absorbate

The results are showed as follows.Lewis(Louis) acid sites exist on the surface of α-Alumina support and silver catalyst.Pyridine, the basic absorbate, can be adsorbed on its Lewis (Louis)acid sites.

表明： 在载体α-氧铝和银催表面都存在L酸中心，碱性附质吡啶能附于其L酸位， 载体α-氧铝负载银之后，其酸性中心浓度有所降低，在银催加入一定量的助催铯后，其酸性中心浓度又有了明显下降。