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Download fileA General Strategy for Fabricating Isolated Single Metal Atomic Site Catalysts in Y Zeolite
journal contribution
posted on 2019-05-22, 00:00 authored by Yiwei Liu, Zhi Li, Qiuying Yu, Yanfei Chen, Ziwei Chai, Guofeng Zhao, Shoujie Liu, Weng-Chon Cheong, Yuan Pan, Qinghua Zhang, Lin Gu, Lirong Zheng, Yu Wang, Yong Lu, Dingsheng Wang, Chen Chen, Qing Peng, Yunqi Liu, Limin Liu, Jiesheng Chen, Yadong LiExploring high-performance
zeolite-supported metal catalysts is
of great significance. Herein, we develop a strategy for fabricating
isolated single metal atomic site catalysts in Y zeolite (M-ISAS@Y,
M = Pt, Pd, Ru, Rh, Co, Ni, Cu) by in situ separating and confining
a metal–ethanediamine complex into β-cages during the
crystallization process followed by thermal treatment. The M-ISAS
are stabilized by skeletal oxygens of Y zeolite, and the crystallinity,
porosity, and large surface area are well inherited in M-ISAS@Y. As
a demonstration, acidic Pt-ISAS@Y is used for n-hexane
isomerization involving consecutive catalytic dehydrogenation/hydrogenation
on Pt-ISAS and isomerization on Brønsted acid sites. The turnover
frequency value of Pt-ISAS reaches 727 h–1, 5 times
more than Pt nanoparticles (∼3.5 nm), with a total isomer selectivity
of more than 98%. This strategy provides a convenient route to fabricate
promising zeolite-based M-ISAS catalysts for industrial applications.
