LED-driven controlled deposition of Ni onto TiO₂ for visible-light expanded conversion of carbon dioxide into C₁-C₂ alkanes.

ABSTRACT: Photocatalytic gas-phase hydrogenation of CO₂ into alkanes was achieved over TiO₂-supported Ni nanoparticles under LED irradiation at 365 nm, 460 nm and white light. The photocatalysts were prepared using photo-assisted deposition of Ni salts under LED irradiation at 365 nm onto TiO₂ P25 nanoparticles in methanol as a hole scavenger. This procedure yielded 2 nm Ni particles decorating the surface of TiO₂ with a nickel mass content of about 2%. Before the photocatalytic runs, Ni/TiO₂ was submitted to thermal reduction at 400 °C in a 10% H₂ atmosphere which induced O-defective TiO_2-x substrates. The formation of oxygen vacancies, Ti³⁺ centers and metallic Ni sites upon photocatalytic CO₂

SUBMITTER: Sanz-Marco A 

PROVIDER: S-EPMC9417592 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature