info:eu-repo/semantics/article
Effect of nickel loading on hydrogen adsorption capacity of different mesoporous supports
Fecha
2019-10-03Registro en:
Carraro, Paola María; Soria, Federico Ariel; Vaschetto, Eliana Gabriela; Sapag, Manuel Karim; Oliva, Marcos Iván; et al.; Effect of nickel loading on hydrogen adsorption capacity of different mesoporous supports; Springer; Adsorption; 25; 7; 3-10-2019; 1409-1418
0929-5607
CONICET Digital
CONICET
Autor
Carraro, Paola María
Soria, Federico Ariel
Vaschetto, Eliana Gabriela
Sapag, Manuel Karim
Oliva, Marcos Iván
Eimer, Griselda Alejandra
Resumen
Pure siliceous and aluminosilicate mesoporous molecular sieves of MCM-41 type have been used as support for nickel incorporation (2.5 wt%) by wet impregnation method. The hydrogen adsorption capacities at 77 K of these materials have been studied. Various techniques such as X-ray diffraction, N2 adsorption–desorption, X-ray photoelectron spectroscopy, Temperature-Programmed Reduction, UV–Vis diffuse reflectance spectroscopy and adsorption of pyridine coupled to infrared spectroscopy were employed to characterize the materials. In addition, Density Functional Theory calculations were used in order to interpret the results of hydrogen adsorption. The results obtained show that isolated metallic species are capable to promote hydrogen favorable sites. Isolated mononuclear Ni2+ species on the surface strengthen the interaction with the H2, enhancing the hydrogen adsorption capacity.