Plasmonic Au nanoparticles enhance the photogenerated electron efficiency for carbon dioxide photoreduction

Abstract

This work reported an Au_x/BaTiO₃ plasmonic photocatalyst with superior photocatalytic CO₂ reduction performance under visible light irradiation compared to ordinary BaTiO₃. This is mainly attributed to the introduction of plasmonic Au NPs, which improves the separation efficiency of photogenerated carriers and further enhances the photocatalytic CO₂ reduction performance of the catalyst through the hot electrons generated by the LSPR effect. The photocatalytic conversion rates of CO₂ to CO and CH₄ by Au₅/BaTiO₃ reached 62.3 and 20.7 μmol g⁻¹ h⁻¹, respectively.