Current Photovoltaic Research

  • 제12권4호
  • /
  • Pages.135-141
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  • 2024
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  • 2288-3274(pISSN)
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  • 2508-125X(eISSN)
한국태양광발전학회 (Korea Photovoltaic Society)
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Photoelectrodeposition of NiMo Catalyst on Cu2O Photocathodes for Enhanced Solar-to-Hydrogen Energy Conversion

  • Ji Hoon Choi (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Ji Hye Jeong (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Hak Hyeon Lee (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Hyung Koun Cho (School of Advanced Materials Science and Engineering, Sungkyunkwan University)
  • 투고 : 2024.10.28
  • 심사 : 2024.12.10
  • 발행 : 2024.12.31
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초록

Photoelectrochemical (PEC) water splitting offers an eco-friendly method to convert solar energy into hydrogen, with recent advancements improving efficiency. However, despite direct hydrogen production on photocathode surfaces, research into high-performance, stable photocathode-specific catalysts remains limited. In this study, we optimized a NiMo hydrogen evolution reaction (HER) catalyst on Cu2O-based photocathodes using a photoelectrodeposition (PED) method to enhance PEC water-splitting efficiency. Key deposition parameters, including light, current density, applied voltage, and time, were systematically controlled to ensure uniform NiMo catalyst deposition without post-treatments. Under simulated 1-sun illumination, the optimized NiMo catalyst achieved 93% of the performance of conventional Pt catalysts and maintained stable hydrogen production for over 20 hours. Electrochemical analysis confirmed superior PEC performance of the NiMo catalyst, particularly at a fixed current density of -1.5 ㎂ cm-2. This study introduces a noble metal-free catalyst deposition method, advancing solar-to-hydrogen conversion efficiency and long-term PEC device stability.

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과제정보

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (2021R1A2C3011870).

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