Nitrate-to-Ammonia Electroconversion at Neutral pH on Polycrystalline Vanadium Sulfide Derived from Vanadium Disulfide.

ABSTRACT: The electrochemical nitrate reduction reaction (NO₃RR) offers a pathway to produce NH₃ for fuel and fertilizer from waste NO₃ ^-. In this work, a polycrystalline vanadium sulfide (VS _x ), which is derived from solvothermally grown and annealed VS₂, is shown to exhibit excellent NO₃RR activity (2.3 ± 0.6 mg·cm^-2 geo.·h^-1 @ -0.92 V_RHE) and Faradaic efficiency to NH₄ ⁺ (69 ± 6% at -0.69 V_RHE) in buffered neutral pH electrolyte containing 0.1 M NO₃ ^-. A variety of characterization techniques are leveraged to support the VS _x assignment, including X-ray photoelectron spectroscopy, near-edge X-ray absorption f

SUBMITTER: Wilder LM 

PROVIDER: S-EPMC12264862 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature