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Atomically Thin Holey Two-Dimensional Ru2P Nanosheets for Enhanced Hydrogen Evolution Electrocatalysis.

Xiaoyan Jin1, Haeseong Jang2, Nutpaphat Jarulertwathana3

  • 1Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea.

ACS Nano
|September 26, 2022
PubMed
Summary

Researchers developed atomically thin, holey ruthenium phosphide (Ru2P) nanosheets for efficient hydrogen evolution reaction (HER) catalysis. These defect-engineered nanomaterials show superior performance in acidic and alkaline conditions, advancing renewable energy technologies.

Keywords:
defectelectrocatalystin situ analysisnanosheetruthenium phosphide

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Defect engineering in low-dimensional nanostructured materials is crucial for high-performance electrocatalysts.
  • Electrocatalysts are vital for efficient renewable energy technologies like hydrogen production.

Purpose of the Study:

  • To develop an efficient method for fabricating atomically thin, holey metal-phosphide nanosheets.
  • To investigate the electrocatalytic functionality of these novel nanosheets for the hydrogen evolution reaction (HER).

Main Methods:

  • Synthesis of two-dimensional, subnanometer-thick, holey Ru2P nanosheets via phosphidation of monolayer RuO2 nanosheets.
  • Characterization of crystal defects and morphology of the synthesized nanosheets.
  • Electrochemical evaluation of HER activity in acidic and alkaline electrolytes.

Main Results:

  • Holey Ru2P nanosheets exhibited superior HER electrocatalytic activity compared to nonholey Ru2P nanoparticles.
  • Achieved low overpotentials of 17 mV (acidic) and 26 mV (alkaline), positioning them as top-performing Ru-P-based HER catalysts.
  • In situ studies revealed enhanced surface hydrogen accumulation due to holey morphology, favoring the Volmer-Tafel mechanism.

Conclusions:

  • Atomically thin, holey Ru2P nanosheets are highly effective electrocatalysts for the hydrogen evolution reaction.
  • The defect-engineered, holey nanostructure significantly enhances HER performance by facilitating proton/water adsorption.
  • This work presents a promising pathway for designing advanced electrocatalysts for sustainable energy applications.