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

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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.

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Acknowledgements

This work was financially supported by the National Key Research and Development Program of China (No. 2020YFA0210900), the Science and Technology Key Project of Guangdong Province (No. 2020B010188002), the National Natural Science Foundation of China (Nos. 21905313 and 21938001), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (No. 2017BT01C102). The authors thank to XPS measurement in surface and structure analysis platform of Instrumental Analysis & Research Center, Sun Yat-sen University. Thanks to eceshi (www.eceshi.com) for the ICP test.

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Authors and Affiliations

  1. Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China

    Jie Zhou, Ying Zhang, Hao Liu, Chao Xiong, Peng Hu, Hao Wang, Shenwei Chen & Hongbing Ji

  2. Huizhou Research Institute, Sun Yat-sen University, Huizhou, 516081, China

    Shenwei Chen & Hongbing Ji

  3. College of Chemical Engineering, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou, 310014, China

    Hongbing Ji

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  1. Jie Zhou
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Correspondence to Shenwei Chen or Hongbing Ji.

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Zhou, J., Zhang, Y., Liu, H. et al. Enhanced performance for propane dehydrogenation through Pt clusters alloying with copper in zeolite. Nano Res. 16, 6537–6543 (2023). https://doi.org/10.1007/s12274-022-5317-z

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