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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
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Subnanometric Pt-W Bimetallic Clusters for Efficient Alkaline Hydrogen Evolution Electrocatalysis.

Shoushun Chen1, Cong Ma2, Jiabin Xu3

  • 1Lanzhou Magnetic Resonance Center, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.

ACS Nano
|November 28, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a facile strategy to synthesize fully exposed platinum-tungsten subnanometric bimetallic clusters (SBCs) on nitrogen-doped carbon. These PtW/NC materials show exceptional performance for the alkaline hydrogen evolution reaction.

Keywords:
full exposurehydrogen evolutionmetal−organic frameworkpolyoxometalatesubnanometric bimetallic clusters

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Synthesizing subnanometric bimetallic clusters (SBCs) with controlled size and full surface exposure is challenging.
  • Achieving high catalytic activity and stability requires overcoming these synthesis hurdles.

Purpose of the Study:

  • To develop a facile strategy for synthesizing fully exposed platinum-tungsten subnanometric bimetallic clusters (PtW SBCs).
  • To investigate the electrocatalytic performance of PtW SBCs on nitrogen-doped carbon for the hydrogen evolution reaction.

Main Methods:

  • Electrostatic interactions between polyanions ([H3PtW6O24]5-) and a positively charged metal-organic framework (MOF) were utilized.
  • Spherical N-doped carbon supports were employed for the synthesis of PtW/NC.
  • Electrochemical measurements and theoretical calculations were performed to assess catalytic activity and stability.

Main Results:

  • Fully exposed PtW SBCs with an average size of 0.81 nm were successfully synthesized on N-doped carbon (PtW/NC).
  • PtW/NC demonstrated excellent electrocatalytic activity for the alkaline hydrogen evolution reaction, with an ultralow overpotential of 4 mV at 10 mA cm-2.
  • The material exhibited remarkable stability (>140 h) and a Pt mass activity 34 times higher than commercial Pt/C.

Conclusions:

  • A synergistic effect between Pt and W contributes to the superior catalytic performance.
  • The developed synthetic approach is versatile and applicable to other MOFs and porous materials.
  • This work offers a promising pathway for designing advanced electrocatalysts.