Fabrication of highly efficient 1D pod-like NiFe2O4-NixFe1-xS heterojuncion electrocatalysts for enhanced oxygen evolution reaction

doi:10.7503/cjcu20250156

Chem. J. Chinese Universities

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Fabrication of highly efficient 1D pod-like NiFe₂O₄-Ni_xFe_1-xS heterojuncion electrocatalysts for enhanced oxygen evolution reaction

CHEN Hong¹，ZHANG Hang¹，FU Siyu¹，ZHANG Xin²，MU Jiajia¹

1. College of Science, Beihua University 2. School of Materials Science and Engineering, Beihua University

Received:2025-06-05 Revised:2025-06-30 Online First:2025-07-07 Published:2025-07-07
Contact: MU Jiajia E-mail:allthat2010@126.com
Supported by:
Supported by the National Natural Science Foundation of China(No.51602006), the Foundation of Science and Technology Department of Jilin Province，China(Nos.YDZJ202401389ZYTS, YDZJ202301ZYTS276), the Foundation of the Department of Education of Jilin Province，China (No.JJKH20230056KJ) and the College Student Innovation Training Program of Beihua University, China(No.S202410201092)

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Abstract

Abstract: To address the challenges of insufficient activity and sluggish kinetics in oxygen evolution reaction (OER) catalysts, this study innovatively designed and synthesized a one-dimensional pod-like NiFe₂O₄-NiₓFe_1-ₓS heterojunction material via a two-step method combining electrospinning and sulfurization calcination. By regulating the sulfurization temperature (350–550 °C), the interfacial heterostructure and component synergy were optimized. Characterization results revealed that the sample sulfurized at 450 °C (NiFe₂O₄-NiₓFe_1-ₓS-450) exhibited NiₓFe_1-ₓS nanosheets uniformly anchored on NiFe₂O₄nanorods, forming a stable heterointerface with coexisting Fe²⁺/Fe³⁺and Ni²⁺/Ni³⁺multivalent states, along with enriched oxygen vacancies. Electrochemical tests demonstrated outstanding OER performance in 1 M KOH, achieving low overpotentials of 344 mV and 396 mV at current densities of 10 mA cm^-² and 50 mA cm^-², respectively, and a Tafel slope of 40.7 mV dec^-¹. The Electronic redistribution at the heterointerface enhanced exposed active sites, oxygen vacancies accelerated charge transfer. The one-dimensional pod-like structure improved mass transport efficiency and structural stability. This work provides a new paradigm for the Rational design of transition metal-based heterojunction catalysts through structure-performance synergy, offering valuable insights for advancing efficient water-splitting technologies.

Key words: Oxygen evolution reaction, Heterointerface, Charge transfer, One-dimensional pod-like structure

CLC Number:

O643.3

TrendMD:

CHEN Hong, ZHANG Hang, FU Siyu, ZHANG Xin, MU Jiajia. Fabrication of highly efficient 1D pod-like NiFe₂O₄-Ni_xFe_1-xS heterojuncion electrocatalysts for enhanced oxygen evolution reaction[J]. Chem. J. Chinese Universities, doi: 10.7503/cjcu20250156.

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Fabrication of highly efficient 1D pod-like NiFe₂O₄-Ni_xFe_1-xS heterojuncion electrocatalysts for enhanced oxygen evolution reaction

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