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Peer-reviewedCC BY 4.0Catalysts

Ni-Regulated Self-Supported Mo-Based Electrodes for Hydrogen Production from High-Strength Livestock Wastewater

  • Ying Mei1,2
  • Zhu Gao1
  • Yi Zheng3
  • Yixiang Shi4
  • Peiqi Jia1
  • Pengxia Ji1,2
  • Yu Xia1,2
4 affiliations
  1. 1College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010080, China
  2. 2Key Laboratory of Wind Energy and Solar Energy Utilization Technology, Ministry of Education, Inner Mongolia University of Technology, Hohhot 010080, China
  3. 3College of Renewable Energy, Inner Mongolia University of Technology, Ordos 017000, China
  4. 4Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
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Abstract

Developing highly active and stable self-supported electrodes is critical for efficient hydrogen production from high-strength livestock wastewater. Herein, self-supported NixMo1LDH-SP/NF electrodes (x = 1, 2, 3, and 4) were fabricated on nickel foam (NF) via a two-step hydrothermal process followed by sulfur/phosphorus (S/P) heat treatment. The effects of Ni precursor dosage on the electrode structure and hydrogen evolution reaction (HER) performance were systematically investigated. Varying the Ni dosage primarily modulated surface-layer assembly, while the electrodes exhibited similar Mo-based crystalline features across the series. Among the as-prepared electrodes, Ni2Mo1LDH-SP/NF exhibited the best HER performance in 1 M KOH, which was attributed to its radially assembled hierarchical rod architecture and abundant surface species that promoted electrolyte accessibility and active-site exposure. During electrolysis of high-strength livestock wastewater (OP3), Ni2Mo1LDH-SP/NF delivered lower cell voltages than NF in OP3-U, OP3-CF, and OP3-D, resulting in 18.4%, 17.4%, and 36.7% higher hydrogen production rates, respectively, while maintaining high hydrogen purity. Moreover, Ni2Mo1LDH-SP/NF consistently maintained higher hydrogen production rates than NF across varying concentrations of ammonia nitrogen (NH3-N), nitrate nitrogen (NO3−-N), total phosphorus (TP), and chemical oxygen demand (COD). Overall, the intermediate Ni/Mo precursor ratio enabled Ni2Mo1LDH-SP/NF to achieve a favorable balance between reaction kinetics, active-site accessibility, and interfacial mass transfer, highlighting its potential for hydrogen production from high-strength livestock wastewater.

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Cite

BibTeXRIS
BibTeX
@article{mei2026niregulated,
  title = {{Ni-Regulated Self-Supported Mo-Based Electrodes for Hydrogen Production from High-Strength Livestock Wastewater}},
  author = {Ying Mei and Zhu Gao and Yi Zheng and Yixiang Shi and Peiqi Jia and Pengxia Ji and Yu Xia},
  journal = {Catalysts},
  year = {2026},
  month = oct,
  doi = {10.3390/catal16110956},
  url = {https://www.mdpi.com/2073-4344/16/11/956},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Ni-Regulated Self-Supported Mo-Based Electrodes for Hydrogen Production from High-Strength Livestock Wastewater
AU  - Ying Mei
AU  - Zhu Gao
AU  - Yi Zheng
AU  - Yixiang Shi
AU  - Peiqi Jia
AU  - Pengxia Ji
AU  - Yu Xia
PY  - 2026
DA  - 2026/10/27
JO  - Catalysts
DO  - 10.3390/catal16110956
UR  - https://www.mdpi.com/2073-4344/16/11/956
AB  - Developing highly active and stable self-supported electrodes is critical for efficient hydrogen production from high-strength livestock wastewater. Herein, self-supported NixMo1LDH-SP/NF electrodes (x = 1, 2, 3, and 4) were fabricated on nickel foam (NF) via a two-step hydrothermal process followed by sulfur/phosphorus (S/P) heat treatment. The effects of Ni precursor dosage on the electrode structure and hydrogen evolution reaction (HER) performance were systematically investigated. Varying the Ni dosage primarily modulated surface-layer assembly, while the electrodes exhibited similar Mo-based crystalline features across the series. Among the as-prepared electrodes, Ni2Mo1LDH-SP/NF exhibited the best HER performance in 1 M KOH, which was attributed to its radially assembled hierarchical rod architecture and abundant surface species that promoted electrolyte accessibility and active-site exposure. During electrolysis of high-strength livestock wastewater (OP3), Ni2Mo1LDH-SP/NF delivered lower cell voltages than NF in OP3-U, OP3-CF, and OP3-D, resulting in 18.4%, 17.4%, and 36.7% higher hydrogen production rates, respectively, while maintaining high hydrogen purity. Moreover, Ni2Mo1LDH-SP/NF consistently maintained higher hydrogen production rates than NF across varying concentrations of ammonia nitrogen (NH3-N), nitrate nitrogen (NO3−-N), total phosphorus (TP), and chemical oxygen demand (COD). Overall, the intermediate Ni/Mo precursor ratio enabled Ni2Mo1LDH-SP/NF to achieve a favorable balance between reaction kinetics, active-site accessibility, and interfacial mass transfer, highlighting its potential for hydrogen production from high-strength livestock wastewater.
SN  - 2073-4344
ER  -