Atomically Dispersed Ru/Feox Catalyst with High Performance for Water Gas Shift Reaction

Abstract

In the water gas shift (WGS) reaction, single-atom catalysts can optimize atomic configurations, enhance catalytic activity, and suppress methanation reactions. In this study, 0.05Ru/FeOx Ru single-atom catalysts (SACs) and 1.31RuNP/FeOx nanoparticle catalysts (NPCs) were prepared on iron oxide surfaces by co-precipitation. Ru SACs was confirmed by AC-HAADF-STEM and DRIFTS techniques. The Ru SACs exhibited weak CO adsorption, inhibiting methanation, while oxygen vacancies promoted H2O dissociation, enhancing activity. Compared to Ru NPCs，Ru SACs the catalyst achieved 6.4 times higher activity, and this work provides an essential theoretical basis for the design and optimization of highly efficient WGS catalysts.

Keywords: Ru/FeOx catalyst, Ru single-atom, nanoparticles, water gas shift reaction