The effect of the morphological characteristics of TiO<sub>2sub> supports on the reverse water-gas shift reaction over Pt/TiO<sub>2sub> catalysts
- 作者：Sung Su Kim ; Hyun Hee Lee ; Sung Chang Hong<sup> ; sup><sup>schong@kyonggi.ac.krsup>
- 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 TiO<sub>2sub> support on the reverse water-gas shift reaction over Pt/TiO<sub>2sub> catalysts was examined. The activity of Pt catalysts with 6 different types of TiO<sub>2sub> supports varied during the reverse water-gas shift reaction. Analysis using H<sub>2sub> Temperature Programmed Reduction (TPR) and Temperature Programmed Desorption (TPD) confirmed that the active sites of the Pt/TiO<sub>2sub> catalyst included both the Pt sites and the TiO<sub>2sub> sites, which were reducible, and the difference in the activity of the Pt/TiO<sub>2sub> catalysts was dependent on the reducibility of the TiO<sub>2sub> supports. X-ray diffraction (XRD) analysis showed that the TiO<sub>2sub> crystallite size was a key factor that dictated the reducibility of the TiO<sub>2sub> sites.