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美国伊利诺斯大学研制成功一种超声波洗净浴,可用于除去镍粉表面的氧化膜,使该催化剂活化。由于镍接触空气后形成牢固的保护膜,从而使其催化活性劣优。该校苏斯列克教授和卡萨顿特教授共同研究的结果发现:镍如果暴露在20千赫兹声波中,其催化活性增加十万倍以上。用烯烃的加氢反应做实验(溶剂用辛烷),超声波照射前的镍粒子表面是凹凸状的结晶,经照射后就成为光滑球状,进而集结成块状。同时,镍表面最初厚
University of Illinois successfully developed an ultrasonic cleaning bath can be used to remove the oxide film on the surface of nickel powder, the catalyst activation. Because nickel forms a strong protective film upon contact with air, its catalytic activity is poor. The results of a joint study between Professor Susilkirk and Professor Kartonte found that the catalytic activity of nickel increased by more than 100,000 times if exposed to 20 kHz sound waves. Experiments were carried out by hydrogenation of olefins (octane for solvent). The surface of the nickel particles before the ultrasonic irradiation was a concavo-convex crystal, which became smooth and spherical after being irradiated, and was further aggregated into lumps. At the same time, the nickel surface is initially thick