Inverse iron oxide/metal catalysts from galvanic replacement.

ABSTRACT: Key chemical transformations require metal and redox sites in proximity at interfaces; however, in traditional oxide-supported materials, this requirement is met only at the perimeters of metal nanoparticles. We report that galvanic replacement can produce inverse FeO_x/metal nanostructures in which the concentration of oxide species adjoining metal domains is maximal. The synthesis involves reductive deposition of rhodium or platinum and oxidation of Fe²⁺ from magnetite (Fe₃O₄). We discovered a parallel dissolution and adsorption of Fe²⁺ onto the metal, yielding inverse FeO_x-coated metal nanoparticles. This nanostructure exhibits the intrinsic activity in selective CO₂ reduction that simple metal nanoparticles hav

SUBMITTER: Zhu Y 

PROVIDER: S-EPMC7324589 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature