Intra-crystalline mesoporous zeolite encapsulation-derived thermally robust metal nanocatalyst in deep oxidation of light alkanes

Honggen Peng (), Tao Dong, Shenyou Yang, Hao Chen, Zhenzhen Yang, Wenming Liu, Chi He (), Peng Wu, Jinshu Tian, Yue Peng, Xuefeng Chu, Daishe Wu, Taicheng An (), Yong Wang and Sheng Dai ()
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Honggen Peng: Nanchang University
Tao Dong: Nanchang University
Shenyou Yang: Nanchang University
Hao Chen: Oak Ridge National Laboratory
Zhenzhen Yang: Oak Ridge National Laboratory
Wenming Liu: Nanchang University
Chi He: Xi’an Jiaotong University
Peng Wu: East China Normal University
Jinshu Tian: Zhejiang University of Technology
Yue Peng: Tsinghua University
Xuefeng Chu: Tsinghua University
Daishe Wu: Nanchang University
Taicheng An: Institute of Environmental Health and Pollution Control, Guangdong University of Technology
Yong Wang: Washington State University
Sheng Dai: Oak Ridge National Laboratory

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Zeolite-confined metal nanoparticles (NPs) have attracted much attention owing to their superior sintering resistance and broad applications for thermal and environmental catalytic reactions. However, the pore size of the conventional zeolites is usually below 2 nm, and reactants are easily blocked to access the active sites. Herein, a facile in situ mesoporogen-free strategy is developed to design and synthesize palladium (Pd) NPs enveloped in a single-crystalline zeolite (silicalite-1, S-1) with intra-mesopores (termed Pd@IM-S-1). Pd@IM-S-1 exhibited remarkable light alkanes deep oxidation performances, and it should be attributed to the confinement and guarding effect of the zeolite shell and the improvement in mass-transfer efficiency and active metal sites accessibility. The Pd−PdO interfaces as a new active site can provide active oxygen species to the first C−H cleavage of light alkanes. This work exemplifies a promising strategy to design other high-performance intra-crystalline mesoporous zeolite-confined metal/metal oxide catalysts for high-temperature industrial thermal catalysis.

Date: 2022
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DOI: 10.1038/s41467-021-27828-x

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