催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (7): 1149-1155.DOI: 10.1016/S1872-2067(10)60238-0

• 研究论文 • 上一篇    下一篇

Comparison of the Catalytic Properties of 25-Atom Gold Nanospheres and Nanorods

Yan ZHU, Huifeng QIAN, Anindita DAS, Rongchao JIN*   

  1. Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, USA
  • 收稿日期:2011-02-08 修回日期:2011-04-06 出版日期:2011-07-18 发布日期:2014-11-28

Comparison of the Catalytic Properties of 25-Atom Gold Nanospheres and Nanorods

Yan ZHU, Huifeng QIAN, Anindita DAS, Rongchao JIN*   

  1. Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, USA
  • Received:2011-02-08 Revised:2011-04-06 Online:2011-07-18 Published:2014-11-28

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摘要： The catalytic properties of two nanocluster catalysts with atomically precisely known structures, icosahedral two-shelled Au25(SC2H4Ph)18 nanospheres and biicosahedral Au25(PPh3)10(SC2H4Ph)5Cl2 nanorods, were compared. Their catalytic performance in the two reactions of the selective oxidation of styrene and chemoselective hydrogenation of α,β-unsaturated benzalacetone was investigated. The catalytic activities of icosahedral Au25(SC2H4Ph)18 nanospheres were superior to those of the bi-icosahedral Au25(PPh3)10(SC2H4Ph)5Cl2 nanorods for both reactions. The better catalytic performance of the Au25(SC2H4Ph)18 nanospheres can be attributed to their unique core-shell (Au13/Au12) geometric structure that has an open exterior atomic shell and to their electronic structure with an electron-rich Au13 core and an electron-deficient Au12 shell.

关键词: nanocluster catalyst, icosahedral Au25, biicosahedral Au25, selective oxidation, selective hydrogenation

Abstract: The catalytic properties of two nanocluster catalysts with atomically precisely known structures, icosahedral two-shelled Au25(SC2H4Ph)18 nanospheres and biicosahedral Au25(PPh3)10(SC2H4Ph)5Cl2 nanorods, were compared. Their catalytic performance in the two reactions of the selective oxidation of styrene and chemoselective hydrogenation of α,β-unsaturated benzalacetone was investigated. The catalytic activities of icosahedral Au25(SC2H4Ph)18 nanospheres were superior to those of the bi-icosahedral Au25(PPh3)10(SC2H4Ph)5Cl2 nanorods for both reactions. The better catalytic performance of the Au25(SC2H4Ph)18 nanospheres can be attributed to their unique core-shell (Au13/Au12) geometric structure that has an open exterior atomic shell and to their electronic structure with an electron-rich Au13 core and an electron-deficient Au12 shell.

Key words: nanocluster catalyst, icosahedral Au25, biicosahedral Au25, selective oxidation, selective hydrogenation