Switchable Tuning CO₂ Hydrogenation Selectivity by Encapsulation of the Rh Nanoparticles While Exposing Single Atoms

Abstract

The switch of CO₂ hydrogenation selectivity from CH₄ to CO over TiO₂ supported Rh catalysts is accomplished via selective encapsulation of Rh nanoparticles while exposing Rh single atoms by high-temperature reduction (HTR) according to their different strong metal-support interaction (SMSI) occurrence conditions, which can be reversed by subsequent oxidation treatment.