INVESTIGADORES
SAPAG Manuel Karim
artículos
Título:
Effect of nickel loading on hydrogen adsorption capacity of different mesoporous supports
Autor/es:
CARRARO, P. M.; SORIA, F. A.; VASCHETTO, E. G.; SAPAG, K.; OLIVA, M. I.; EIMER, G. A.
Revista:
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
Editorial:
SPRINGER
Referencias:
Año: 2019 vol. 25 p. 1409 - 1418
ISSN:
0929-5607
Resumen:
Pure siliceous and aluminosilicate mesoporous molecular sieves of MCM-41 type have been used as support for nickelincorporation (2.5 wt%) by wet impregnation method. The hydrogen adsorption capacities at 77 K of these materials havebeen studied. Various techniques such as X-ray diffraction, N2adsorption?desorption, X-ray photoelectron spectroscopy,Temperature-Programmed Reduction, UV?Vis diffuse reflectance spectroscopy and adsorption of pyridine coupled to infraredspectroscopy were employed to characterize the materials. In addition, Density Functional Theory calculations were used inorder to interpret the results of hydrogen adsorption. The results obtained show that isolated metallic species are capable topromote hydrogen favorable sites. Isolated mononuclear Ni2+species on the surface strengthen the interaction with the H2,enhancing the hydrogen adsorption capacity.
