Evidence for the Activation of Lattice Oxygen on Metal Oxides by Plasma Discharge

摘要

Possibility of activation of lattice oxygen on solid catalysts under plasma discharge was investigated in the decomposition of CClF{sub}3 using a surface-discharge type plasma reactor at atmospheric pressure. It was found that the conversion of CClF{sub}3 increased when the plasma reactor was packed with TiO{sub}2 pellets. Analysis of gas phase molecules indicated that molecular oxygen of relatively high level was liberated from TiO{sub}2 during plasma discharge. The lattice oxygen on metal oxides seems to enhance the process by preventing the recombination of decomposed fragments. It was suggested that TiO{sub}2 could be activated not only by photo-energy and thermal energy but also by plasma-energy.