Dual-step pulsed electrodeposition enables microstructural control and redox kinetics in iron oxide films.

Po-Wei Chi, Jinx Xian Lin, Phillip M Wu, Hwai-En Lin

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Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 authors.

Po-Wei ChiInstitute of Physics, Academia Sinica, 128, Section 2, Academia Road, Taipei, 11529, Taiwan. poweichi@gate.sinica.edu.tw.

Jinx Xian LinDepartment of Mechanical Engineering, College of Mechanical & Electrical Engineering, National Taipei University of Technology (Taipei Tech), 1, Section 3, Zhongxiao E. Road, 10608, Taipei, Taiwan.

Phillip M WuInstitute of Physics, Academia Sinica, 128, Section 2, Academia Road, Taipei, 11529, Taiwan.

Hwai-En LinDepartment of Mechanical Engineering, College of Mechanical & Electrical Engineering, National Taipei University of Technology (Taipei Tech), 1, Section 3, Zhongxiao E. Road, 10608, Taipei, Taiwan. linhe@mail.ntut.edu.tw.

Funding

Ministry of Science and Technology, Taiwan MOST 441-2222-E-027-010-MY2National Science and Technology Council NSTC 112-2221-E-027-117-MY2National Science and Technology Council NSTC 113-2112-M-001-046

6 · The paper itself

Abstract

This work investigates the effect of deposition parameters on the structural and electrochemical performance of iron oxide thin films fabricated via direct reverse-pulsed hydrothermal electrodeposition (RP-HED) and dual-step reverse-pulsed hydrothermal electrodeposition (DRP-HED). By systematically varying the duty cycle (0.1, 0.25, and 0.5) and pulse frequency (10, 100, and 500 Hz), we correlated the changes in film morphology, crystallinity, surface wettability, and capacitive behavior. XRD analysis revealed that the DRP-HED samples possessed smaller crystallite sizes (22-35 nm) and more stable lattice constants (a = 8.371-8.394 Å) compared to RP-HED counterparts. Contact angle measurements showed improved surface energy, with the lowest contact angle of 62.16° observed for the DRP-HED sample at a 0.5 duty cycle and 10 Hz. Electrochemical characterization demonstrated that the DRP-HED sample prepared at a duty cycle of 0.25 and 10 Hz achieved the highest specific areal capacitance of 22.22 mF cm

Indexed as

Electrochemical characterizationElectrodepositionIron oxidesPulse electrodepositionSupercapacitor

Identifiers

PMID41309874

DOI10.1038/s41598-025-26573-1

PMCPMC12660770

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