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Research Article

Enhanced performance for propane dehydrogenation through Pt clusters alloying with copper in zeolite

Jie Zhou1, Ying Zhang1, Hao Liu1, Chao Xiong1, Peng Hu1, Hao Wang1, Shenwei Chen1,2( ), Hongbing Ji1,2,3( )
Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
Huizhou Research Institute, Sun Yat-sen University, Huizhou 516081, China
College of Chemical Engineering, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China
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Graphical Abstract

We describe a novel method to synthesize Pt clusters alloying with copper in zeolite for propane dehydrogenation. In particular, 0.1Pt0.4CuK@S-1 exhibits a propane conversion of 24.79% with 98.20% selectivity of propene, and the specific activity of propylene formation is up to 32 mol·gPt–1·h–1 at 500 °C. No obvious deactivation is observed even after 73 h on stream, affording an extremely low deactivation constant of 0.00032 h–1.

Abstract

Metal alloys have been widely applied for heterogeneous catalysis, especially alkane dehydrogenation. However, the catalysts always suffer from sintering and coke deposition due to the rigorous reaction conditions. Herein, we described an original approach to prepare a catalyst where highly dispersed Pt clusters alloying with copper were encapsulated in silicalite-1 (S-1) zeolite for propane dehydrogenation (PDH). The introduction of Cu species significantly enhances the catalytic activity and prolongs the lifetime of the catalyst. 0.1Pt0.4CuK@S-1 exhibits a propane conversion of 24.8% with 98.2% selectivity of propene, and the specific activity of propylene formation is up to 32 mol·gPt−1·h−1 at 500 °C. No obvious deactivation is observed even after 73 h on stream, affording an extremely low deactivation constant of 0.00032 h−1. The excellent activity and stability are ascribed to the confinement of zeolites and the stabilization of Cu species for Pt clusters.

Keywords

specific activitypropane dehydrogenationHighly dispersed Pt clusterssilicalite-1 (S-1) zeolitelow deactivation constant

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Nano Research
Volume 16 Issue 5,
May 2023
Pages 6537-6543
DOI: 10.1007/s12274-022-5317-z
Cite this article:
Zhou J, Zhang Y, Liu H, et al. Enhanced performance for propane dehydrogenation through Pt clusters alloying with copper in zeolite. Nano Research, 2023, 16(5): 6537-6543. https://doi.org/10.1007/s12274-022-5317-z
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Received: 06 September 2022
Revised: 26 October 2022
Accepted: 10 November 2022
Published: 21 January 2023
© Tsinghua University Press 2022
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