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2025 Vol.35, Issue 2

Research Paper

Enhanced Oxygen Evolution in 0.1 % Fe-Doped NiS2 on Carbon Cloth
Shoupik Mullani1
,
Vaibhav Lokhande2
,
Chihoon Kim1
,
Shital Bachankar1
,
Aditi Kumbhar1
,
Taeksoo Ji1†
1Department of Intelligent Electronics and Computer Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
2Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, The University of Newcastle, Newcastle 2308, Australia
†Corresponding author E-Mail : tji@chonnam.ac.kr (T. Ji, Chonnam Nat’l Univ.)
27 February 2025. pp. 51-57
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Abstract

With increasing globalization and the urgent need for sustainable energy solutions, electrochemical water splitting has emerged as a crucial technology for clean energy production. In this study, we report the successful synthesis of 0.1 % Fe-doped NiS2 via a one-step hydrothermal method. The incorporation of Fe into the NiS2 matrix significantly enhances its electrochemical performance, as evidenced by a remarkable reduction in overpotential, to 180 mV at a current density of 10 mA cm-2, compared to 250 mV for undoped NiS2. Additionally, the Fe-doped NiS2 exhibits a reduced Tafel slope, high double layer capacitance, and lower charge transfer resistance than undoped NiS2, indicating improved reaction kinetics for oxygen evolution. These improvements are attributed to the enhanced conductivity and catalytic activity imparted by Fe doping, which facilitates more efficient charge transfer and reaction processes at the electrode surface. The results suggest that Fe-doped NiS2 is a highly promising and robust candidate for applications in electrochemical energy conversion. Moreover, the doping strategy employed here offers a valuable approach for tailoring the properties of other metal sulfides and chalcogenides, paving the way for the design of next generation electrocatalysts that can drive large-scale energy conversion processes with minimal energy loss.

Keywords
water splitting
autoxidation
overpotential
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 35
  • No :2
  • Pages :51-57
  • Received Date : 2024-11-19
  • Revised Date : 2025-01-15
  • Accepted Date : 2025-01-17
  • DOI :https://doi.org/10.3740/MRSK.2025.35.2.51
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