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Highly porous interconnected MoP decorated graphene oxide as remarkably efficient electrocatalyst.

Rafiq Khosa1, Erum Pervaiz1, Uzair Abdullah1

  • 1Department of Chemical Engineering, School of Chemical and Materials Engineering (SCME), National University of Sciences & Technology (NUST), Sector H-12, Islamabad, 44000, Pakistan.

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Summary

Researchers developed a novel molybdenum phosphide/reduced graphene oxide (MoP/RGO) electrocatalyst for efficient hydrogen production. This MoP/RGO hybrid material demonstrates excellent catalytic activity and stability for the hydrogen evolution reaction (HER).

Keywords:
CatalysisHERMolybdenum phosphideOERRGO

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Hydrogen (H2) production via water splitting is hindered by unfavorable reaction kinetics.
  • Development of robust, active, and stable electrocatalysts is crucial but challenging.

Purpose of the Study:

  • To synthesize a novel molybdenum phosphide/reduced graphene oxide (MoP/RGO) hybrid electrocatalyst.
  • To evaluate the electrocatalytic performance of the MoP/RGO hybrid for the hydrogen evolution reaction (HER).

Main Methods:

  • Synthesis of MoP/RGO hybrid electrocatalysts using a low-temperature phosphorization process under an argon atmosphere.
  • Characterization of the porous interconnected MoP structures anchored on reduced graphene oxide (RGO).
  • Electrochemical evaluation of HER performance in an alkaline solution.

Main Results:

  • The MoP/RGO electrocatalyst exhibited excellent HER performance with an overpotential of 96 mV at 10 mA/cm2 and a Tafel slope of 64 mV/dec.
  • The porous structure facilitated ion and electrolyte transport, enhancing catalytic activity.
  • The optimized electrocatalyst demonstrated long-term stability over 24 hours with minimal potential decrease.

Conclusions:

  • The MoP/RGO hybrid electrocatalyst shows significant potential for efficient and durable hydrogen evolution.
  • Reduced graphene oxide (RGO) plays a key role in preventing particle agglomeration and enhancing conductivity.
  • This novel synthesis approach offers a viable pathway for developing advanced electrocatalysts for HER applications.