Preparation , characterization , and catalytic properties of MeAPO-5 ﹙Me：V, Fe, Ni , Cu﹚

• Main Authors: Gwei-Luen Hsu, 許桂綸
• Other Authors: Shu-Hua Chien
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/60836261348436465571

碩士 === 國立中央大學 === 化學研究所 === 90 === Aluminophophates with AFI structure have been prepared by hydrothermal synthesis, characterized by several physicochemical techniques﹙i.e., XRD、Solid State MAS NMR、UV-Vis、EPR、TPR、BET、ICP-MAS and SEM﹚and tested for the NO/CO reactions. The influence of the different synthesis parameters, particulary the content and the pH of the gel and the presence of complexing agents, has been studied. The metal atoms are incorporated as isolated metal ions in square pyramidal or distorted octahedal environments. After calcinations in air, most of the V4+ ions are oxidized to V5+ in square pyramidal or octahedral symmetry, which envolve toward tetrahedral coordination upon dehydration. The MeAPO-5 supported copper catalysts are active and selective for the NO/CO reactions. Their catalytic properties are better than the MeAPO.