Pt Based Catalysts Prepared By Hydrothermal Synthesis Method In On Water-gas Shift Reaction

Water gas shift (WGS) reaction is one of the important steps in hydrogen production forfuel cells. Traditional industrial process for water gas shift (WGS) reaction is complex andneeds two steps includes a high-temperature shift and a low-temperature shift normaly. This isnot an appropriate choice for mobile applications. A single-stage WGS conversion is thusdesirable. Supported noble metal-based (e.g., Pt) catalysts are reported as promisingsingle-stage WGS catalysts at present.So far, noble metal catalysts supported on a varity of oxide carrier (e.g., TiO2, ZrO2) havebeen studied in the literatures, and they find the catalytic reactivity of the oxide supports notonly depends on the particle size, but also closely realates to the morphology.In this paper, three kinds of CeO2carrier with the microstructure of nanorods, nano cubeand nano polyhedron were prepared by hydrothermal synthesis method. The nanostructureand redox characteristic of CeO2were also analyzed.For the first time, the active components were directly embedded on supports through anin situ synthesis technique. Pt/CeO2catalyst with low loading amount were prepared byhydrothermal synthesis method, which have different microstructure, i.e. nanorods, nano cubeand nano polyhedron. The catalysts were characterized by XRD、FTIR、BET、TEM、ICP andthe effect of morphology on their WGS catalytic activity was investigated in a simulatedWGS feed. The Pt/CeO2nano polyhedron catalyst showed the highest WGS activity, and themethanation reaction was also effectively inhibited.