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采用沉积-沉淀法制备了一种介孔氧化铝负载的金催化剂用于CO的低温催化氧化,详细考察了催化剂制备条件、干燥条件和热处理条件对其催化性能的影响。采用X射线粉末衍射(XRD)、透射电镜(TEM)、低温N2物理吸附(N2-BET)、电感耦合等离子发射光谱(ICP-AES)和紫外-可见漫反射(Uv-vis DRS)对催化剂进行了表征。结果表明,通过严格控制催化剂的制备条件、干燥条件和热处理条件,可以在惰性氧化铝载体上高重复性可控合成具有高分散度的金催化剂,金颗粒最佳平均粒径为2 nm,体现出良好的CO低温催化氧化性能。
A mesoporous alumina supported gold catalyst was prepared by the deposition-precipitation method for the low-temperature catalytic oxidation of CO. The effects of catalyst preparation conditions, drying conditions and heat treatment conditions on the catalytic performance were investigated in detail. The catalysts were characterized by XRD, TEM, N2-BET, ICP-AES and Uv-vis DRS Characterization. The results show that the gold catalyst with high dispersibility can be synthesized with high repeatability and high reproducibility on inert alumina supports by strictly controlling the preparation conditions, drying conditions and heat treatment conditions. The optimum average particle size of gold particles is 2 nm, A good CO low temperature catalytic oxidation performance.