Confining platinum clusters in indium-modified ZSM-5 zeolite to promote propane dehydrogenation

Yong Yuan, Erwei Huang, Sooyeon Hwang, Ping Liu () and Jingguang G. Chen ()
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Yong Yuan: Brookhaven National Laboratory
Erwei Huang: Brookhaven National Laboratory
Sooyeon Hwang: Brookhaven National Laboratory
Ping Liu: Brookhaven National Laboratory
Jingguang G. Chen: Brookhaven National Laboratory

Nature Communications, 2024, vol. 15, issue 1, 1-15

Abstract: Abstract Designing highly active and stable catalytic sites is often challenging due to the complex synthesis procedure and the agglomeration of active sites during high-temperature reactions. Here, we report a facile two-step method to synthesize Pt clusters confined by In-modified ZSM-5 zeolite. In-situ characterization confirms that In is located at the extra-framework position of ZSM-5 as In+, and the Pt clusters are stabilized by the In-ZSM-5 zeolite. The resulting Pt clusters confined in In-ZSM-5 show excellent propane conversion, propylene selectivity, and catalytic stability, outperforming monometallic Pt, In, and bimetallic PtIn alloys. The incorporation of In+ in ZSM-5 neutralizes Brønsted acid sites to inhibit side reactions, as well as tunes the electronic properties of Pt clusters to facilitate propane activation and propylene desorption. The strategy of combining precious metal clusters with metal cation-exchanged zeolites opens the avenue to develop stable heterogeneous catalysts for other reaction systems.

Date: 2024
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DOI: 10.1038/s41467-024-50709-y

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