Controlled Preparation of Nano-Au/NaZSM-5 Catalyst and Its Catalytic Performance

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作者单位: Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China Organization-Enhanced Name(s) Chinese Academy of Sciences Taishan Med Univ, Dept Chem & Chem Engn, Tai An 271016, Shandong, Peoples R China Organization-Enhanced Name(s) Taishan Medical University

摘要: Series of highly dispersed size-controlled nano-Au/NaZSM-5 catalysts were prepared by nitromethane reduction-colloid gold immobilization method. Taking heterogeneous CO oxidation as a model reaction, the influences of Au particle size, pH value, reaction temperature, reaction time, activation temperature and Au loading amount on the activities of the catalysts were investigated. These catalysts were characterized by means of transmission electron microscopy(TEM), powder X-ray diffraction (XRD), ...更多; Series of highly dispersed size-controlled nano-Au/NaZSM-5 catalysts were prepared by nitromethane reduction-colloid gold immobilization method. Taking heterogeneous CO oxidation as a model reaction, the influences of Au particle size, pH value, reaction temperature, reaction time, activation temperature and Au loading amount on the activities of the catalysts were investigated. These catalysts were characterized by means of transmission electron microscopy(TEM), powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy(XPS) and H(2) temperature programmed reduction(H(2)-TPR) to verify the surface chemical states and the structures of the catalysts. The results show that both the preparation procedure and the reaction conditions have great influences on the sizes of gold particles and the activities of Au/NaZSM-5 catalysts. The performances of the catalysts are obviously dependent on the sizes of gold nanoparticles.收起

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