Porous microspheres of MgO-patched TiO2 for CO2 photoreduction with H2O vapor: temperature-dependent activity and stability

Abstract

A novel MgO-patched TiO₂ microsphere photocatalyst demonstrated 10 times higher activity toward CO production from CO₂ photoreduction with H₂O vapor, when the reaction temperature increased from 50 to 150 °C. The catalytic performance of hybrid MgO–TiO₂ was much more stable than TiO₂, particularly at a higher temperature, likely due to easier desorption of reaction intermediates and the enhanced CO₂ adsorption by MgO.