Time-resolved observation of V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> in NH<sub>3</sub>-SCR reveals the equivalence of Brønsted and Lewis acid sites
Inhak Song, Hwangho Lee, Se Won Jeon, Taejin Kim, Do Heui Kim
Abstract
-SCR) is under debate. Here, a Li doping strategy is applied to selectively block Brønsted sites, which aims to prepare model catalysts with the same V loading but different ratios of the two acid sites. Time-resolved in situ DRIFTS observation demonstrates that the surface ammonia species pre-adsorbed on Lewis and Brønsted sites can participate equally in the reaction. Consideration of site redistribution in the early stages of the transient reaction is key to accurate measurement of the ammonia consumption rate.
Topics & Concepts
Lewis acids and basesBrønsted–Lowry acid–base theoryChemistryAnalytical Chemistry (journal)Materials scienceCrystallographyCatalysisOrganic chemistryCatalysis and Oxidation ReactionsCatalytic Processes in Materials ScienceAdvanced Chemical Physics Studies