Selective Semihydrogenation of Alkynes on Shape-Controlled Palladium Nanocrystals

Authors

  • Jooyoung Chung,

    1. Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-747 (Korea), Fax: (+82) 2-872-7505
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    • These authors contributed equally to this work.

  • Chanhoi Kim,

    1. World Class University (WCU) program of Chemical Convergence for Energy & environment (C2E2), School of Chemical and Biological Engineering, Seoul National University, Seoul 151-747 (Korea)
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    • These authors contributed equally to this work.

  • Hansaem Jeong,

    1. Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-747 (Korea), Fax: (+82) 2-872-7505
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  • Prof. Taekyung Yu,

    1. Department of Chemical Engineering, College of Engineering, Kyung Hee University, Youngin 446-701 (Korea)
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  • Do Huy Binh,

    1. School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746 (Korea)
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  • Prof. Jyongsik Jang,

    Corresponding author
    1. World Class University (WCU) program of Chemical Convergence for Energy & environment (C2E2), School of Chemical and Biological Engineering, Seoul National University, Seoul 151-747 (Korea)
    • Jyongsik Jang, World Class University (WCU) program of Chemical Convergence for Energy & environment (C2E2), School of Chemical and Biological Engineering, Seoul National University, Seoul 151-747 (Korea)

      Jaichan Lee, School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746 (Korea)

      B. Moon Kim, Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-747 (Korea), Fax: (+82) 2-872-7505

      Byungkwon Lim, School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746 (Korea)

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  • Prof. Jaichan Lee,

    Corresponding author
    1. School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746 (Korea)
    • Jyongsik Jang, World Class University (WCU) program of Chemical Convergence for Energy & environment (C2E2), School of Chemical and Biological Engineering, Seoul National University, Seoul 151-747 (Korea)

      Jaichan Lee, School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746 (Korea)

      B. Moon Kim, Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-747 (Korea), Fax: (+82) 2-872-7505

      Byungkwon Lim, School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746 (Korea)

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  • Prof.  B. Moon Kim,

    Corresponding author
    1. Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-747 (Korea), Fax: (+82) 2-872-7505
    • Jyongsik Jang, World Class University (WCU) program of Chemical Convergence for Energy & environment (C2E2), School of Chemical and Biological Engineering, Seoul National University, Seoul 151-747 (Korea)

      Jaichan Lee, School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746 (Korea)

      B. Moon Kim, Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-747 (Korea), Fax: (+82) 2-872-7505

      Byungkwon Lim, School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746 (Korea)

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  • Prof. Byungkwon Lim

    Corresponding author
    1. School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746 (Korea)
    • Jyongsik Jang, World Class University (WCU) program of Chemical Convergence for Energy & environment (C2E2), School of Chemical and Biological Engineering, Seoul National University, Seoul 151-747 (Korea)

      Jaichan Lee, School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746 (Korea)

      B. Moon Kim, Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-747 (Korea), Fax: (+82) 2-872-7505

      Byungkwon Lim, School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746 (Korea)

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Abstract

A systematic study on the selective semihydrogenation of alkynes to alkenes on shape-controlled palladium (Pd) nanocrystals was performed. Pd nanocrystals with a cubic shape and thus exposed {100} facets were synthesized in an aqueous solution through the reduction of Na2PdCl4 with L-ascorbic acid in the presence of bromide ions. The Pd nanocubes were tested as catalysts for the semihydrogenation of various alkynes such as 5-decyne, 2-butyne-1,4-diol, and phenylacetylene. For all substrates, the Pd nanocubes exhibited higher alkene selectivity (>90 %) than a commercial Pd/C catalyst (75–90 %), which was attributed to a large adsorption energy of the carbon–carbon triple bond on the {100} facets of the Pd nanocubes. Our approach based on the shape control of Pd nanocrystals offers a simple and effective route to the development of a highly selective catalyst for alkyne semihydrogenation.

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