CuO/TiO2的制备及对NO＋CO反应性能的研究

The catalytic activities of CuO supported on three kinds of TiO2 were investigated with a microreactor-GC NO+CO reaction system. The results showed that the catalytic activity of CuO/TiO2 catalysts for NO+CO reaction decrease in the order: Cu6-Ti(T)> Cu6-Ti(S)>Cu6-Ti(nm), and the specific surface and the crystallite transformation didn't show negative influence on catalytic activities. TPR profiles indicated that Cu6-Ti had three or four TPR peaks, indicating the existence of several kinds of Cu species. By comparing the results of TPR and catalytic activities, it could be concluded that besides highly dispersed CuO, the CuO crystallite also plays an important role in NO+CO reaction. The results of H2-TPR of pre-treated Cu6-Ti showed that in the processing of reaction, Cu species exists in several valency. Using NO-TPD, we presumed that the catalytic activity has a close relationship with NO dissociation, but not with the amount of adsorbed NO.