Unveiling Valence State-Dependent Photocatalytic Water Splitting Activity and Photocathodic Behavior in Visible Light-Active Iridium-Doped BaTiO₃.

ABSTRACT: Despite having favorable energetics and tunable optoelectronic properties, utilization of BaTiO₃ (BTO) for photocatalytic reactions is limited by its absorption only in the ultraviolet region. To address this challenge, BTO is doped with iridium (Ir) to induce visible light absorption. The visible light-induced photocatalytic H₂ generation efficiency is enhanced by 2 orders of magnitude on selective conversion of the Ir valence state from Ir⁴⁺ to Ir³⁺. To understand such intriguing behavior, valence state-dependent changes in the optoelectronic, structural, and surface properties and electronic band structure are comprehensively investigated. The effect of electron occupancy change between Ir⁴⁺ (t_2g⁵ e_g

SUBMITTER: Chandrappa S 

PROVIDER: S-EPMC10895576 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature