Influence of Countercations on the NH₃-SCR of NO Using Supported Vanadium-Containing Polyoxometalate Catalysts.

ABSTRACT: Anatase-supported vanadium-substituted Keggin-type polyoxometalates (POMs) are promising alternative catalysts for the selective catalytic reduction (SCR) of NO_x with NH₃ at low temperatures. Generally, alkali poisoning is a major deactivation mechanism in vanadium-catalyzed SCR, but changing the counter cations in the POM catalyst might be a propitious strategy for enhancing the catalyst stability. In this study, the effect and the role of cation variation were investigated in detail by exchanging the protons from the most promising Keggin-type HPA-3 (H₆PV₃Mo₉O₄₀) catalyst dispersed on anatase support with cations such as Na⁺, K⁺, Cs⁺. The synthesized catalysts were characterized in-depth us

SUBMITTER: Shaikh S 

PROVIDER: S-EPMC12679341 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature