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Hollow and cage-bell structured nanomaterials of noble metals

Liu, Hui ; Qu, Jianglan ; Chen, Yunfa ; Li, Jianqiang ; Ye, Feng ; Lee, Jim Yang ; Yang, Jun

Journal of the American Chemical Society, 18 July 2012, Vol.134(28), pp.11602-10 [Tạp chí có phản biện]

E-ISSN: 1520-5126 ; PMID: 22694734 Version:1 ; DOI: 10.1021/ja302518n

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  • Nhan đề:
    Hollow and cage-bell structured nanomaterials of noble metals
  • Tác giả: Liu, Hui ; Qu, Jianglan ; Chen, Yunfa ; Li, Jianqiang ; Ye, Feng ; Lee, Jim Yang ; Yang, Jun
  • Chủ đề: Catalysis -- Analysis ; Diffusion (Physics) -- Analysis ; Methanol -- Chemical Properties ; Silver -- Structure ; Silver -- Chemical Properties
  • Là 1 phần của: Journal of the American Chemical Society, 18 July 2012, Vol.134(28), pp.11602-10
  • Mô tả: Mastery of the structure of nanomaterials enables control of their properties to enhance their performance for a given application. Herein we demonstrate the synthesis of metal nanomaterials with hollow interiors or cage-bell structures based on the inside-out diffusion of Ag in core-shell structured nanoparticles. It begins with the synthesis of core-shell Ag-M or core-shell-shell M(A)-Ag-M(B) nanoparticles in an organic solvent. Ag is then extracted from the core or the inner shell by bis(p-sulfonatophenyl)phenylphosphane, which binds strongly with Ag(I)/Ag(0) to allow the complete removal of Ag in 24-48 h, leaving behind an organosol of hollow or cage-bell structured metal nanomaterials. Because of their relatively lower densities, which usually translate to a higher surface area than their solid counterparts, the hollow and cage-bell structured metal nanomaterials are especially relevant to catalysis. For example, cage-bell structured Pt-Ru nanoparticles were found to display outstanding methanol tolerance for the cathode reaction of direct methanol fuel cells (DMFCs) as a result of the differential diffusion of methanol and oxygen in the cage-bell structure.
  • Ngôn ngữ: English
  • Số nhận dạng: E-ISSN: 1520-5126 ; PMID: 22694734 Version:1 ; DOI: 10.1021/ja302518n

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