Enhancing Aqueous Chlorate Reduction Using Vanadium Redox Cycles and pH Control.

ABSTRACT: Chlorate (ClO₃^-) is a toxic oxyanion pollutant from industrial wastes, agricultural applications, drinking water disinfection, and wastewater treatment. Catalytic reduction of ClO₃^- using palladium (Pd) nanoparticle catalysts exhibited sluggish kinetics. This work demonstrates an 18-fold activity enhancement by integrating earth-abundant vanadium (V) into the common Pd/C catalyst. X-ray photoelectron spectroscopy and electrochemical studies indicated that V^V and V^IV precursors are reduced to V^III in the aqueous phase (rather than immobilized on the carbon support) by Pd-activated H₂. The V^III/IV redox cycle is the predominant mechanism for the ClO₃^- reduction. Further re

SUBMITTER: Gao J 

PROVIDER: S-EPMC10702506 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature