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用真空TPD和氩流TPD方法研究了Pt/Al_2O_3,Pt/SiO_2和Pt/TiO_2催化剂。结果指出,Pt/TiO_2催化剂在高温氢还原时生成含氢的钛物种,是产生金属-担体强相互作用的原因。
The Pt / Al 2 O 3, Pt / SiO 2 and Pt / TiO 2 catalysts were investigated by vacuum TPD and argon flow TPD methods. The results show that the Pt / TiO 2 catalyst generates hydrogen-containing titanium species at high temperature for hydrogen reduction, which is responsible for the strong metal-cantilever interaction.