Effect of nickel over the H2 adsorption on Ni/MCM-41 materials

SORIA, F.A.; OLIVA, M.I.; CARRARO, P.M.; LENER, G.; SAPAG, K.; GARCÍA BLANCO, A.A.; EIMER, G.A.

Madrid

Simposio; 3rd International Symposium on Catalysis for Clean Energy and Sustainable Chemistry; 2016

Instituto de Catálisis y Petroleoquímica ICP-CSIC

Repeated efforts have been made to introduce alternatives to petroleum. One of these alternatives is hydrogen, as it might be a clean and renewable energy vector.Ordered nanostructured materials such as MCM-41 mesoporous molecular sieves have been studied as promising candidates for hydrogen storage. There are severalliterature reports that concern the nickel loading on porous materials, which indicated that the hydrogen adsorption is maximum at a low metal content and it thendecreases with increasing nickel loading on the support . However, further investigations are necessary for a deeper understanding of the mechanism of hydrogenadsorption on nanoporous materials. Therefore, in the present work the hydrogen storage capacity of Ni/MCM-41 materials was studied by means of experimentalresults and Density Functional Theory (DFT) calculations. The Ni/MCM-41 samples were reduced in order to analyze the metallic nickel contribution on the H2adsorption. Also, hydrogen adsorption isotherms at room temperature and high pressures for reduced and un-reduced samples were measured. The physicochemicalproperties of the samples, obtained by means of the characterizations performed (TPR, DRX, N2 adsorption-desorption) were correlated with the informationprovided by the DFT calculations and used to interpret the behavior of the samples in hydrogen storage.