Double-cocatalysts promote charge separation efficiency in CO2 photoreduction: spatial location matters

Abstract

The double-cocatalyst spatially separated structure was built by introducing Pt (electron trapper) and CoO_x (hole collector) nanoparticles, growing on the outer and inner surface of the skeleton of hierarchically ordered TiO₂–SiO₂ respectively. This novel designation showed an enhanced performance in the photoreduction of CO₂ and H₂O vapor for the selective generation of CH₄ (up to 94.7%).