Unraveling the Effects of Reducing and Oxidizing Pretreatments and Humidity on the Surface Chemistry of the Ru/CeO₂ Catalyst during Propane Oxidation.

ABSTRACT: This work investigates the surface chemistry of the Ru/CeO₂ catalyst under varying pretreatment conditions and during the oxidation of propane, focusing on both dry and humid environments. Our results show that the Ru/CeO₂ catalyst calcined in O₂ at 500 °C initiates propane oxidation at 200 °C, achieves high conversion rates above 400 °C, and demonstrates almost no change in activity in the presence of water vapor across the entire studied temperature range of 200-500 °C. Prereduction of the oxidized Ru/CeO₂ catalyst in H₂ significantly enhances its activity, though this enhancement diminishes at higher temperatures. Adding water to the reaction mixture boosts the low-temperature activity of the prereduced catalyst but decreases it at

SUBMITTER: Dinhova TN 

PROVIDER: S-EPMC11770751 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature