Preparation and Reaction Studies of $Pt/Al_2O_3$ Model Catalysts

  • Kim, Chang-Min (Department of Chemistry Kyungpook National University) ;
  • Gabor A. Somorjai (Department of Chemistry University of California Berkeley)
  • Published : 1994.12.01

Abstract

Surface of Pt/$Al_2O_3$ model catalyst was produced on an aluminum foil with surface area of 1 $cm^2$ The aluminum surface was oxidized under $10 ^5Torr$Torr oxygen and platinum was deposited on top of the oxide layer using a plasma evaporation source. Conversion of I-butene was performed on the model catalyst surface. Isomerization was the major reaction in I-butene conversion on the aluminum oxide layer. Addition of Pt on the aluminum oxide layer induces hydrogenation of I-butene. Selectivity for the hydrogenation increases as the amount of Pt on alumina increases.

알루미늄 박편 위에 Pt/$Al_2O_3$ 모델 촉매를 만들었다. 알루미늄 표면을 $10 ^5Torr$의 산소 압력 하에서 산화시킨후 plasma evaporation source를 사용하여 Pt을 증착시켰다. 이 모델 촉매 표면에서 일 어나는 1-butene 의 반응을 연구하였다. 산화알루미늄 표면에서는 이성질화 반응이 일어 났으나 Pt을 증착시킨 산화알루미늄 표면에서는 수소첨가반응이 일어남이 관찰되었다. 알루미나 표면의 Pt이 증가함 에 따라 수소첨가반응으로서 선택성이 증가되었다.

Keywords