Synthesis and multi-technique characterization of nickel loaded MCM-41 as potential hydrogen storage materials

PAOLA CARRARO; ELÍAS VERÓNICA R; ANDRÉS GARCÍA BLANCO; KARIM SAPAG; S. MORENO; MARCOS I. OLIVA; EIMER GRISELDA A.

MICROPOROUS AND MESOPOROUS MATERIALS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2014 vol. 191 p. 103 - 111

1387-1811

Ni/MCM-41 samples have been successfully prepared by wet impregnation method with different degrees of metal loading. Various techniques including X-ray diffraction, N2 adsorption-desorption, transmission electron microscopy, inductively coupled plasma atomic emission spectroscopy, electron microprobe analysis, UV-Vis diffuse reflectance spectra, infrared analysis, adsorption of pyridine coupled to infrared spectroscopy and hydrogen adsorption at 77 K at high and low pressure conditions were employed for the materials characterization. The Ni loading degree had a marked influence on the structural, chemical, acid and hydrogen storage properties of the samples. Thus, a low Ni loading favors the presence of highly dispersed Ni speciesresponsible of the Lewis acidity. These species would promote hydrogen-favorable sites leading to a positive effect on the hydrogen storage capacity.