CO Oxidation Activity of Au on Spinel Titanate Supports: Improvement of Catalytic Activity via Alkali Cation Substitution from Li4Ti5O12 to Na3LiTi5O12

In this study, density functional theory calculations determined that the formation of O vacancies in spinel-type titanium oxide is affected by the alkali metal cation occupying the 8a-site. This result indicates that substitution of the 8a-site cation, such as Li+-> Na+, should improve catalytic oxidation activity. Experimental results confirmed that Au supported on sodium titanate (Na3LiTi5O12) showed improved catalytic CO oxidation activity compared to Au supported on lithium titanate (Li4Ti5O12).

Automated summary

This study investigated the impact of alkali metal cation occupancy on the formation of O vacancies in spinel-type titanium oxide. The results suggested that substituting the cation at the 8a-site could enhance catalytic oxidation activity.