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http://repositoriodigital.ipn.mx/handle/123456789/10951| Título : | Structure of Porous Copper Prussian Blue Analogues: Nature of Their High H2 Storage Capacity |
| Fecha de publicación : | 16-ene-2013 |
| Editorial : | J. Phys. Chem |
| Descripción : | Within porous Prussian blue to copper the highest H2 storage capacity is observed. Such behavior finds explanation in the crystal structure for Cu3[M(CN)6]2 with M ) Fe, Co, Ir. The crystal structure of Prussian blue analogues is usually solved and refined with a cubic unit cell in the Fm3 jm space group, which corresponds to a random vacancy distribution. However, a careful evaluation of X-ray diffraction powder patterns of copper-containing compositions reveals a deviation from that structural model. The crystal structure for the considered series of copper hexacyanometallates(III) was found to be also cubic but in the Pm3 jm space group related to a nonrandom vacancy distribution. To this model 50% of vacancies for the building block, [M(CN)6], corresponds, which is quite different from the value of 33.3% in the Fm3 j m structural model. Mo¨ssbauer spectra and high pressure H2 adsorption isotherms support the assignment of the Pm3 jm space group for the studied series of copper Prussian blue analogues. The implications of a nonrandom vacancy distribution on the physical properties of these materials are discussed. |
| URI : | http://www.repositoriodigital.ipn.mx/handle/123456789/10951 |
| Otros identificadores : | J. Phys. Chem. C 2010, 114, 5043–5048 http://hdl.handle.net/123456789/469 |
| Aparece en las colecciones: | Doctorado |
Ficheros en este ítem:
| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| 2010CuPB&H2 1.pdf | 38.92 kB | Adobe PDF | Visualizar/Abrir |
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