The synergetic effect of PdCr based bimetallic catalysts supported on RGO-TiO2 for organic transformations

Abstract

In this study, a series of PdCr bimetallic catalysts with different weight percentage (10, 20, 30 and 40 wt%) of RGO decorated with TiO2 were prepared successfully. It was found that PdCr@RGO(30)-TiO2 nanocatalyst performed exceptionally well for the Suzuki coupling and hydrogenation of nitroarenes and α,β-unsaturated carbonyl compounds as compared to other synthesized catalysts. Introducing Cr3+ into the catalyst not only decreased the cost but also enhanced the catalytic activity due to the remarkable synergistic effect between Pd and Cr NPs. These significant synergistic interactions between Pd and Cr account for the observed high catalytic efficacy of the nanocatalyst, which afforded excellent yield in short reaction time and also retain catalytic activity for several runs.

Keywords

• Reduced graphene oxide
• Bimetallic catalysts
• X-ray photoelectron spectroscopy
• Synergistic interactions