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Pd single-atom catalysts derived from strong metal-support interaction for selective hydrogenation of acetylene

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Abstract

Selective hydrogenation of acetylene in excess ethylene is an important reaction in both fundamental study and practical application. Pd-based catalysts with high intrinsic activity are commonly employed, but usually suffer from low selectivity. Pd single-atom catalysts (SACs) usually exhibit outstanding ethylene selectivity due to the weak π-bonding ethylene adsorption. However, the preparation of high-loading and stable Pd SACs is still confronted with a great challenge. In this work, we report a simple strategy to fabricate Pd SACs by means of reducing conventional supported Pd catalysts at suitable temperatures to selectively encapsulate the co-existed Pd nanoparticles (NPs)/clusters. This is based on our new finding that single atoms only manifest strong metal-support interaction (SMSI) at higher reduction temperature than that of NPs/clusters. The derived Pd SACs (Pd1/CeO2 and Pd1/α-Fe2O3) were applied to acetylene selective hydrogenation, exhibiting much improved ethylene selectivity and high stability. This work offers a promising way to develop stable Pd SACs easily.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 21972135, 21961142006, and 51701201), CAS Project for Young Scientists in Basic Research (No. YSBR-022), and the National Key Research and Development Program of China (No. 2021YFA1500503).

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  1. CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China

    Yalin Guo, Yangyang Li, Lin Li & Botao Qiao

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Yalin Guo & Yangyang Li

  3. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, China

    Xiaorui Du

  4. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China

    Qike Jiang

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  1. Yalin Guo
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Guo, Y., Li, Y., Du, X. et al. Pd single-atom catalysts derived from strong metal-support interaction for selective hydrogenation of acetylene. Nano Res. 15, 10037–10043 (2022). https://doi.org/10.1007/s12274-022-4376-5

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