Tuning the Phase Structure of ZnTiO3 Support to Promote the Catalytic Activity of Pd/ZnTiO3 Catalyst for the CO Oxidative Coupling to Dimethyl Oxalate

Abstract

AbstractZinc titanate (ZnTiO3) has recently been applied in various areas for its unique properties. Herein, through tuning the phase structures of ZnTiO3 support, we synthesized two different Pd‐based catalysts for CO oxidative coupling to DMO and further investigated their structure‐activity relationships for the first time. The results indicated that the strong metal‐support interaction between the cubic phase ZnTiO3 and Pd species leads to an enriched Pd electronic density and promotes the bridged CO adsorption. As a result, the as‐synthesized catalyst with cubic phase ZnTiO3 performed a turnover frequency (TOF) of 339.3 min−1, which was much higher than the hexagonal one (226.3 min−1).