氧化物担载铑原子簇催化剂的金属载体相互作用的考察 Ⅲ.Rh/La_2O_3和Rh/ZnO催化剂的金属载体相互作用

STUDIES ON THE METAL—SUPPORT INTERACTION FOR SUPPORTED RHODIUM CLUSTER CATALYSIS ON OXIDES Ⅲ The Metal—Support Interaction for Rh/La_2O_3 and Rh/ZnO catalysts

本文是文献[1]、[2]的续篇,选择了Rh/La_2O_3和Rh/ZnO两种SMSI体系,以进一步考察文献[1]、[2]所述观点。

The metal—support interaction for Rh/La_2O_3 and Rh/ZnO catalysts was investigated using the methods in reference [1]. The H_2 sorptive property which is strongly suppressed afeter the reduction at high temperature for Rh/ZnO and Rh/La_2O_3 catalysts can and can not be restored by means of O_2 treatment, and exhibits reversibility and irreversibility, respectively. The supported Rhcan promote the reduction of La_2O_3 and ZnO supports in H_2. The non—strong metal—support interaction (NSMSI)also can happen for both of Rh/ La_2O_3 and Rh/ZnO SMSI systems. The character of NSMSI effect is form Rh—O bond due to the interaction between the supported Rh and the negative ion of the support oxide.