To demonstrate the bimetallic effect of transition metal catalyzed C—C cross coupling,the montmorillonite(MMT) supported mixed palladium and copper nanoparticles were prepared and applied to catalytic Sonogashira couplings.A new method of preparing mixed metal nanoparticles was invented based on unique metal ion adsorption capacity of montmorillonite and sequential reductive carbonylation via thermolysis of N,N-dimethylformide,and Pd/Cu bimetallic nanoparticals was prepared in the ratio of 1∶1.A mixed solve...