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自1978年Tauster等发现第Ⅷ族金属元素负载于TiO_2载体上,经770K氢还原处理后,催化剂的活性组份——金属粒子对H_2和CO的化学吸附受到明显的抑制,因此,无法用化学吸附法测定负载型催化剂中金属粒子分散度和估算粒子大小。他们认为,出现这种现象是因为金属与载体间存在强相互作用(简称SMSI)。几年来,不少研究工作者对这类SMSI效应很关注,先后研究了其催化性能。例如Ni/TiO_2,发现以TiO_2为载体的镍催化剂比载在Al_2O_3和SiO_2载体上的催化剂其性能有显著差异,如在甲烷化反应与费多合成中有较高的
Since 1978, Tauster et al. Found that Group VIII metal elements are supported on the TiO 2 carrier, and after 770K hydrogen reduction, the chemisorption of H 2 and CO on the active component-metal particles of the catalyst is significantly inhibited. Therefore, Determination of Particle Size Distribution and Particle Size in Adsorptive Catalysts by Adsorption. They think this phenomenon is due to the strong interaction between metal and carrier (SMSI for short). In recent years, many researchers have paid close attention to these SMSI effects and studied their catalytic performance. Such as Ni / TiO 2, found that the performance of Ni catalysts supported on TiO 2 is significantly different from those supported on Al 2 O 3 and SiO 2 supports, such as the higher methanation reaction and Fischer-Tropsch synthesis