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Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
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All-pH-Tolerant In-Plane Heterostructures for Efficient Hydrogen Evolution Reaction.

Zhihua Cheng1, Yukun Xiao1, Wenpeng Wu1

  • 1Key Laboratory of Cluster Science, Ministry of Education of China, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, People's Republic of China.

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Summary

Researchers developed a pH-universal catalyst for efficient hydrogen evolution reaction (HER) by chemically bonding MoS2 and MoC. This novel in-plane heterostructure offers a low overpotential and promising performance for sustainable hydrogen energy production.

Keywords:
MoS2/α-MoChydrogen evolutionin-plane heterostructurepH-universalstrain engineering

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Electrocatalytic hydrogen evolution reaction (HER) is crucial for sustainable hydrogen energy.
  • Current HER catalysts often exhibit pH-dependent performance, limiting their widespread application.
  • Developing pH-universal catalysts is essential for efficient hydrogen production.

Purpose of the Study:

  • To create a novel in-plane heterostructure catalyst for efficient and pH-universal HER.
  • To investigate the synergistic effects between MoS2 and MoC for enhanced catalytic activity.
  • To demonstrate a low-cost and highly efficient material for sustainable hydrogen energy.

Main Methods:

  • Chemical bonding of MoS2 (002) planes and α-MoC {111} planes to form in-plane heterostructures.
  • Analysis of lattice strain and its effect on the electronic configuration of MoS2.
  • Electrochemical characterization including overpotential and Tafel slope measurements.

Main Results:

  • The MoS2/α-MoC in-plane heterostructure demonstrated efficient pH-universal HER.
  • A low overpotential of 78 mV was achieved at 10 mA cm⁻² in acidic solution.
  • The catalyst exhibited Pt-like free Gibbs energy for proton adsorption/desorption and superior performance in neutral and alkaline solutions.

Conclusions:

  • In-plane heterostructures offer a promising strategy for developing advanced HER catalysts.
  • The synergistic interaction between MoS2 and MoC enhances catalytic activity across a wide pH range.
  • This work presents a viable pathway for producing cost-effective, high-performance catalysts for sustainable hydrogen energy.