One-pot or two-pot synthesis? Using a more facile and efficient method to synthesize Ni-phyllosilicate catalyst derived from 3D-SBA-15

Abstract

In order to compare the effect of preparation method on the catalytic performance over Ni/3D-SBA-15 catalyst for CO2 methanation, one-pot and two-pot synthesis strategies were used in this work. 3D-SBA-15-derived Ni-phyllosilicate catalyst could be obtained via a two-pot hydrothermal synthesis using 3D-SBA-15 and nickel nitrate as precursors at 180 °C. This Ni-phyllosilicate catalyst with a monolithic macromorphology and a microcosmic appearance of 3D-networked framework covered by nanosheets, was also achieved via a one-pot hydrothermal method with elimination of the preparation and pretreatment of 3D-SBA-15. The one-pot-synthesized Ni/S–O catalyst not only showed high catalytic activity due to the small-sized Ni particles, but also exhibited excellent anti-sintering property owing to the strong metal-support interaction derived from Ni-phyllosilicate. Compared with the two-pot synthesis, many advantages were observed for one-pot synthesis including monolithic appearance, high convenience, large Ni-phyllosilicate amount and low cost.