Strontium-substituted phosphomolybdate anchored on Ba0.5Sr0.5TiO3 thin films towards electrocatalytic hydrogen storage application

Bahareh Mohajeri, Maryam Shaterian and Mohammad Ali Rezvani

Energy, 2025, vol. 335, issue C

Abstract: Hydrogen recognized for its high energy density and minimal environmental impact, is a promising candidate for renewable energy. However, efficient hydrogen storage is still a critical challenge. This study addresses this gap by exploring the synthesis and characterization of a new nanocomposite based on strontium(II)-coordinated polyoxometalate (PMo10Sr2) immobilized on barium strontium titanate (Ba0.5Sr0.5TiO3, abbreviated as BST) thin films for electrochemical hydrogen storage application. Characterization studies were performed using FT-IR, XRD, FE-SEM, UV–vis, EDX, and BET analyses. The hydrogen storage capacity (HSC) of the PMo10Sr2@BST was evaluated through chronopotentiometry (CHP) test in 6.0 M KOH electrolyte. After 15 cycles, the HSC of pristine Keggin-type PMo10Sr2 and BST were determined to be 1592.21 and 1349.51 mAhg−1, respectively, at the optimal current of 1.0 mA. Notably, the PMo10Sr2@BST nanocomposite exhibited a significant HSC of 2626.75 mAh/g after 15th cycle under the same conditions. These findings demonstrate the potential of the PMo10Sr2@BST nanocomposite as an efficient hydrogen storage material, paving the way for advancements in clean energy technology.

Keywords: Renewable energy; Hydrogen storage; Polyoxometalate; Barium strontium titanate; Chronopotentiometry (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:335:y:2025:i:c:s0360544225037247

DOI: 10.1016/j.energy.2025.138082

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