Understanding the role of nickel on the hydrogen storage capacity of Ni/MCM-41 materials

PAOLA M. CARRARO; ANDRÉS GARCÍA BLANCO; FEDERICO SORIA; GERMÁN LENER; KARIM SAPAG; GRISELDA A. EIMER; MARCOS I. OLIVA

MICROPOROUS AND MESOPOROUS MATERIALS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2016 vol. 231 p. 31 - 31

1387-1811

n this study, we prepared MCM-41 mesoporous materials modified with different Ni contents, aspromising materials for hydrogen storage. We focused on the role of dispersed nickel as a way of promotingthe interaction with hydrogen as an alternative to improve hydrogen storage materials. Inaddition, the reducibility of Ni/MCM-41 materials was studied, and the hydrogen adsorption in thereduced materials was evaluated, in order to compare the behaviour of reduced and unreduced Ni/MCM-41 materials in hydrogen storage at 77 and 293 K. Hydrogen adsorption isotherms were measured at 77 Kand 293 K, and at low and high-pressure conditions respectively. The results obtained show that theamount of hydrogen stored was highly enhanced by the dispersion of small amounts of Ni nanoparticlesboth at 77 and 293 K.Experimental techniques such as TPR, XPS, N2 adsorption-desorption and computational methods(DFT) were used in order to interpret the results and contribute to the understanding of hydrogenadsor