Chem. J. Chinese Universities ›› 2025, Vol. 46 ›› Issue (8): 20250095.doi: 10.7503/cjcu20250095

• Physical Chemistry • Previous Articles     Next Articles

Synthesis of Nitrogen-doped Porous Molybdenum Carbide Nanorods and Their Electrocatalytic Hydrogen Evolution Performance in Acidic and Alkaline Media

WANG Yitong1, CAO Yuanyuan1, ZHOU Lina3, YE Rongrong1, LI Di1, LIU Xinxin1, GUO Biao1, ZHOU Lijing1(), ZHAO Zhen1,2()   

  1. 1.Institute of Catalysis for Energy and Environment,College of Chemistry and Chemical Engineering,Shenyang Normal University,Shenyang 110034,China
    2.State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China
    3.China Nuclear Engineering Consulting Co. ,Ltd. ,Beijing 100032,China
  • Received:2025-04-02 Online:2025-08-10 Published:2025-05-28
  • Contact: ZHOU Lijing, ZHAO Zhen E-mail:zlj9333@163.com;zhenzhao@cup.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22102108);the Fundamental Research Funds for Liaoning Universities, China(LJ212410166075);the Youth Foundation of the Education Department of Liaoning Province, China(LQN202004)

Abstract:

Water electrolysis for hydrogen production has been recognized as an ideal pathway toward scalable green hydrogen manufacturing, owing to its renewable feedstock utilization, zero carbon emission byproducts, and high-purity hydrogen output. As the pivotal half-reaction in water splitting, the hydrogen evolution reaction(HER) suffers from sluggish kinetics that fundamentally limits energy conversion efficiency. Consequently, developing HER electrocatalysts with combined high activity and operational stability remains a critical challenge for practical implementation. In this work, nitrogen-doped molybdenum carbide nanorods with hierarchical porous structures were synthesized by precisely regulating key synthesis parameters, including carbonization temperature and glucose content. Their phase composition, chemical state distribution, and morphological features were characterized via X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), nitrogen adsorption-desorption, Raman spectroscopy, scanning electron microscope(SEM), and transmission electron microscope(TEM). Electrochemical evaluations demonstrated that the optimized catalyst requires low overpotentials of merely 161 and 118 mV to achieve a current density of 10 mA/cm2 in 0.5 mol/L H2SO4 and 1 mol/L KOH, respectively. Remarkably, it exhibits exceptional operational stability, sustaining continuous HER operation for 200 h at 10 mA/cm2 in acidic media and 120 h under identical current density in alkaline condition.

Key words: Molybdenum carbide, Nanorods, Water splitting, Hydrogen evolution reaction

CLC Number: 

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