The effect of the morphological characteristics of TiO₂ supports on the reverse water-gas shift reaction over Pt/TiO₂ catalysts

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• 作者：Sung Su Kim ; Hyun Hee Lee ; Sung Chang Hong ; ^{schong@kyonggi.ac.kr}
• 关键词：Pt ; TiO2 ; CO2 ; RWGS ; SMSI
• 刊名：Applied Catalysis B ; Environmental
• 出版年：2012
• 期刊代码：4_09263373
• 类别：ce
• 出版时间：30 May, 2012
• 卷：119-120
• 期：Complete
• 页码：100-108
• 文件大小：1128 K

摘要

The effect of the morphological characteristics of a TiO₂ support on the reverse water-gas shift reaction over Pt/TiO₂ catalysts was examined. The activity of Pt catalysts with 6 different types of TiO₂ supports varied during the reverse water-gas shift reaction. Analysis using H₂ Temperature Programmed Reduction (TPR) and Temperature Programmed Desorption (TPD) confirmed that the active sites of the Pt/TiO₂ catalyst included both the Pt sites and the TiO₂ sites, which were reducible, and the difference in the activity of the Pt/TiO₂ catalysts was dependent on the reducibility of the TiO₂ supports. X-ray diffraction (XRD) analysis showed that the TiO₂ crystallite size was a key factor that dictated the reducibility of the TiO₂ sites.