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Updated: Feb 26, 2026

Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts
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Interfacial engineered Mo2C/MoO2 heterojunction electrocatalyst for efficient hydrogen evolution in alkaline brine.

Jiarong Mu1, Xiaotong Xu1, Jianfang Jing1

  • 1Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China. cesyg@imu.edu.cn.

Chemical Communications (Cambridge, England)
|February 24, 2026
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Summary
This summary is machine-generated.

Researchers developed a new catalyst for hydrogen evolution reaction (HER) using a molybdenum carbide/molybdenum dioxide heterojunction. This non-precious metal catalyst shows high activity and stability in alkaline conditions, advancing water electrolysis technology.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Transition metal carbides face challenges in hydrogen evolution reaction (HER) due to sluggish kinetics and limited active sites in alkaline media.
  • Developing efficient, non-precious metal electrocatalysts is crucial for industrial water electrolysis hydrogen production.

Purpose of the Study:

  • To engineer a novel Mo2C/MoO2 heterojunction on a nitrogen-doped carbon substrate for enhanced HER performance.
  • To investigate the role of interfacial electron transfer in optimizing hydrogen adsorption and catalytic activity.

Main Methods:

  • Synthesis of a Mo2C/MoO2 heterojunction catalyst supported on nitrogen-doped carbon.
  • Electrochemical characterization of the catalyst for hydrogen evolution reaction in alkaline and alkaline saltwater environments.
  • Evaluation of catalytic activity and long-term stability.

Main Results:

  • The Mo2C/MoO2 heterojunction effectively regulated electronic structure and surface properties.
  • Efficient interfacial electron transfer optimized hydrogen adsorption energy, enhancing reaction kinetics.
  • The catalyst demonstrated HER activity comparable to commercial Pt/C (13/23 mV overpotential at 10 mA cm-2) with stability up to 300 hours.

Conclusions:

  • Interfacial engineering of transition metal carbides is a promising strategy for designing high-performance electrocatalysts.
  • The developed Mo2C/MoO2 heterojunction catalyst offers a viable alternative to precious metals for alkaline water electrolysis.
  • This research provides significant implications for the industrialization of hydrogen production technology.