Hydrodechlorination of CCl4 on Pt-Au/Al2O3 Catalysts

作者：Legawiec Jarzyna Marta; Juszczyk Wojciech; Bonarowska Magdalena; Kaszkur Zbigniew; Kepinski Leszek; Kowalczyk Zbigniew; Karpinski Zbigniew^*

来源：Topics in Catalysis, 2009, 52(8): 1037-1043.

DOI：10.1007/s11244-009-9258-5

• CCl4
• Hydrodechlorination
• Pt-Au/Al2O3
• Surface chloriding
• Effect of alloying

A series of Pt/Al2O3 catalysts were prepared by the impregnation method and were characterized by TEM, XRD, H-2 and CO chemisorptions, and investigated in the hydrodechlorination of tetrachloromethane. Three Pt-rich, Pt-Au/Al2O3 catalysts (Pt-100, Pt95Au5 and Pt90Au10) showed a similar metal particle size (similar to 2.5-2.7 nm), so observed changes in the catalytic behavior are ascribed to alloying effect, especially because a considerable degree of Pt-Au mixing was achieved in the bimetallic samples. It appeared that by introducing very small amount of gold (10 at.%) to platinum, the catalytic activity is increased. It is argued that the occurrence of this moderate synergistic effect is associated with a decreased tendency of surface chloriding when platinum is alloyed with gold.

• 出版日期2009-7