Long-Lived Hole Accumulation in Al:SrTiO₃/Rh-Cr Photocatalyst Systems under Continuous Irradiation and Its Correlation with Overall Water Splitting Efficiency.

ABSTRACT: Photocatalytic water splitting offers a scalable and potentially low-cost route for the production of renewable hydrogen. Recently, a state-of-the-art system based on flux-mediated Al³⁺-doped SrTiO₃, modified with Rh-Cr-based proton reduction and CoOOH water oxidation cocatalysts, achieved apparent quantum yields for unassisted water splitting of up to 93%. Herein, we focus on the role of Al³⁺ doping and Rh-Cr-based cocatalyst deposition on the accumulation and reaction dynamics of the long-lived holes required to drive water oxidation. We employ in situ and operando photoinduced absorption spectroscopy (PIAS) under water splitting conditions complemented by X-ray photoelectron spectroscopy (XPS). XPS data indicate that Al³⁺ doping suppresses sur

SUBMITTER: Wilson AA 

PROVIDER: S-EPMC12464978 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature