论文部分内容阅读
用氢等压吸附及程序升温脱附表征了高分散的铂锡催化剂,表明用络合法制备的铂锡催化剂的表面存在强吸附中心,在较高温度下能吸附较大量的氢;而常规浸渍法制备的铂锡催化剂其表面氢吸附性质类似于铂催化剂,在热脱附时为一连续的脱附谱。此结果可以说明络合法制备的铂锡催化剂中锡与铂相互作用较强。
Hydrogen isobaric adsorption and programmed temperature-programmed desorption were used to characterize the highly dispersed platinum-tin catalysts. The results showed that there was a strong adsorption center on the surface of the platinum-tin catalyst prepared by the complexation method and a larger amount of hydrogen could be adsorbed at higher temperatures. The platinum-tin catalyst prepared by the impregnation method has a surface hydrogen adsorption property similar to that of the platinum catalyst, and is a continuous desorption spectrum upon thermal desorption. This result shows that the interaction between tin and platinum is stronger in the platinum-tin catalysts prepared by complex method.