P. Araya et al., ACTIVITY DURING REDUCTION OF NO BY CO OVER BIMETALLIC PALLADIUM RHODIUM SILICA CATALYSTS/, Catalysis letters, 35(1-2), 1995, pp. 175-181
A study of the activity of bimetallic Pd-Rh catalysts supported on sil
ica in the reduction of NO by CO is presented. The catalysts were prep
ared by three different methods: (1) Pd and Rh were coimpregnated on t
he support, (2) Rh was impregnated first and, after calcining, the sam
ple was impregnated with Pd, (3) the monometallic Pd and Rh catalysts
were physically mixed. The results showed that the activity of the cat
alysts prepared by coimpregnation was much lower than that of the othe
r two catalysts.