Surface Electroactive Sites of Tungstated Zirconia Catalysts for Vanadium Redox Flow Batteries.

ABSTRACT: Surface electroactive sites for tungstate zirconia (WZ) were created by utilizing tungstate-immobilized UiO-66 as precursors via a double-solvent impregnation method under a mild calcination temperature. The WZ-22-650 catalyst, containing a moderate W content (22%), demonstrated a high density of surface electroactive sites. Proper heat treatment facilitated the binding of oligomeric tungsten clusters to stabilized tetragonal ZrO₂, resulting in improved catalytic performance toward the VO²⁺/VO₂⁺ redox couples compared to other tested samples. The substantial surface area, mesoporous structure, and establishment of new W-O-Zr bonds affirm the firm anchoring of WO_x to ZrO₂. This robust attachment enhances surface electr

SUBMITTER: Demeku AM 

PROVIDER: S-EPMC10875639 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature