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Nanoscale Trimetallic Metal-Organic Frameworks Enable Efficient Oxygen Evolution Electrocatalysis.

Fei-Long Li1, Qi Shao1, Xiaoqing Huang1

  • 1College of Chemistry, Chemical Engineering and Materials Science Soochow University, No.199, Ren'ai Road, Suzhou, 215123, Jiangsu, China.

Angewandte Chemie (International Ed. in English)
|November 21, 2017
PubMed
Summary
This summary is machine-generated.

New trimetallic metal-organic frameworks (MOFs) show high efficiency for oxygen evolution reactions (OER). These novel MOFs can be directly used as electrocatalysts, offering a promising alternative for energy applications.

Keywords:
electrocatalysismetal-organic frameworksnickeloxygen evolution reactionporous materials

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Metal-organic frameworks (MOFs) are versatile materials for heterogeneous catalysis.
  • MOFs are typically used as templates for electrocatalyst synthesis, not directly.
  • Oxygen evolution reaction (OER) is crucial for energy conversion but requires efficient electrocatalysts.

Purpose of the Study:

  • To develop novel, directly usable MOF-based electrocatalysts for OER.
  • To investigate the OER activity of Fe/Ni-based trimetallic MOFs (Fe/Ni/Co(Mn)-MIL-53).
  • To optimize MOF composition for enhanced OER performance.

Main Methods:

  • Solvothermal synthesis of Fe/Ni/Co(Mn)-MIL-53 MOFs.
  • Electrochemical characterization of MOFs for OER activity.
  • Compositional tuning of trimetallic MOFs to study activity trends.

Main Results:

  • Fe/Ni/Co(Mn)-MIL-53 MOFs exhibit volcano-type OER activity based on composition.
  • Optimized Fe/Ni2.4 /Co0.4 -MIL-53 achieved 20 mA cm-2 at 236 mV overpotential with a 52.2 mV dec-1 Tafel slope.
  • Growing MOFs on nickel foam further enhanced OER performance.

Conclusions:

  • Fe/Ni/Co(Mn)-MIL-53 MOFs are effective direct electrocatalysts for OER.
  • Compositional engineering is key to optimizing MOF electrocatalytic activity.
  • Integration with conductive supports like nickel foam boosts performance.