Citation

Azad, Sameen and Aamir, Muhammad and Lee, It Ee and Wali, Qamar and Akhtar, Javeed and Khan, Muhammad Ejaz and Abdullah, Huda and Alharbi, Hamad F. and Akhtaruzzaman, Md. and Shahiduzzaman, Md. and Nunzi, Jean-Michel (2026) Synthesis of strontium-incorporation SnO2 for oxygen evolution reaction. iScience, 29 (7). p. 116572. ISSN 25890042

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Abstract

Modulating the electronic structure of metal oxides is an effective strategy to enhance the electrocatalytic oxygen evolution reaction (OER). Shifting the conduction band (CB) to more negative potentials facilitates interfacial charge transfer, improving OER kinetics. Here, strontium (Sr) is incorporated into SnO2 to shift the CB, induce lattice strain, and generate oxygen vacancies. Structural and electrochemical analyses reveal that intermediate Sr incorporation optimally balances electronic modulation and defect density, yielding the highest OER activity. This catalyst delivers an overpotential of 430 mV at 10 mA cm− 2 , a Tafel slope of 68 mV dec− 1 , and stable operation over 5.2 h in 1.0 M KOH. The enhanced performance is driven primarily by improved interfacial charge transfer kinetics rather than benchmark intrinsic activity. This work demonstrates how aliovalent doping tunes the band structure and defect chemistry of cost-effective oxides, providing a scalable strategy for designing non-precious metal water splitting catalysts.

Item Type:	Article
Uncontrolled Keywords:	Electronic structure
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics
Divisions:	Faculty of Artificial Intelligence & Engineering (FAIE)
Depositing User:	Ms Rosnani Abd Wahab
Date Deposited:	31 Jul 2026 06:35
Last Modified:	31 Jul 2026 06:35
URII:	http://shdl.mmu.edu.my/id/eprint/16417

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