Gallium: A Universal Promoter Switching CO₂ Methanation Catalysts to Produce Methanol.

ABSTRACT: Hydrogenation of CO₂ to methanol is foreseen as a key step to close the carbon cycle. In this study, we show that introducing Ga into silica-supported nanoparticles based on group 8-9 transition noble metals (M = Ru, Os, Rh, and Ir - MGa@SiO₂) switches their reactivity from producing mostly methane (sel. > 97%) to producing methanol (>50% CH₃OH/DME sel.) alongside CO as the only byproduct. These silica-supported catalysts, prepared via a surface organometallic chemistry (SOMC) approach, consist of small, alloyed, and narrowly distributed MGa nanoparticles, as evidenced by X-ray absorption spectroscopy (XAS) and CO adsorption studies. Notably, detailed in situ XAS and diffuse reflectance Fourier transform infrared spectroscopy (DR

SUBMITTER: Zhou W 

PROVIDER: S-EPMC11775694 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature