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Transition metal-based selenide materials derived from ZIF-67 as efficient urea and seawater splitting electrocatalyst

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  • Wang, Hui
  • Du, Xiaoqiang
  • Zhang, Xiaoshuang

Abstract

The preparation of cost-effective multifunctional catalysts for seawater splitting and urea splitting to achieve large-scale renewable energy (hydrogen) production remains a major challenge. In this paper, Mo-Co9Se8/Fe-NiSe/Ni3Se2/NF with heterostructures was prepared through hydrothermal process using the strategy of element doping and construction of heterogeneous composite materials. In the alkaline urea solution, the Mo-Co9Se8/Fe-NiSe/Ni3Se2/NF material showed superior urea oxidation reaction (UOR) (j10/100 = 1.402/1.45 V) and hydrogen evolution reaction (HER) (j10/100 = 127/242 mV) activity. For the two-electrode electrolyzer (UOR//HER), the battery voltage for urea splitting was 1.529 V at the current density of 10 mAcm−2. Moreover, high efficiency hydrogen evolution is also achieved in alkaline seawater solution, and the current density of 10, 100 mAcm−2 can be obtained under the overpotential of 89 mV and 191 mV, respectively. Density functional theory (DFT) analysis shows that the synergistic affect between the high urea adsorption energy of Fe-NiSe and the excellent electrical conductivity of Mo-Co9Se8 improve the adsorption and desorption of intermediates for UOR, thereby improving the catalyst activity. This study provides a new method for designing efficient multifunctional urea and seawater splitting catalysts.

Suggested Citation

  • Wang, Hui & Du, Xiaoqiang & Zhang, Xiaoshuang, 2025. "Transition metal-based selenide materials derived from ZIF-67 as efficient urea and seawater splitting electrocatalyst," Renewable Energy, Elsevier, vol. 244(C).
    • Handle: RePEc:eee:renene:v:244:y:2025:i:c:s0960148125003258
    DOI: 10.1016/j.renene.2025.122663
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    References listed on IDEAS

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    1. Ling Zhou & Daying Guo & Lianhui Wu & Zhixi Guan & Chao Zou & Huile Jin & Guoyong Fang & Xi’an Chen & Shun Wang, 2024. "A restricted dynamic surface self-reconstruction toward high-performance of direct seawater oxidation," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    2. Wang, Lili & He, Wurigamula & Yin, Duanduan & Zhang, Helin & Liu, Dongyan & Yang, Ying & Yu, Wensheng & Dong, Xiangting, 2023. "CoN/MoC embedded in nitrogen-doped multi-channel carbon nanofibers as an efficient acidic and alkaline hydrogen evolution reaction electrocatalysts," Renewable and Sustainable Energy Reviews, Elsevier, vol. 181(C).
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