Facile preparation and unique H2 adsorption behavior of three-dimensional novel Pt–Ru hollow sphere assemblies
| Autor: | Dong-Pyo Kim, Xiaodong Li, Yan-wu Li, Hao Wang, Sung June Cho |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Nanoparticle chemistry.chemical_element Nanotechnology General Chemistry Condensed Matter Physics Borohydride Metal chemistry.chemical_compound Adsorption Chemical engineering chemistry Mechanics of Materials Phase (matter) visual_art visual_art.visual_art_medium General Materials Science Carbon Stoichiometry BET theory |
| Zdroj: | Microporous and Mesoporous Materials. 117:208-212 |
| ISSN: | 1387-1811 |
| DOI: | 10.1016/j.micromeso.2008.06.037 |
| Popis: | Three-dimensional long range ordered hollow Pt–Ru sphere assemblies were prepared using a sacrificial three-dimensionally ordered macroporous (3DOM) carbon template. Metallic salts, such as a mixture of RuCl 3 with H 2 PtCl 6 were infiltrated into the carbon template, and a reduced Pt–Ru phase was produced on the surface of the 3DOM carbon template by a borohydride reduction reaction. The sacrificial template was then burnt off in air at 650 °C. The diameter of the hollow Pt–Ru spheres could be tailored using a different pore size 3DOM carbon template. Assemblies with an outer diameter of 550 nm showed high BET surface area of 584.3 m 2 /g. In addition, a high hydrogen adsorption stoichiometry (>0.5 H/M) was obtained on the Pt–Ru sphere assemblies, which indicated that most of the metal atoms on the surface were exposed. |
| Databáze: | OpenAIRE |
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