst exhibited high activity and selectivity with remarkably long catalytic lifetime compared with other PtZn catalysts loaded on γ-alumina, MCM-48 mesoporous silica, silica gel, and bulk MFI zeolite. When measured under a high-purity propane flow at 580 °C, the PtZn/mesoporous zeolite catalyst with metal loadings of 0.7 wt % Pt and 0.7 wt % Zn lasted for more than 20 days before the propane conversion decreased to half of its initial value. In comparison, other PtZn catalysts were deactivated almost completely within a few days. Atomic-resolution scanning transmission electron microscopic analysis revealed that the mesoporous zeolite contained finely dispersed Pt1Zn1 intermetallic compound-type alloy nanoparticles, which could effectively suppress catalyst deactivation. The mesoporous structure and the surface silanol groups of the MFI zeolite are suggested to play an important role in promoting the formation of intermetallic alloy nanoparticles.
URI
https://pr.ibs.re.kr/handle/8788114/10180
DOI
10.1021/acscatal.1c01808
ISSN
2155-5435
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > 1. Journal Papers (저널논문)
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