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Nitrogen-Phosphorus-Doped Trimetallic Hollow MOF for Efficient Oxygen Evolution Reactions
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  • Xudun Shen,
  • Liping Huang,
  • Shuaishuai Li,
  • Longnian Tang,
  • Qiumei Lei,
  • Bowang Zhao,
  • Wenyao Li,
  • Min Zeng,
  • Guanjie He
Xudun Shen
Shanghai University of Engineering Science
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Liping Huang
Shanghai University of Engineering Science
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Shuaishuai Li
Shanghai University of Engineering Science
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Longnian Tang
Shanghai University of Engineering Science
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Qiumei Lei
Shanghai University of Engineering Science
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Bowang Zhao
Shanghai University of Engineering Science
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Wenyao Li
Shanghai University of Engineering Science
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Min Zeng
Shanghai Jiao Tong University
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Guanjie He
University College London

Corresponding Author:[email protected]

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Abstract

We employed a synergistic approach by utilizing in situ etching and phosphating techniques on trimetallic zeolitic imidazolate frameworks (ZIFs) to facilitate the conversion of CoFeNi-ZIFs into CoFeNi/Z-P NC (Nitrogen-doped graphene coating) nanocomposites. Remarkably, the resulting CoFeNi/Z-P NC materials have a large surface area and a lot of pore volume, making their active sites more accessible and makes mass transfer more effective. Additionally, the introduction of Fe and Ni guest metals into the CoP crystal lattice without phase segregation ensures a homogeneous distribution while altering the electrical characteristics. Leveraging these advantages, the CoFeNi/Z-P NC nanocomposites demonstrate a notable enhancement for the OER, 10mA cm-2 is achieved at a low overpotential with a current density of 244mV for alkaline solutions, with a low Tafel slope of 66.2mV dec-1 and has good stability.