2.8NiO-H1.8Ni0.6(OH)MoO4 – novel nanocomposite material for the reactive adsorption of sulfur-containing molecules at moderate temperature

Publication year: 2011
Source: Applied Catalysis B: Environmental, In Press, Accepted Manuscript, Available online 13 June 2011

Jonathan, Skrzypski , Igor, Bezverkhyy , Olga, Safonova , Jean-Pierre, Bellat

It has been found that a poorly crystalline green precipitate that forms in boiling ammonia solution of Ni(NO3)2 and (NH4)6Mo7O24 yields on annealing a Ni-rich material (Ni/Mo=3.4) containing slit shaped mesopores and exhibiting the BET surface area of 230 m2/g. Characterization of the material by TGA, XRD, TEM, SEM, and EXAFS allowed to determine that it is a nanocomposite consisting of Ni-Mo (hydro)oxide layers H1.8Ni0.6(OH)MoO4 which are pillared by NiO nanoparticles (D=3nm). The structure of the layers appears to be similar to that found in the previously described crystalline molybdate (NH4)HNi2(OH)2(MoO4)2 prepared in the similar conditions. The obtained nanocomposite 2.8NiO-H1.8Ni0.6(OH)MoO4…

 Highlights: ► ► ► New layered material is synthesized: 2.8NiO-H1.8Ni0.6(OH)MoO4 ► The material is mesoporous with BET surface area of 230 m2/g ► NiO nanoparticles play the role of pillars between the Ni molybdate layers ► In H2 flow at 300°C the solid is reduced to Ni3.4Mo nanoparticles ► The solid reacts with thiophene at 300°C 10 times faster than Ni/ZnO