Stabilization of the Active Ruthenium Oxycarbonate Phase for Low-Temperature CO₂ Methanation.

ABSTRACT: Interstitial carbon-doped RuO₂ catalyst with the newly reported ruthenium oxycarbonate phase is a key component for low-temperature CO₂ methanation. However, a crucial factor is the stability of interstitial carbon atoms, which can cause catalyst deactivation when removed during the reaction. In this work, the stabilization mechanism of the ruthenium oxycarbonate active phase under reaction conditions is studied by combining advanced operando spectroscopic tools with catalytic studies. Three sequential processes: carbon diffusion, metal oxide reduction, and decomposition of the oxycarbonate phase and their influence by the reaction conditions, are discussed. We present how the reaction variables and catalyst composition can promote carbon diffusion, stabilizing the ox

SUBMITTER: Tebar-Soler C 

PROVIDER: S-EPMC10949189 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature