articleACS CatalysisJan 23, 2026HYBRID OA

Stepwise Acceleration of Water Dissociation and Hydrogen Spillover for Enhanced Overall Alkaline Hydrogen Evolution

陆陆天虹JLJing LiCYC Y WangHLHeng LiuSYSongbo Ye

Nanjing Normal University · Tohoku University · +6 more institutions

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Abstract

Improving the overall kinetics of the alkaline hydrogen evolution reaction (HER) is crucial for practical applications such as anion exchange membrane water electrolysis (AEMWE). However, the overall catalytic efficiency remains limited because most existing strategies focus only one elementary step, either water dissociation or hydrogen adsorption. Herein, we propose an auxiliary-driving strategy by incorporating VO2 around Ru active sites to consecutively optimize Volmer and Heyrovsky steps. The formation of V–O–Ru conjugated π-bonds promotes water dissociation by dynamically modulating the electronic structure. Meanwhile, reversible hydrogen spillover optimizes the hydrogen adsorption free energy (ΔGH*),…

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4
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20.06
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100%
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69
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16

Topics & keywords

Topics
Keywords
  • Catalysis
  • Dissociation (chemistry)
  • Water splitting
  • Hydrogen
  • Overpotential
  • Electrolysis of water
  • Hydronium
  • Hydrogen production
UN Sustainable Development Goals
  • Clean water and sanitation
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