CO2 methanation property of Ru nanoparticle-loaded TiO2 prepared by a polygonal barrel-sputtering method

Abstract

Highly dispersed Ru nanoparticles loaded on a TiO₂ support (Ru/TiO₂(B)), which affects the hydrogenation of CO₂ to CH₄ (methanation), were prepared by employing a “dry” modification method using a barrel-sputtering instrument. The loaded Ru nanoparticles exhibited a narrow particle-size distribution with a mean diameter of ca. 2.5 nm. Methanation of CO₂ on the Ru/TiO₂(B) catalyst produced a 100% yield at ca. 160 °C, which is more than 200 °C below that required for Ru/TiO₂ prepared by a conventional “wet” impregnation method. In addition, the methanation reaction over Ru/TiO₂(B) proceeded at temperatures as low as room temperature with a reaction rate of 0.04 µmol min⁻¹ g⁻¹.