Energy-efficient CO₂ hydrogenation with fast response using photoexcitation of CO₂ adsorbed on metal catalysts.

ABSTRACT: Many heterogeneous catalytic reactions occur at high temperatures, which may cause large energy costs, poor safety, and thermal degradation of catalysts. Here, we propose a light-assisted surface reaction, which catalyze the surface reaction using both light and heat as an energy source. Conventional metal catalysts such as ruthenium, rhodium, platinum, nickel, and copper were tested for CO₂ hydrogenation, and ruthenium showed the most distinct change upon light irradiation. CO₂ was strongly adsorbed onto ruthenium surface, forming hybrid orbitals. The band gap energy was reduced significantly upon hybridization, enhancing CO₂ dissociation. The light-assisted CO₂ hydrogenation used only 37% of the total energy with which the CO₂ hydrog

SUBMITTER: Kim C 

PROVIDER: S-EPMC6072744 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature