Manipulating Oxygen Vacancy in SrTiO3 Nanoparticles to Achieve Enhanced Photoelectrochemical Performance in Water Splitting

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Nano Materials Pub Date : 2024-11-27 DOI:10.1021/acsanm.4c0555810.1021/acsanm.4c05558

Xiaoli Ran, Yang Bai, Hao Zeng, Junhao Zhang, Haitao Fu*, Xizhong An and Xiaohong Yang*,

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Abstract

Introducing oxygen vacancies into perovskite-type SrTiO₃ nanoparticles usually takes dual or multiple steps, which are not conducive to subsequent modification and application. Herein, a facile nonstoichiometric method is applied to synthesize a series of oxygen vacancy (V_O)-doped SrTiO₃ (Sr_1–XTiO₃_–δ) as a photoanode material in photoelectrochemical (PEC) water-splitting reactions. Experimental results reveal a nonlinear relationship between the PEC performance and V_O concentration in SrTiO₃ nanoparticles. Sr_1–XTiO₃_–δ doped with an appropriate amount of V_O can significantly enhance its light response and electrocatalytic activity. The optimal Sr_0.95TiO₃_–δ demonstrated the best PEC activity with an incident photon-to-current conversion efficiency of 3.144 times higher than that of pristine SrTiO₃. Enhanced PEC activity is attributed to superior light absorption and retarded photogenerated charge carrier recombination. This work systematically reveals the role of oxygen vacancies in SrTiO₃ nanoparticles for achieving enhanced PEC performance in water splitting, which may offer inspiration for defect engineering of perovskite oxides.

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来源期刊

ACS Applied Nano Materials Multiple-

CiteScore

8.30

自引率

3.40%

发文量

1601

期刊介绍： ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.